Product details

Topology Boost, Flyback, Forward Duty cycle (Max) (%) 50 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) (%) 50 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
PDIP (P) 8 93 mm² 9.81 x 9.43 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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Design & development

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

Simulation model

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

SLUM082B.ZIP (88 KB) - PSpice Model
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
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

Ordering & quality

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Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

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