Compact Primary-side Regulation PWM Controller with Automotive Grade - UCC28700-Q1

UCC28700-Q1 (ACTIVE)

Compact Primary-side Regulation PWM Controller with Automotive Grade

 

Description

The UCC28700-Q1 of flyback power supply controllers provides Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. The devices process information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current. Low start-up current, dynamically controlled operating states and a tailored modulation profile support very low standby power without sacrificing start-up time or output transient response.

Control algorithms in the UCC28700-Q1 allows operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a MOSFET power switch. Discontinuous Conduction Mode (DCM) with valley switching reduces switching losses. Modulation of switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.

The controllers have a maximum switching frequency of 130 kHz and always maintain control of the peak-primary current in the transformer. Protection features help keep primary and secondary component stresses in check. The UCC28700-Q1 allows the level of cable compensation to be programmed.

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified with the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C
    • Device HBM Classification Level 2: ±2 kV
    • Device CDM Classification Level C4B: 750 V
  • < 30-mW Standby Power Consumption
  • Primary-Side Regulation (PSR) Eliminates Opto-Coupler
  • ±5% Voltage and Current Regulation
  • 130-kHz Maximum Switching Frequency
  • Quasi-Resonant Valley-Switching Operation for Highest Overall Efficiency
  • Patent-Pending Frequency-Jitter Scheme to Ease EMI Compliance
  • Wide VDD Range Allows Small Bias Capacitor
  • Clamped Gate-Drive Output for MOSFET
  • Protection Functions: Overvoltage, Low-Line, and Overcurrent
  • Programmable Cable Compensation
  • SOT23-6 Package

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Parametrics Compare all products in Flyback Controller

 
Control Method
Duty Cycle (Max) (%)
Frequency (Max) (kHz)
UVLO Thresholds On/Off (V)
Features
Operating Temperature Range (C)
Package Group
Rating
Package Size: mm2:W x L (PKG)
UCC28700-Q1 LM5021-Q1 UCC28600-Q1 UCC28730-Q1
Current    Current    Current    Current   
99    80    99    99   
132    1000    130    83   
21/8    20/7.25    10.3/9.3    21/7   
PSR
Adjustable CBC
CV/CC Control
DCM
Low Power
Light Load Efficiency
Error Amplifier
Soft Switching
Current Limiting
Thermal Shutdown
Green Mode
Input Line Monitor
Leading Edge Blanking
Automotive   
SSR
DCM
CCM
Frequency Synchronization
Automotive   
SSR
QR/TM
Error Amplifier
Green Mode
Light Load Efficiency
Automotive   
PSR
HV Start-up
Low Power
Adjustable CBC
CV/CC Control
DCM
Light Load Efficiency
Soft Switching
Current Limiting
Thermal Shutdown
Green Mode
Input Line Monitor
Leading Edge Blanking
Soft Start
IoT Compatible
Power Delivery Compatible   
-40 to 125    -40 to 125    -40 to 105    -40 to 125   
SOT-23    VSSOP    SOIC    SOIC   
Automotive    Automotive    Automotive    Automotive   
6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)    8VSSOP: 15 mm2: 4.9 x 3(VSSOP)    8SOIC: 29 mm2: 6 x 4.9(SOIC)    7SOIC: 29 mm2: 6 x 4.9(SOIC)   

Other qualified versions of UCC28700-Q1

Version Part Number Definition
Catalog UCC28700 TI's standard catalog product

WEBENCH® Designer UCC28700-Q1

 AC  DC  
AC Frequency  60 Hz  50 Hz
Use Isolated Output?
  Min   Max Range
VinRMS  V 85.00 to 480.00V
Vout  V 3.3 to 25.0V
Iout  A ≤ 10.0A
Ambient Temp  °C -20 to 125°C