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UCC3813-4

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Economy low power BICMOS 1MHz current mode PWM with 12.5V/8.3V UVLO, 50% duty cycle, 0C to 70C

Product details

Topology Boost, Flyback Control mode Current Duty cycle (max) (%) 50 Switching frequency (max) (kHz) 1000 Features Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Leading edge blanking, Multi-topology, Soft start UVLO thresholds on/off (V) 12.5/8.3 Operating temperature range (°C) 0 to 70 Rating Catalog Gate drive (typ) (A) 1 Vin (max) (V) 11
Topology Boost, Flyback Control mode Current Duty cycle (max) (%) 50 Switching frequency (max) (kHz) 1000 Features Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Leading edge blanking, Multi-topology, Soft start UVLO thresholds on/off (V) 12.5/8.3 Operating temperature range (°C) 0 to 70 Rating Catalog Gate drive (typ) (A) 1 Vin (max) (V) 11
SOIC (D) 8 29.4 mm² 4.9 x 6 TSSOP (PW) 8 19.2 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

Design & development

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

Simulation model

UCCX804 & UCCx813-4 TINA-TI Startup Reference Design

SLUM226.TSC (666 KB) - TINA-TI Reference Design
Simulation model

UCCX804 & UCCx813-4 TINA-TI Steady State Reference Design

SLUM227.TSC (667 KB) - TINA-TI Reference Design
Simulation model

UCCX804 & UCCx813-4 TINA-TI Transient Spice Model

SLUM228.ZIP (28 KB) - TINA-TI Spice Model
Simulation model

UCCx804 & UCCx813-4 Unencrypted PSpice Transient Model

SLUM515.ZIP (6 KB) - PSpice Model
Simulation model

UCCx804, UCCx813-4 Families PSpice Transient Model (Rev. B)

SLUM082B.ZIP (88 KB) - PSpice Model
Reference designs

PMP23476 — Compact 6W, triple output, auxiliary bias supply reference design

This reference design demonstrates a primary side regulated flyback with two non-isolated 12V outputs and one isolated 12V output. The total size of the bias supply is 24.5mm x 32mm x 17mm.
Test report: PDF
Reference designs

PMP22220 — 1500-W AC switch bridgeless PFC reference design

This reference design is an AC switch bridgeless power factor correction (PFC) that operates with continuous conduction mode (CCM). It takes universal AC-input voltage (90 VAC to 264 VAC), provides 390-V, 1000-W low-line output and 1500-W high-line output. This design uses the UCD3138 digital (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP20306 — 200V to 400V Input (Nominal), Triple-Output Bias Supply with Input Voltage Sensing Reference Design

This reference design is a compact and thermally efficient design intended to be used as a bias supply for half-bridge converters. A DCM Flyback with UCC3813-4 controller is used to generate two isolated 12V supplies for half-bridge converter primary driving circuitry. One 5V is generated at the (...)
Test report: PDF
Schematic: PDF
Package Pins Download
SOIC (D) 8 View options
TSSOP (PW) 8 View options

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