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

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Parametrics Compare all products in PWM controllers & resonant controllers

 
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 UCC2807-1 UCC2807-3
Boost
Flyback
Forward    
Boost
Flyback
Forward    
Boost
Flyback
Forward    
Current     Current     Current    
12.5     7.2     4.3    
13.5     13.5     13.5    
1000     1000     1000    
12.5/8.3     7.2/6.9     4.3/4.1    
78     78     78    
1     1     1    
Adjustable Switching Frequency
Error Amplifier
Leading Edge Blanking
Multi-topology
Programmable Max Duty Cycle
Soft Start    
Adjustable Switching Frequency
Error Amplifier
Leading Edge Blanking
Multi-topology
Programmable Max Duty Cycle
Soft Start    
Adjustable Switching Frequency
Error Amplifier
Leading Edge Blanking
Multi-topology
Programmable Max Duty Cycle
Soft Start    
Catalog     Catalog     Catalog    
-40 to 85     -40 to 85     -40 to 85    
SOIC | 8     PDIP | 8
SOIC | 8    
SOIC | 8    
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)     See datasheet (PDIP)
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)    
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)