Automotive BiCMOS low-power current-mode PWM controller


Product details


Topology Boost, Buck, Buck-Boost, Flyback, Forward Control method Current VCC (Min) (V) 7 VCC (Max) (V) 18 Duty cycle (Max) (%) 100 UVLO thresholds on/off (V) 7/6.6 Frequency (Max) (kHz) 1000 Operating temperature range (C) -40 to 125 Gate drive (Typ) (A) 1 Features Adjustable Switching Frequency, Current Limiting, Dead Time Control, Error Amplifier, Multi-topology, Programmable Max Duty Cycle Rating Automotive open-in-new Find other PWM controllers & resonant controllers

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 open-in-new Find other PWM controllers & resonant controllers


  • 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

All trademarks are the property of their respective owners.

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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
* Datasheet UCC28C4x-Q1 Automotive BiCMOS Low-Power Current-Mode PWM Controllers datasheet (Rev. F) Oct. 05, 2020
User guide UCC28C4x-Q1 Functional Safety FIT rate, FMD, Pin FMA Nov. 12, 2020
Application note Increase Traction Inverter System Robustness With a HV to LV Backup Supply (Rev. B) Oct. 09, 2019
Selection guide UCC28C4X-Q1 selection guide for automotive isolated DC/DC aux power applications Jun. 07, 2019

Design & development

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

Design tools & simulation

SLUM032.ZIP (101 KB) - PSpice Model
SLUM193.TSC (902 KB) - TINA-TI Reference Design
SLUM194.TSC (662 KB) - TINA-TI Reference Design
SLUM195.ZIP (11 KB) - TINA-TI Spice Model
SLUM196.ZIP (11 KB) - TINA-TI Spice Model
SLUM519.ZIP (4 KB) - PSpice Model

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options

Ordering & quality

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  • MSL rating/Peak reflow
  • MTBF/FIT estimates
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  • Qualification summary
  • Ongoing reliability monitoring

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