Low Power Economy BiCMOS Current Mode PWM - UCC3813-2

UCC3813-2 (ACTIVE)

Low Power Economy BiCMOS Current Mode PWM

Description

The UCC3813-x family of high-speed, low-power integrated circuits contain 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 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 family offers a variety of package options, temperature-range options, choice of maximum duty cycle, and choice of critical voltage levels. Lower reference parts such as the UCC3813-3 and UCC38135 fit best into battery operated systems, while the higher reference and the higher UVLO hysteresis of the UCC3813-2 and UCC3813-4 make these ideal choices for use in off-line power supplies.

The UCC2813-x series is specified for operation from –40°C to +85°C and the UCC3813-x series is specified for operation from 0°C to 70°C.

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 UCC3802, UC3842, and UC3842A

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Parametrics Compare all products in PWM and Resonant Controller

 
Topology
Control Method
Duty Cycle (Max) (%)
Frequency (Max) (kHz)
UVLO Thresholds On/Off (V)
Regulated Outputs (#)
Special Features
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
UCC3813-2 UCC2813-2
Boost
Buck
Flyback
Forward    
Boost
Flyback
Forward    
Current     Current    
100     100    
1000     1000    
12.5/8.3     12.5/8.3    
1     1    
Error Amplifier
Leading Edge Blanking
Soft Start    
Error Amplifier
Leading Edge Blanking
Soft Start    
Catalog     Catalog    
0 to 70     -40 to 85    
8PDIP
8SOIC
8TSSOP    
8PDIP
8SOIC
8TSSOP    
0.99 | 1ku     1.05 | 1ku    
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