UCC2807-2 Programmable Maximum Duty Cycle PWM Controller | TI.com

UCC2807-2 (ACTIVE)

Programmable Maximum Duty Cycle PWM Controller

Programmable Maximum Duty Cycle PWM Controller - UCC2807-2
Datasheet
 

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.

Features

  • User Programmable Maximum PWMDuty 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

Parametrics

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Part number Order Topology Control method VCC (Min) (V) VCC (Max) (V) Frequency (Max) (kHz) UVLO thresholds on/off (V) Duty cycle (Max) (%) Gate drive (Typ) (A) Features Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
UCC2807-2 Order now Boost
Flyback
Forward    
Current     12.5     13.5     1000     12.5/8.3     78     1     Adjustable Switching Frequency
Error Amplifier
Leading Edge Blanking
Multi-topology
Programmable Max Duty Cycle
Soft Start    
Catalog     -40 to 85     SOIC | 8     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)    
UCC2807-1 Order now Boost
Flyback
Forward    
Current     7.2     13.5     1000     7.2/6.9     78     1     Adjustable Switching Frequency
Error Amplifier
Leading Edge Blanking
Multi-topology
Programmable Max Duty Cycle
Soft Start    
Catalog     -40 to 85     PDIP | 8
SOIC | 8    
See datasheet (PDIP)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)    
UCC2807-3 Order now Boost
Flyback
Forward    
Current     4.3     13.5     1000     4.3/4.1     78     1     Adjustable Switching Frequency
Error Amplifier
Leading Edge Blanking
Multi-topology
Programmable Max Duty Cycle
Soft Start    
Catalog     -40 to 85     SOIC | 8     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)