Low Power Economy BiCMOS Current Mode PWM - UCC3813-2

UCC3813-2 (ACTIVE)

Low Power Economy BiCMOS Current Mode PWM

 

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.

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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Parametrics Compare all products in PWM and Resonant Controller

 
Topology
Control Method
Vin (Min) (V)
Vin (Max) (V)
Frequency (Max) (kHz)
UVLO Thresholds On/Off (V)
Duty Cycle (Max) (%)
Gate Drive (Typ) (A)
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   
8.3    8.3   
12    12   
1000    1000   
12.5/8.3    12.5/8.3   
100    100   
1    1   
Error Amplifier
Leading Edge Blanking
Multi-topology
Soft Start   
Error Amplifier
Leading Edge Blanking
Multi-topology
Soft Start   
Catalog    Catalog   
0 to 70    -40 to 85   
8PDIP
8SOIC
8TSSOP   
8PDIP
8SOIC
8TSSOP   
0.99 | 1ku    1.05 | 1ku   

WEBENCH® Designer UCC3813-2

 AC  DC  
AC Frequency  60 Hz  50 Hz
Use Isolated Output?
  Min   Max Range
VinRMS  V 20.00 to 480.00V
Vout  V 3.3 to 50.0V
Iout  A ≤ 20.0A
Ambient Temp  °C 0 to 70°C