Low-Power BiCMOS Current-Mode PWM - UCC3804

UCC3804 (ACTIVE)

Low-Power BiCMOS Current-Mode PWM

 

Description

The UCCx80x 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 mode power supplies with minimal parts count.

These devices have the same pin configuration as the UCx84x family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.

The UCCx80x 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 UCC2803 and UCC2805 fit best into battery-operated systems, while the higher reference and higher UVLO hysteresis of the UCC2802 and UCC2804 make these ideal choices for use in off-line power supplies.

The UCC180x series is specified for operation from –55°C to 125°C, the UCC280x series is specified for operation from –40°C to 85°C, and the UCC380x 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 up 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 UC3842 and UC3842A

View more

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)
Features
Rating
Operating Temperature Range (C)
Pin/Package
UCC3804 UCC1804 UCC2804
Boost
Buck
Flyback
Forward   
Boost
Flyback
Forward   
Boost
Flyback
Forward   
Current    Current    Current   
12.5    8.3    12.5   
400    12    400   
1000    1000    1000   
12.5/8.3    12.5/8.3    12.5/8.3   
50    50    50   
1    1    1   
Error Amplifier
Leading Edge Blanking
Multi-topology
Soft Start   
Error Amplifier
Leading Edge Blanking
Soft Start   
Error Amplifier
Leading Edge Blanking
Multi-topology
Soft Start   
Catalog    Military    Catalog   
0 to 70    -55 to 125    -40 to 85   
8PDIP
8SOIC
8TSSOP   
8CDIP    8PDIP
8SOIC
8TSSOP   

Other qualified versions of UCC3804

Version Part Number Definition
Military UCC1804 QML certified for Military and Defense Applications

WEBENCH® Designer UCC3804

AC Frequency  60 Hz  50 Hz
  Min   Max Range
VinRMS  V 20.0 to 480.0V
Vout  V 3.3 to 50V
Iout  A ≤ 20A
Ambient Temp  °C 0 to 70°C