Product details

Topology Boost, Flyback, Forward Duty cycle (Max) (%) 100 Supply voltage (Max) (V) 11 UVLO thresholds on/off (V) 12.5/8.3 Features Adjustable Switching Frequency, Current Limiting, Dead Time Control, Error Amplifier, Leading Edge Blanking, Multi-topology, Soft Start Operating temperature range (C) -40 to 85 Rating Catalog Frequency (Max) (kHz) 1000 Gate drive (Typ) (A) 1
Topology Boost, Flyback, Forward Duty cycle (Max) (%) 100 Supply voltage (Max) (V) 11 UVLO thresholds on/off (V) 12.5/8.3 Features Adjustable Switching Frequency, Current Limiting, Dead Time Control, Error Amplifier, Leading Edge Blanking, Multi-topology, Soft Start Operating temperature range (C) -40 to 85 Rating Catalog Frequency (Max) (kHz) 1000 Gate drive (Typ) (A) 1
SOIC (D) 8 19 mm² 3.91 x 4.9 TSSOP (PW) 8 19 mm² 3 x 6.4
  • 100-µA typical starting supply current
  • 500-µA typical operating supply current
  • Operation to 1 MHz
  • Internal soft start
  • Internal fault soft start
  • Internal leading-edge blanking of the current-sense signal
  • 1-A totem-pole output
  • 70-ns typical response from current-sense to gate-drive output
  • 1.5% Tolerance Voltage Reference
  • Same Pinout as the UCC3802 device, UC3842 device, and UC3842A device families
  • 100-µA typical starting supply current
  • 500-µA typical operating supply current
  • Operation to 1 MHz
  • Internal soft start
  • Internal fault soft start
  • Internal leading-edge blanking of the current-sense signal
  • 1-A totem-pole output
  • 70-ns typical response from current-sense to gate-drive output
  • 1.5% Tolerance Voltage Reference
  • Same Pinout as the UCC3802 device, UC3842 device, and UC3842A device families

The UCC3813-x device family of high-speed, low-power integrated circuits contains all of the control and drive components required for off-line and DC-to-DC fixed-frequency current-mode switching power supplies with minimal parts count.

These devices have the same pin configuration as the UC384x device family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.

The UCC3813-x device family offers a variety of package options, temperature-range options, choice of maximum duty cycle, and choice of critical voltage levels. Devices with lower reference voltage such as the UCC3813-3 and UCC3813-5 fit best into battery operated systems, while the higher reference and the higher UVLO hysteresis of the UCC3813-2 device and UCC3813-4 device make these ideal choices for use in off-line power supplies.

The UCC2813-x device series is specified for operation from –40°C to 85°C and the UCC3813-x device series is specified for operation from 0°C to 70°C.

The UCC3813-x device family of high-speed, low-power integrated circuits contains all of the control and drive components required for off-line and DC-to-DC fixed-frequency current-mode switching power supplies with minimal parts count.

These devices have the same pin configuration as the UC384x device family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.

The UCC3813-x device family offers a variety of package options, temperature-range options, choice of maximum duty cycle, and choice of critical voltage levels. Devices with lower reference voltage such as the UCC3813-3 and UCC3813-5 fit best into battery operated systems, while the higher reference and the higher UVLO hysteresis of the UCC3813-2 device and UCC3813-4 device make these ideal choices for use in off-line power supplies.

The UCC2813-x device series is specified for operation from –40°C to 85°C and the UCC3813-x device series is specified for operation from 0°C to 70°C.

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Technical documentation

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Type Title Date
* Data sheet UCCx813-x Low-Power Economy BiCMOS Current-Mode PWM datasheet (Rev. F) PDF | HTML 12 May 2020
Application note Flyback Selection Guide PDF | HTML 23 Jun 2022
Application note Conditioning a Switch-mode Power Supply Current Signal Using TI Op Amps (Rev. A) PDF | HTML 11 Jun 2021
Application note Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) 12 Mar 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers 07 Feb 2002
Application note Differences Between the UCC3813 and the UCC3800 PWM Families 02 Jun 2000
Application note DN-42A Design Considerations for Transitioning from UC3842 to the New UCC3802 05 Sep 1999
Application note DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode 05 Sep 1999
Application note U-111, Practical Considerations in Current Mode Power Supplies 05 Sep 1999
Application note U-133A UCC3800/1/2/3/4/5 BiCMOS Current Mode Control IC's 05 Sep 1999

Design & development

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

Simulation model

UCCx813-2, UCCx802 Families PSpice Transient Model (Rev. B) UCCx813-2, UCCx802 Families PSpice Transient Model (Rev. B)

Simulation model

UCCX802 & UCCX813-2 TINA-TI Steady State Reference Design UCCX802 & UCCX813-2 TINA-TI Steady State Reference Design

Simulation model

UCCX802 & UCCX813-2 TINA-TI Transient Spice Model UCCX802 & UCCX813-2 TINA-TI Transient Spice Model

Simulation model

UCCX802 & UCCX813-2 TINA-TI Startup Reference Design UCCX802 & UCCX813-2 TINA-TI Startup Reference Design

Simulation model

UCCx802 & UCCx813-2 Unencrypted PSpice Transient Model UCCx802 & UCCx813-2 Unencrypted PSpice Transient Model

Reference designs

PMP2187 — Flyback, Linear Regulator for Medical Pack (5.75V @ 10mA)

This design provides isolated 5V (x2), 3.3V, 2.5V and -5V outputs. All outputs are noise filtered using Low Drop Out (LDO) linear regulators for noise sensitive applications such as medical imaging and data acquisition.
Package Pins Download
PDIP (P) 8 View options
SOIC (D) 8 View options
TSSOP (PW) 8 View options

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