BiCMOS Advanced Phase Shift PWM Controller - UCC3895

UCC3895 (ACTIVE)

BiCMOS Advanced Phase Shift PWM Controller

 

Description

The UCC3895 is a phase-shift PWM controller that implements control of a full-bridge power stage by phase shifting the switching of one half-bridge with respect to the other. The device allows constant frequency pulse-width modulation in conjunction with resonant zero-voltage switching to provide high efficiency at high frequencies. The part is used either as a voltage-mode or current-mode controller.

While the UCC3895 maintains the functionality of the UC3875/6/7/8 family and UC3879, it improves on that controller family with additional features such as enhanced control logic, adaptive delay set, and shutdown capability. Because the device is built using the BCDMOS process, it operates with dramatically less supply current than it’s bipolar counterparts. The UCC3895 operates with a maximum clock frequency of 1 MHz.

Features

  • Programmable-Output Turnon Delay
  • Adaptive Delay Set
  • Bidirectional Oscillator Synchronization
  • Voltage-Mode, Peak Current-Mode, or Average
    Current-Mode Control
  • Programmable Softstart, Softstop and
    Chip Disable via a Single Pin
  • 0% to 100% Duty-Cycle Control
  • 7-MHz Error Amplifier
  • Operation to 1 MHz
  • Typical 5-mA Operating Current at 500 kHz
  • Very Low 150-µA Current During UVLO

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)
Special Features
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
UCC3895 UCC1895 UCC2895
Boost
Buck
Full-Bridge   
Full-Bridge    Full-Bridge   
Current
Feedforward
Voltage   
Current
Feedforward
Voltage   
Current
Feedforward
Voltage   
9    9    9   
17    17    17   
1000    1000    1000   
11/9    11/9    11/9   
100    100    100   
0.1    0.1    0.1   
Error Amplifier
Multi-topology
Soft Start
Soft Switching
Synchronization Pin   
Error Amplifier
Green Mode
Light Load Efficiency
Soft Start
Soft Switching
Synchronization Pin   
Error Amplifier
Multi-topology
Soft Start
Soft Switching
Synchronization Pin   
Catalog    Military    Catalog   
0 to 70    -55 to 125    -40 to 85   
20PDIP
20PLCC
20SOIC
20TSSOP   
20CDIP
20LCCC   
0WAFERSALE
20PDIP
20PLCC
20SOIC
20TSSOP   
2.95 | 1ku      3.10 | 1ku   

Other qualified versions of UCC3895

Version Part Number Definition
Military UCC1895 QML certified for Military and Defense Applications