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UCC28C42-Q1

ACTIVE

Automotive, 20-V, low-power current-mode PWM controller, 14.5-V/9-V UVLO, 100% duty cycle

A newer version of this product is available

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Drop-in replacement with upgraded functionality to the compared device
UCC28C52-Q1 ACTIVE Automotive, 30-V, low-power current-mode PWM controller, 14.5-V/9-V UVLO, 100% duty cycle Higher supply voltage, lower start-up and operating current, and better efficiency.

Product details

Topology Boost, Buck, Flyback, Forward, SEPIC Control mode Current Duty cycle (max) (%) 100 Switching frequency (max) (kHz) 1000 Features Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Multi-topology, Programmable max duty cycle UVLO thresholds on/off (V) 14.5/9 Operating temperature range (°C) -40 to 125 Rating Automotive Gate drive (typ) (A) 1 Vin (max) (V) 18 TI functional safety category Functional Safety-Capable
Topology Boost, Buck, Flyback, Forward, SEPIC Control mode Current Duty cycle (max) (%) 100 Switching frequency (max) (kHz) 1000 Features Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Multi-topology, Programmable max duty cycle UVLO thresholds on/off (V) 14.5/9 Operating temperature range (°C) -40 to 125 Rating Automotive Gate drive (typ) (A) 1 Vin (max) (V) 18 TI functional safety category Functional Safety-Capable
SOIC (D) 8 29.4 mm² 4.9 x 6
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: -40⁰C to 125⁰C
    • Device HBM classification level 2: ±2 kV
    • Device CDM classification level C4B: 750 V
  • Functional Safety-Capable
  • Operating frequency: 1 MHz Maximum
  • 50-µA standby current, 100-µA maximum
  • Low operating current of 2.3 mA at 52 kHz
  • Fast 35-ns cycle-by-cycle over-current limiting
  • ±1-A peak output current
  • Rail-to-rail output swings with 25-ns rise and 20-ns fall times
  • ±1% initial trimmed 2.5-V error amplifier reference
  • Trimmed oscillator discharge current
  • New undervoltage lockout versions
  • Create a custom design using the UCC28C4x-Q1 with the WEBENCH Power Designer
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: -40⁰C to 125⁰C
    • Device HBM classification level 2: ±2 kV
    • Device CDM classification level C4B: 750 V
  • Functional Safety-Capable
  • Operating frequency: 1 MHz Maximum
  • 50-µA standby current, 100-µA maximum
  • Low operating current of 2.3 mA at 52 kHz
  • Fast 35-ns cycle-by-cycle over-current limiting
  • ±1-A peak output current
  • Rail-to-rail output swings with 25-ns rise and 20-ns fall times
  • ±1% initial trimmed 2.5-V error amplifier reference
  • Trimmed oscillator discharge current
  • New undervoltage lockout versions
  • Create a custom design using the UCC28C4x-Q1 with the WEBENCH Power Designer

The UCC28C4x-Q1 family devices are high performance current-mode PWM controllers.

The UCC28C4x-Q1 family supports a fixed-frequency, peak current-mode flyback implementation with UVLO and maximum duty-cycle limit options. UCC28C4X-Q1 can be configured with either primary-side regulation using an auxiliary winding or secondary-side regulation with the use of an opto-coupler. This family of devices features high frequency operation up to 1 MHz with low start up and operating currents, thus minimizing start up loss and operating power consumption for improved efficiency. The devices also feature a fast current sense to output delay time of 35 ns, and a ±1-A peak output current capability for driving large external MOSFETs directly.

The UCC28C4x-Q1 family is offered in the 8-pin SOIC (D) package.

The UCC28C4x-Q1 family devices are high performance current-mode PWM controllers.

The UCC28C4x-Q1 family supports a fixed-frequency, peak current-mode flyback implementation with UVLO and maximum duty-cycle limit options. UCC28C4X-Q1 can be configured with either primary-side regulation using an auxiliary winding or secondary-side regulation with the use of an opto-coupler. This family of devices features high frequency operation up to 1 MHz with low start up and operating currents, thus minimizing start up loss and operating power consumption for improved efficiency. The devices also feature a fast current sense to output delay time of 35 ns, and a ±1-A peak output current capability for driving large external MOSFETs directly.

The UCC28C4x-Q1 family is offered in the 8-pin SOIC (D) package.

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Technical documentation

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Type Title Date
* Data sheet UCC28C4x-Q1 Automotive BiCMOS Low-Power Current-Mode PWM Controllers datasheet (Rev. G) PDF | HTML 12 Sep 2022
Application brief Designing a Robust Traction Inverter Redundant Power Supply From 800 V Battery (Rev. C) PDF | HTML 16 Feb 2023
Functional safety information UCC28C4x-Q1 Functional Safety FIT rate, FMD, Pin FMA (Rev. A) PDF | HTML 14 Sep 2022
Selection guide UCC28C4X-Q1 selection guide for automotive isolated DC/DC aux power applications 07 Jun 2019

Design & development

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

Evaluation board

UCC28C56EVM-066 — UCC28C56H-Q1 evaluation module for primary-side controlled (with AUX winding) flyback regulator

The UCC28C56EVM-066 is a highly efficient primary-side controlled (with AUX winding) flyback auxiliary power supply for EV and HEV automotive power trains. The design provides 15.2-VTYP, 40-W output for 800-V battery systems. It will deliver 40 W over the input voltage range from 125 V to 1000 V. (...)

User guide: PDF | HTML
Not available on TI.com
Simulation model

UCC28C42 PSpice Transient Model

SLVM049.ZIP (101 KB) - PSpice Model
Simulation model

UCC28C42 TINA-TI Transient Start-up Reference Design

SLVM045.TSC (70 KB) - TINA-TI Reference Design
Simulation model

UCC28C42 TINA-TI Transient Start-up Spice Model

SLVM047.TSM (9 KB) - TINA-TI Spice Model
Simulation model

UCC28C42 TINA-TI Transient Steady State Reference Design

SLVM046.TSC (70 KB) - TINA-TI Reference Design
Simulation model

UCC28C42 TINA-TI Transient Steady State Spice Model

SLVM048.TSM (9 KB) - TINA-TI Spice Model
Simulation model

UCCx8C42 Unencrypted PSpice Transient Model

SLUM522.ZIP (4 KB) - PSpice Model
Reference designs

PMP30720 — High efficiency, ultra-wide input (20 VDC to 375 VDC) isolated power supply reference design

This reference design uses the UCC28C42 boost controller and the UCC28780 active-clamp flyback controller to generate an isolated output of 24 V at 3.5 A over an ultra-wide input voltage range of 20 V to 375 V. The design also uses the UCC24612 synchronous rectifier controller on the secondary (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP10783 — AC/DC Buck Converter with 85VAC - 318VAC Input and 15V at 0.8A Output Reference Design

The PMP10783 reference design is an AC/DC buck converter. The input voltage range is 85VAC-318VAC, and has an output of 15V at 0.80A. This compact board design has an efficiency of greater than 80% at full load.
Test report: PDF
Schematic: PDF
Reference designs

PMP10833 — 85-318Vin, 15Vout, 1Aout, AC-DC Buck Converter Reference Design

The PMP10833RevA reference design is a compact and thermally efficient design intended to step down a wide range of AC inputs.  This design incorporates the UCC28C42, a current-mode PWM controller, with controllable frequencies up to 1Mhz.
Test report: PDF
Schematic: PDF
Reference designs

PMP10834 — 85-265Vin, 5Vout, 1Aout, AC-DC Fly-Buck Converter Reference Design

The PMP10834RevA reference design is a compact and thermally efficient design intended to step down a wide range of AC inputs (85VAC to 265VAC). This non-isolated Flybuck design incorporates the UCC28C42 PWM with an optocoupler feedback to provide 1% output voltage regulation. All the circuit (...)
Test report: PDF
Schematic: PDF
Package Pins Download
SOIC (D) 8 View options

Ordering & quality

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  • Qualification summary
  • Ongoing reliability monitoring

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