Product details

Topology Flyback, Boost, Buck, SEPIC, Forward Duty cycle (Max) (%) 100 Supply voltage (Max) (V) 18 UVLO thresholds on/off (V) 8.4/7.6 Features Adjustable Switching Frequency, Current Limiting, Dead Time Control, Error Amplifier, Programmable Max Duty Cycle Operating temperature range (C) 125 to -40 Rating Automotive Frequency (Max) (kHz) 1000 Gate drive (Typ) (A) 1
Topology Flyback, Boost, Buck, SEPIC, Forward Duty cycle (Max) (%) 100 Supply voltage (Max) (V) 18 UVLO thresholds on/off (V) 8.4/7.6 Features Adjustable Switching Frequency, Current Limiting, Dead Time Control, Error Amplifier, Programmable Max Duty Cycle Operating temperature range (C) 125 to -40 Rating Automotive Frequency (Max) (kHz) 1000 Gate drive (Typ) (A) 1
SOIC (D) 8 19 mm² 4.9 x 3.9
  • 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
  • 1-MHz operation
  • 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
  • 1-MHz operation
  • 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. F) PDF | HTML 05 Oct 2020
Functional safety information UCC28C4x-Q1 Functional Safety FIT rate, FMD, Pin FMA PDF | HTML 12 Nov 2020
Application note Increase Traction Inverter System Robustness With a HV to LV Backup Supply (Rev. B) 09 Oct 2019
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.

Simulation model

UCC28C43 PSpice Transient Model UCC28C43 PSpice Transient Model

Simulation model

UCC28C43 TINA-TI Start-Up Reference Design UCC28C43 TINA-TI Start-Up Reference Design

Simulation model

UCC28C43 TINA-TI Steady-State Reference Design UCC28C43 TINA-TI Steady-State Reference Design

Simulation model

UCC28C43 TINA-TI Start-Up Spice Model UCC28C43 TINA-TI Start-Up Spice Model

Simulation model

UCC28C43 TINA-TI Steady-State Spice Model UCC28C43 TINA-TI Steady-State Spice Model

Simulation model

UCCx8C43 Unencrypted PSpice Transient Model UCCx8C43 Unencrypted PSpice Transient Model

Reference designs

TIDA-01505 — Automotive 40-V to 1-kV input flyback reference design supporting regenerative braking test

This power supply reference design for automotive auxiliary circuits generates a 15-V, 4-A output from a wide input range of 40 V to 1 kV and up to a 1.2-kV transient. The design fits ideally into an 800-V batterydriven hybrid-electric vehicle (HEV) or electric vehicle(EV) traction inverter (...)
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 (...)
Package Pins Download
SOIC (D) 8 View options

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