UCC3807-2

ACTIVE

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

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Product details

Parameters

Topology Boost, Buck, Flyback, Forward Control method Current VCC (Min) (V) 12.5 VCC (Max) (V) 13.5 Duty cycle (Max) (%) 78 UVLO thresholds on/off (V) 12.5/8.3 Frequency (Max) (kHz) 1000 Operating temperature range (C) 0 to 70 Gate drive (Typ) (A) 1 Features 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 open-in-new Find other PWM controllers & resonant controllers

Features

  • User Programmable Maximum PWM Duty Cycle
  • 100-A Startup Current
  • Operation to 1 MHz
  • Internal Full Cycle Soft Start
  • Internal Leading Edge Blanking of Current Sense Signal
  • 1-A Totem Pole Output

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Description

The UCC3807 family of high speed, low power integrated circuits contains all of the control and drive circuitry required for off-line and dc-to-dc fixed frequency current mode switching power supplies with minimal external parts count.

These devices are similar to the UCC3800 family, but with the added feature of a user programmable maximum duty cycle. Oscillator frequency and maximum duty cycle are programmed with two resistors and a capacitor. The UCC3807 family also features internal full cycle soft start and internal leading edge blanking of the current sense input.

The UCC3807 family offers a variety of package options, temperature range options, and choice of critical voltage levels. The family has UVLO thresholds and hysteresis levels for off-line and battery powered systems. Thresholds are shown in the table below.

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Technical documentation

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Type Title Date
* Datasheet Programmable Maximum Duty Cycle PWM Controller datasheet (Rev. B) Oct. 07, 2010
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
More literature UCC3807 Test Report Feb. 19, 2008

Design & development

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Design tools & simulation

SCHEMATIC Download
SLUR022.PDF (68 KB)
BILL OF MATERIALS (BOM) Download
SLUR021.PDF (27 KB)

CAD/CAE symbols

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

Ordering & quality

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