UCC2813-5

ACTIVE

Economy low power BICMOS 1MHz current mode PWM with 4.1V/3.6V UVLO and 50% duty cycle, -40C to 85C

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Product details

Parameters

Topology Boost, Flyback, Forward Control method Current VCC (Min) (V) 4.1 VCC (Max) (V) 11 Duty cycle (Max) (%) 50 UVLO thresholds on/off (V) 4.1/3.6 Frequency (Max) (kHz) 1000 Operating temperature range (C) -40 to 85 Gate drive (Typ) (A) 1 Features Adjustable Switching Frequency, Current Limiting, Dead Time Control, Error Amplifier, Leading Edge Blanking, Multi-topology, Soft Start Rating Catalog open-in-new Find other PWM controllers & resonant controllers

Package | Pins | Size

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 open-in-new Find other PWM controllers & resonant controllers

Features

  • 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

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Description

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.

Design tools & simulation

SIMULATION MODELS Download
SLUM081B.ZIP (88 KB) - PSpice Model
SIMULATION MODELS Download
SLUM229.ZIP (28 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SLUM230.TSC (668 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLUM231.TSC (667 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLUM516.ZIP (6 KB) - PSpice Model

Reference designs

REFERENCE DESIGNS Download
Flyback, Linear Regulator for Medical Pack (5.75V @ 10mA)
PMP2187 — 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.
Design files
REFERENCE DESIGNS Download
Design files

CAD/CAE symbols

Package Pins Download
PDIP (P) 8 View options
SOIC (D) 8 View options
TSSOP (PW) 8 View options

Ordering & quality

Support & training

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