UCC2897A

ACTIVE

110-V active clamp current mode PWM controller with P-channel clamp FET and line OV protection

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Product details

Parameters

Topology Active-Clamp Forward, Forward Control method Current VCC (Min) (V) 8.5 VCC (Max) (V) 16 Duty cycle (Max) (%) 74 UVLO thresholds on/off (V) 12.7/~8 Frequency (Max) (kHz) 1000 Operating temperature range (C) -40 to 125 Gate drive (Typ) (A) 2 Features HV Start-up, Input Line Monitor, Programmable Slope Compensation, Soft Start, Soft Switching, Supports PFET Clamp Rating Catalog open-in-new Find other PWM controllers & resonant controllers

Package | Pins | Size

TSSOP (PW) 20 42 mm² 6.5 x 6.4 VQFN (RGP) 20 16 mm² 4 x 4 open-in-new Find other PWM controllers & resonant controllers

Features

  • Low-output jitter
  • Soft-stop shutdown of MAIN and AUX
  • 110-V input startup function
  • Ideal for active-clamp, reset-forward, flyback and synchronous rectifier uses
  • Provides complementary auxiliary driver with programmable dead time (Turn-On Delay) between AUX and MAIN switches
  • Peak current-mode control with 0.5-V cycle-by-cycle current limiting
  • TrueDrive™ 2-A Sink, 2-A source outputs
  • Trimmed internal-bandgap reference for accurate line UV and line OV threshold
  • Programmable slope compensation
  • High-performance 1-MHz synchronizable oscillator with internal timing capacitor
  • Precise programmable maximum duty cycle
  • PB-free lead finish package

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Description

The UCC2897A PWM controller simplifies implementation of the various active clamp or reset and synchronous rectifier switching power topologies.

The UCC2897A is a peak current-mode fixed-frequency high-performance pulse-width modulator. The controller includes the logic and the drive capability for the P-channel auxiliary switch along with a simple method of programming the critical delays for proper active-clamp operation.

Features include an internal programmable slope compensation circuit, precise DMAX limit, and a synchronizable oscillator with an internal-timing capacitor. An accurate line-monitoring function also programs the ON and OFF transitions of the converter with regard to the bulk input voltage, VIN.

The UCC2897A adds a second-level hiccup-mode current-sense threshold, bi-directional synchronization and input-overvoltage protection functionalities. The UCC2897A is offered in 20-pin TSSOP (PW) and 20-pin QFN (RGP) packages.

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Technical documentation

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$149.00
Description
The TPS2372 evaluation module (TPS2372-4EVM-006) contains evaluation and reference circuitry for the TPS2372, which is a IEEE802.3bt PoE PD controller suitable for high power PoE PD applications such as LED lighting and modules.

In need of an IEEE802.3bt-ready PSE controller? Check out the TPS23880 (...)
Features
  • IEEE802.3bt compliant PoE PD
  • Automatic MPS
  • Inrush Delay
  • AutoClass
EVALUATION BOARDS Download
document-generic User guide
$199.00
Description

The TPS2373 evaluation module (TPS2373-4EVM-758) contains evaluation and reference circuitry for the TPS2373, which is a IEEE802.3bt PoE PD controller suitable for high power PoE PD applications. The EVM is designed with a 5V active clamp forward isolated converter for high efficiency, 70W PD (...)

Features
  • IEEE802.3bt-ready PoE PD
  • 5V/14A High Efficiency Active Clamp Converter
  • Automatic MPS
  • Advanced Startup
EVALUATION BOARDS Download
document-generic User guide
$99.00
Description

The UCC2897A evaluation module (EVM) is an active clamp reset forward converter providing a 3.3-V regulated output at 30 A of load current, operating from a 48-V input. The design operates over the full 36-V to 72-V telecom input range, and is able to fully regulate down to zero load current. The (...)

Features
  • ZVS transformer reset using active clamp technique in forward converter.
  • All surface mount components, double sided half brick (2.2 x 2.28 x 0.5).
  • Low-side active clamp with programmable dead time for ZVS.
  • Current-Mode Control with bi-directional sync function.
  • Internal PWM slope compensation.
  • Start up (...)

Design tools & simulation

SIMULATION MODELS Download
SLUM429.ZIP (122 KB) - PSpice Model
SIMULATION MODELS Download
SLUM604.ZIP (43 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SLUM605.TSC (5104 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLUM606.TSC (2323 KB) - TINA-TI Reference Design
CALCULATION TOOLS Download
SLUC662A.ZIP (102 KB)

Reference designs

REFERENCE DESIGNS Download
Class 8 high power PoE isolated active clamp forward converter (24V/3A) reference design
PMP20878 — This reference design is a high power PoE Powered Device (PD) plus active clamp forward converter.  The TPS2373 high power PD controller EVM (TPS2373-4EVM-758) provides all functions necessary to implement an IEEE802.3bt-ready PD.  This is paired up with an active clamp forward converter (...)
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Class 5 PoE PD (12 V/2.5 A) supply reference design with smooth transition to auxiliary
PMP21103 — This reference design implements an IEEE802.3bt compliant Class 5 Power over Ethernet (PoE) Powered Device (PD) with smooth transition between the PoE input and an auxiliary supply connected to the output.  The design consists of a 12-V/2.5-A active clamp forward converter utilizing the (...)
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48V-60VDC Input, 12V/250W Active Clamp Forward Reference Design
PMP9656 This reference design generates a 12V/21A output from 54V DC input. The UCC2897A controls an active clamp forward converter power stage. The low gate charge and low RDSon of the CSD18532Q5B, implemented as self-driven synchronous rectifiers, allow this design to achieve a max load efficiency of (...)
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High Efficiency 36-60V Input Isolated Synchronous Flyback Converter Reference Design (12V/4A)
PMP20541 — The PMP20541 reference design is an isolated synchronous flyback converter with a 12V/4A output.  The 36-60V input is suitable for most telecom and PoE applications.  The UCC2897A PWM controller has dual drivers for precise control of the primary FET and synchronous FET.
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
18-72VDC Input, 12V/120W Active Clamp Forward Reference Design
PMP8861 This reference design generates a 12V/10A output from a wide range 18V to 72V telecom input. The UCC2897A controls an active clamp forward converter power stage. The low gate charge and low RDSon of the CSD18533Q5A, implemented as a synchronous rectifier, provides for a highly efficient design. This (...)
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3.3V/15A Active Clamp Forward Reference Design
PMP20850 — This reference design is a 50W active clamp forward converter with synchronous rectification on the secondary side. The design provides an isolated, 3.3V/15A output from a standard telecom -36V to -72V input at >91% efficiency. PMP20850 utilizes a self driven, synchronous rectifier which requires (...)
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REFERENCE DESIGNS Download
36V-60V Input 12V/5A Highly Efficient Active Clamp Forward Reference Design
PMP20742 — The PMP20742 reference design provides 12V at 5A (60W) from a 36V-60Vdc input with over 94% efficiency. This design uses the UCC2897A active clamp controller along with synchronous rectifiers to achieve very high efficiency.  Typical applications include Power Over Ethernet, Telecom, and Server (...)
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24V to 12V/3.4A Active Clamp Forward Converter Reference Design with Robust System Protection
PMP10861 — The PMP10861 uses active clamp forward converter for an isolated 24V to 12V/3.4A conversion. Reverse input connection, output over-current protection, output over-voltage protection, input inrush current limiting circuit are integrated in this board. With wide 9-36V input voltage range, over 89.5 (...)
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Non-Standard PoE, UPOE High-Efficiency Flyback Converter Reference Design for PoE PD Applications
TIDA-00741 TIDA-00741 uses two TPS2378 PD controllers for a forced 4-pair UPOE solution to 51W non-standard PoE PD applications. It incorportates the UCC2897A controller in a high-efficiency, great transient response (driven) synch flyback converter capble of 12V at 3.8A.
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REFERENCE DESIGNS Download
56W Active Clamp for Telecom Apps Reference Design
PMP10202 This reference design provides 28V out of 48V input voltage to supply noise sensitive loads
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REFERENCE DESIGNS Download
18Vdc-60Vdc Input, 3.3V/15A Active Clamp Forward, 1/8 Brick Reference Design
PMP8973 The PMP8973 reference design generates a 3.3V/15A output from an 18V to 60V telecom input. The UCC2897A controls an active clamp forward converter power stage. The low gate charge and low RDSon of the CSD16415Q5 and CSD18502Q5B, implemented as synchronous rectifiers, provides for a highly efficient (...)
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REFERENCE DESIGNS Download
8V-36V Input 12V/7A; Active Clamp Forward Reference Design
PMP5123 This reference design generates an isolated 12V/7A output from an 8V to 36V DC input.  The UCC2897A controls an active clamp forward converter power stage.  The low gate charge and low RDSon of the CSD19533Q5A and CSD19534Q5A allow this design to achieve a max load efficiency over 93 (...)
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REFERENCE DESIGNS Download
UPOE High-Efficiency Flyback Converter (19V/2.3A) for Forced 4-Pair PoE PD Apps Reference Design
TIDA-00539 TIDA-00539 uses two TPS2378 PD controllers for a forced 4-pair UPOE solution to 51W non-standard PoE PD applications. It incorportates the UCC2897A controller in a high-efficiency, great transient response (driven) synch flyback converter capble of 19V at 2.3A.
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REFERENCE DESIGNS Download
18-36VDCin, 5V/4A Active Clamp Reference Design
PMP10871 The PMP10871 reference design uses the UCC2897A to control an active clamp forward and converts an 18-36V input to an isolated 5V/4A output with efficiency over 92%.  This compact design uses only surface mount components.
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REFERENCE DESIGNS Download
High Efficiency 100W Active Clamp Forward 220V-400VDC Input, 28V/ 3.6A Reference Design
PMP7453 This reference design generates an isolated 28V/100W output from a high voltage DC input. This design is intended to operate from the output of PFC front end regulator. The UCC2897A is used to control an active clamp forward converter. Self-driven synchronous rectifiers allow for over 92 (...)
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REFERENCE DESIGNS Download
36V-72Vdc Input, 12V/200W Active Clamp Forward - Reference Design
PMP3162 This reference design generates a 12V/16A output from a standard 48V DC telecom input.  The UCC2897A controls an active clamp forward converter power stage.  The low gate charge and low RDSon of the CSD19533Q51, implemented as self-driven synchronous rectifiers, allow this design to (...)
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REFERENCE DESIGNS Download
18-60VDCin, 6V/31A Active Clamp Forward Reference Design
PMP10395 This reference design generates a 6V/31A output from a wide range 18V to 60V DC telecom input.  The UCC2897A controls an active clamp forward converter power stage.  The low gate charge and low RDSon of the CSD18540Q5B, implemented as self-driven synchronous rectifiers, allow this design (...)
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REFERENCE DESIGNS Download
48V-60Vdc Input, 12V/150W Active Clamp Forward - Reference Design
PMP9720 This reference design generates a 12V/13A output from 54V DC input.  The UCC2897A controls an active clamp forward converter power stage.  The low gate charge and low RDSon of the CSD18532Q5B, implemented as self-driven synchronous rectifiers, allow this design to achieve a max load (...)
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REFERENCE DESIGNS Download
36V-75Vdc Input, 5V/50W 1/8 Brick Active Clamp Forward Reference Design
PMP9108 This reference design generates a 5V/10A output from a standard telecom 48V DC input. The UCC2897A controls an active clamp forward converter power stage. The low gate charge and low RDSon of the CSD17309Q3 and CSD18540Q5B, implemented as self-driven synchronous rectifiers, allow this design to (...)
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REFERENCE DESIGNS Download
36V-75VDC Input, 12V/10A Active Clamp Forward, 1/8th Brick Reference Design
PMP7451 This reference design generates a 12V/10A output from a standard 48V telecom input. The UCC2897A controls an active clamp forward converter power stage. The low gate charge and low RDSon of the CSD18531Q5A, implemented as self-driven synchronous rectifiers, provide for a highly efficient design (...)
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REFERENCE DESIGNS Download
Non-Standard (>25.5W) PoE - High Efficiency Forward Converter (12V@5A) Reference Design
PMP7499 This converter provides a high power PoE output of 12V/5A. The TPS2379 PD controller allows the use of an external hot swap FET for increased efficiency. The UCC2897A PWM controller is used to implement a high efficiency active clamp forward converter.
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
220V-400VDC Input, 12V/100W Active Clamp Forward Reference Design
PMP6961 This reference design generates an isolated 12V/100W output from a high voltage DC input. This design is intended to operate from the output of a PFC front end regulator. The UCC2897A is used to control an active clamp forward converter. Self-driven synchronous rectifiers allow for over 91 (...)
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REFERENCE DESIGNS Download
Telecom Bus Converter for Module Replacement
PMP5711 Highest performance, highest power 175W telecom active clamp forward, 5V @35A w/ lowest form factor
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36 to 75Vin 22V-32V/5A Output Active Clamp Forward Reference Design
PMP9127 This reference design generates a 28V/5A output from a 36V to 75V telecom input. The UCC2897A controls an active clamp forward converter power stage. The output is adjustable within a 22V to 32V range.  The UCC27511 is used to drive synchronous rectifiers, and provides for a highly efficient (...)
REFERENCE DESIGNS Download
36 to 75VDC Input 5V/15A Active Clamp Forward 1/8 Brick Form Factor Reference Design
PMP9126 This reference design generates a 5V/15A output from a 36V to 75V telecom input. The UCC2897A controls an active clamp forward converter power stage. The low gate charge and low RDSon of the CSD17501Q5A and CSD18502Q5B, implemented as a synchronous rectifiers, provides for a highly efficient design (...)
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REFERENCE DESIGNS Download
19 to 30Vin 12V@10A Active Clamp Forward Reference Design
PMP8866 — This reference design provides an isolated 12V at 10A from a 19V-30V input with greater than 93% efficiency. This design uses the UCC2897A active clamp controller with CSD18532Q5B synchronous rectifiers for an efficient, yet cost effective solution that can operate from a 24VDC input bus.
REFERENCE DESIGNS Download
18V-30V Input 24V@6.25A Active Clamp Forward Reference Design
PMP8944 — This reference design provides a regulated and isolated 24Vdc at 150W from an 18Vdc-60Vdc input with greater than 94% efficiency. This design uses the UCC2897A active clamp controller with synchronous rectifiers for an efficient, yet cost effective solution.
REFERENCE DESIGNS Download
36Vdc-75Vdc Input, 20V @ 4A Output, Active Clamp Forward
PMP3799 — The PMP3799 reference design provides an adjustible 20V output at 4A from a standard 48V telecom input with greater than 93% efficiency. This design uses the UCC2897A active clamp controller along with an ISO721 digital isolator and TPS28225 to drive synchronous rectifiers. The output voltage can be (...)
REFERENCE DESIGNS Download
18Vdc-54Vdc Input, 24V @ 5A Output, Active Clamp Forward
PMP4844 — The PMP4844 reference design provides an isolated 24V output at 120W from an 18V to 54V telecom input with up to 94% efficiency. This design uses the UCC2897A active clamp controller along with an ISO721 digital isolator and TPS28225 to drive synchronous rectifiers. The circuit is built in an (...)
REFERENCE DESIGNS Download
18V-75V Input, 12V@12A Active Clamp Forward
PMP8380 — This reference design provides 12V at 12A from a wide range 18V-75V telecom input with greater than 94% efficiency. This design uses the UCC2897A active clamp controller with synchronous rectifiers for an efficient, yet cost effective solution that can operate from either a 24VDC or 48VDC input bus (...)
Design files
REFERENCE DESIGNS Download
Active Clamp Forward Quarter Brick (18 to 60Vdc Input 3.3V/12A) Reference Design
PMP8790 — This reference design generates a 3.3V/12A output from a wide 18V-60V telecom input. The UCC2897A controls an active clamp forward converter power stage. The low gate charge and low RDSon of the CSD17501Q5A and CSD18502Q5B, implemented as self-driven synchronous rectifiers, provide for an efficient (...)
REFERENCE DESIGNS Download
36V-75VDC Input, 5V/20A Active Clamp Forward, 1/8th Brick Reference Design
PMP8366 This reference design generates a 5V/20A output from a standard 48V telecom input. The UCC2897A controls an active clamp forward converter power stage. The low gate charge and low RDSon of the CSD17312Q5, implemented as self-driven synchronous rectifiers, provide for a highly efficient design. This (...)
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REFERENCE DESIGNS Download
18Vdc-60Vdc Input, 3.3V @ 30A Output, 93% Efficient Active Clamp Forward
PMP8252 — The PMP8252 reference design provides 3.3V at 30A from a wide range 18V-60V telecom input with a peak efficiency that is greater than 93%. This design uses the UCC2897A active clamp controller along with Texas Instruments' NexFET power MOSFETs for synchronous rectification.
REFERENCE DESIGNS Download
220V-400VDC Input, 5V/100W Active Clamp Forward Reference Design
PMP7413 This reference design generates an isolated 5V/100W output from a high voltage DC input. This design is intended to operate from the output of a PFC front end regulator. The UCC2897A is used to control an active clamp forward converter. Self-driven synchronous rectifiers allow for 91% efficiency. An (...)
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36V-72VDC Input Active Clamp Forward With Dual 12V/50W Outputs
PMP4028 — This power supply design generates a 12V/100W isolated output from a standard 48V telecom input. An active clamp forward converter is controlled by the UCC2897A. The INA202 and an external PFET are used to provide a current limited 12V/4.5A output derived from the main 12V output of the forward (...)
REFERENCE DESIGNS Download
38Vdc-60Vdc Input, 6V @ 20A Output, Active Clamp Forward
PMP4074 — The PMP4074 reference design provides 6V at 120W from a 48V telecom input with 94% efficiency. This design uses the UCC2897A active clamp controller along with self-driven synchronous rectifiers. This design includes a remote sense function for improved voltage regulation at the point of load.
REFERENCE DESIGNS Download
52V-60Vdc Input, 12V/22A Active Clamp Forward
PMP7376 This reference design generates a 12V/21.7A output from 54V DC input. The UCC2897A controls an active clamp forward converter power stage. The low gate charge and low RDSon of the CSD18531Q5A, implemented as self-driven synchronous rectifiers, allow this design to achieve a max load efficiency of (...)
REFERENCE DESIGNS Download
220V-400VDC Input, 12V/160W Active Clamp Forward
PMP7410 — This reference design generates an isolated 12V/160W output from a high voltage DC input. This design is intended to operate from the output of PFC front end regulator. The UCC2897A is used to control an active clamp forward converter. Texas Instruments CSD18531Q5A synchronous rectifiers allow this (...)
REFERENCE DESIGNS Download
36Vdc-75Vdc Input, 6V @ 20A Output, Active Clamp Forward
PMP4123 — The PMP4123 reference design provides 6V at 120W from a standard 48V telecom input with greater than 94% efficiency. This design uses the UCC2897A active clamp controller along with an ISO721 digital isolator and TPS28225 to drive synchronous rectifiers. The circuit is built in an industry standard (...)
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18Vdc-60Vdc Input, 9.6V @ 15A Output, 94% Efficient Active Clamp Forward
PMP6933 — The PMP6933 reference design provides 9.6V at 15.6A (150W) from a wide range 18V-60V telecom input with greater than 94% efficiency. This design uses the UCC2897A active clamp controller with self-driven synchronous rectifiers to achieve high efficiency.
REFERENCE DESIGNS Download
17VDC-32VDC Input, 3.3V/10W Active Clamp Forward
PMP7357 — This reference designs creates a 3.3V/3.5A isolated output from a 17Vdc to 32Vdc input using the UCC2897A to control an active clamp forward converter. Only ceramic capacitors are used in this design, ensuring a very high reliability rate. Two CSD16409Q3 NexFETs are used for synchronous (...)
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36Vdc-72Vdc Input, 1.2V/25A Active Clamp Forward
PMP6912 — This reference design generates a 1.2V/25A output from a standard 48V telecom input. The UCC2897A controls an active clamp forward converter power stage. The low gate thresholds of the CSD16401Q5 and CSD16325Q5 allow these devices to be used as self-driven synchronous rectifiers for a highly (...)
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36VDC-75VDC Input, 3.3V/30A 1/8th Brick Active Clamp Forward
PMP4234 — This reference design generates an isolated 3.3V/10A output from a standard 48V telecom bus input. The UCC2897A is used to control an active clamp forward topology with self-driven synchronous rectifiers. The electrical components fit into the area of a standard 1/8th brick footprint. Peak (...)
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55V to 90V DC Input, 5V/10A Active Clamp Forward
PMP4751 — This reference design uses the UCC2897A active clamp controller to generate an isolated 5V/50W output from a 55V to 90V input. Synchronous rectifiers allow this converter to achieve efficiencies up to 93%.
REFERENCE DESIGNS Download
55V-90VDC Input, 12V/5A Active Clamp Forward
PMP4752 — This reference design uses the UCC2897A active clamp controller to generate an isolated 12V/60W output from a 55V to 90V input. Synchronous rectifiers allow this converter to achieve efficiencies up to 93%.
REFERENCE DESIGNS Download
Low Cost Negative Input (-48V) Forward Converter (3.3V@15A) for PoE Powered Device (PD)
PMP7094 — This low cost Active Clamp Forward Converter shows best efficiency by easiest direct driven synchronuous rectifiers.
REFERENCE DESIGNS Download
18Vdc-36Vdc Input, 28V/100W Active Clamp Forward Reference Design
PMP7294 This reference design uses the UCC2897A active clamp controller to generate an isolated 28V/3.6A output from a standard 24Vdc telecom input. This design uses diode rectification on the output stage and achieves efficiencies up to 93%. The output is adjustable down to 24V by changing a single (...)
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36V-72V Input 5V, 20A 95% Efficient Active Clamp Forward 1/4 Brick Power Reference Design
PMP5364 The PMP5364 reference design provides 5V at 20A (100W) from a standard 48V telecom input with up to 95% efficiency. This design uses the UCC2897A active clamp controller along with TI NexFET synchronous rectifiers. The low Rdson of the CSD17301Q5A reduces conduction losses and die area of the (...)
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36V-72V Input 12V/9A; 95% Efficient Active Clamp Forward
PMP5426 — The PMP5426 reference design provides 12V at 9A from a standard 48V telecom input with greater than 95% efficiency. This design uses the UCC2897A active clamp controller with self-driven synchronous rectifiers to achieve very high efficiency.
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18V-36V Input 5V/15A; 94% Efficient Active Clamp
PMP5117 — The PMP5117 reference design provides an isolated 5V at 15A from a 18V to 36V input range. This design uses the UCC2897A active clamp controller along with Texas Instruments' NexFET technology, CSD16321Q5, synchronous rectifiers to achieve up to 94% efficiency.
Design files
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Wide input 18V to 75V, 3.3V @ 20Amax
PMP7032 — wide input range 4:1 telecom active clamp forward 3V3 bus converter that provides I/O voltage up to 20Amps peak
Design files
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36V to 75V input, 26V to 33V output @ 1A
PMP7004 — 30W telecom active clamp forward converter w/ 4-bit VID i/f to modulate output voltage in a range 26Vdc to 33Vdc
Design files
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Negative 48Vin, 3.3V @ 14A out
PMP4523 — This is a tiny isolated active clamp forward converter for telecom use, output 3.3V @14A with simply direct driven secondary gate control.
Design files
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36V-72V Input 3.3V/15A 92% Efficient Active Clamp Forward
PMP5454 — The PMP5454 reference design provides 3.3V at 50W (15A) from a standard 48V telecom input with greater than 92% efficiency. This design uses the UCC2897A active clamp controller along with TI CSD16414Q5 NexFET synchronous rectifiers. All components of this design fit within a 2.3" by 0.9" (1/8 (...)
Design files
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"18V-36V Input 6V/100W 95% Efficient Active Clamp Forward
PMP6942 — The PMP6942 reference design provides 6V at 100W (17A) from a standard 24V telecom input with greater than 94% efficiency. This design uses the UCC2897A active clamp controller along with the TI CSD17312Q5 NexFET synchronous rectifier.
Design files
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36V-72V Input 2.5V/5A Active Clamp Forward; 1/16 Brick
PMP6886 — The PMP6886 reference design provides 2.5V at 5A from a standard 48V telecom input with greater than 88% efficiency. This design uses the UCC2897A active clamp controller along with TI NexFET synchronous rectifiers. The low gate thresholds of the CSD16323Q3 and CSD16406Q3 allow them to be driven (...)
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High Efficiency Forward Converter (12V@7A) for PoE Powered Device (PD)
PMP5124 The PMP5124 reference design provides 12V at 7A from a 48V telecom input with greater than 95% efficiency. This design uses the UCC2897A active clamp controller with self-driven synchronous rectifiers to achieve very high efficiency.
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18Vdc-30Vdc Input, 20V @ 4.5A Output, 94% Efficient Active Clamp Forward
PMP6797 — The PMP6797 reference design provides an isolated 20V at 4.5A from an 18V-30V input with greater than 94% efficiency. This design uses the UCC2897A active clamp controller with self-driven synchronous rectifiers.
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36Vdc-75Vdc Input, 5V @ 25A Output, 94% Efficient Active Clamp Forward
PMP5753 — The PMP5753 reference design provides 5V at 125W from a standard 48V telecom input with greater than 94% efficiency. This design uses the UCC2897A active clamp controller along with self-driven synchronous rectifiers. Texas Instruments NexFET technology is used for the synchronous rectifiers (...)
Design files
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18Vdc-60Vdc Input, 3.3V @ 25A Output, 94% Efficient Active Clamp Forward
PMP6753 — The PMP6753 reference design provides 3.3V at 25A from a wide range 18V-60V telecom input with greater than 94% efficiency. This design uses the UCC2897A active clamp controller along with Texas Instruments' NexFET power MOSFETs for synchronous rectification.
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120VAC Input 14V/5A Active Clamp Forward
PMP6661 — This reference design uses the UCC2897A active clamp controller to generate an isolated 14V output at 70W from a US line AC input. This design is over 90% efficient and fits in a 51mm X 66mm X 30mm (2.0” X 2.6” X 1.2”) volume.
Design files
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18V-60V Input, 12V@10A Active Clamp Forward
PMP6547 — This reference design provides 12V at 10A from a wide range 18V-60V telecom input with greater than 93% efficiency. This design uses the UCC2897A active clamp controller with synchronous rectifiers for an efficient, yet cost effective solution that can operate from either a 24VDC or 48VDC input bus (...)
Design files
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48V Input 3.3V/30A with Output Pre-bias
PMP5997 — This reference design generates a 3.3V/100W output from a standard 48V telecom input and allows for a pre-biased output. The UCC2897A controls operation of the active clamp power stage. The drive signal for the synchronous rectifiers is sent to the secondary side through an ISO7220 digital isolator (...)
Design files
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36Vdc-75Vdc Input, 5V @ 25A Output, 93% Efficient Active Clamp Forward
PMP4962 — The PMP4962 reference design provides 5V at 125W from a standard 48V telecom input with greater than 93% efficiency. This design uses the UCC2897A active clamp controller along with self-driven synchronous rectifiers. The output voltage can be adjusted up to 7V.
Design files
REFERENCE DESIGNS Download
36Vdc-60Vdc Input, 18V @ 6A Output, 95% Efficient Active Clamp Forward
PMP4925 — The PMP4925 reference design provides 18V at 110W from a standard 48V telecom input with greater than 95% efficiency. This design uses the UCC2897A active clamp controller along with self-driven synchronous rectifiers.
Design files
REFERENCE DESIGNS Download
REFERENCE DESIGNS Download
48V Input, 3.3V/30A Output, 94% Efficient Active Clamp Forward
PMP4804 — The PMP4804 reference design provides 3.3V at 100W from a standard 48V telecom input with greater than 94% efficiency. This design uses the UCC2897A active clamp controller along with the CSD16401Q5A synchronous rectifiers. The circuit is built in an industry standard Quarter-Brick footprint.
Design files

CAD/CAE symbols

Package Pins Download
QFN (RGP) 20 View options
TSSOP (PW) 20 View options

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