BiCMOS Advanced Phase Shift PWM Controller - UCC3895

UCC3895 (ACTIVE)

BiCMOS Advanced Phase Shift PWM Controller

Recommended alternative parts

  • UCC28950  -  Next Generation Phase-Shifted Full-Bridge Controller with Synchronous Rectification and Light Load Management

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

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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$)
UCC3895 UCC1895 UCC2895
Boost
Buck
Full-Bridge    
Full-Bridge     Full-Bridge    
Current
Feedforward
Voltage    
Current
Feedforward
Voltage    
Current
Feedforward
Voltage    
100     100     100    
1000     1000     1000    
11/9     11/9     11/9    
4     4     4    
Error Amplifier
Green Mode
Light Load Efficiency
Soft Start
Soft Switching
Synchronization Pin    
Error Amplifier
Green Mode
Light Load Efficiency
Soft Start
Soft Switching
Synchronization Pin    
Error Amplifier
Green Mode
Light Load Efficiency
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

Featured tools and software

Companion parts

Part # Name Product Family Comments
UCC27200   120V Boot, 3-A Peak, High Frequency, High-Side/Low-Side Driver   AC/DC AND ISOLATED DC/DC POWER SUPPLY - Gate Driver    The UCC27200 has a boot voltage capability of 120V and when combined with the UCC3895 becomes an ideal solution for intermediate bus architecture converters.  
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