Datasheet

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UCC2895
EAN EAP
EAOUT
RAMP
REF
GND
SYNC
CT
RT
DELAB
DELCD ADS
CS
OUTD
OUTC
VCC
PGND
OUTB
OUTA
SS/DISB
Q1
DB
A C
V
IN
V
OUT
V
BIAS
UCC2895-Q1
www.ti.com
SLUS783C MAY 2008REVISED AUGUST 2012
BiCMOS ADVANCED PHASE-SHIFT PWM CONTROLLER
Check for Samples: UCC2895-Q1
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FEATURES
DESCRIPTION
Qualified for Automotive Applications
The UCC2895-Q1 is a phase-shift pulse-width
Programmable Output Turn-On Delay
modulation (PWM) controller that implements control
Bidirectional Oscillator Synchronization
of a full-bridge power stage by phase shifting the
switching of one half-bridge with respect to the other.
Voltage-Mode, Peak-Current-Mode, or
It allows constant-frequency PWM in conjunction with
Average-Current-Mode Control
resonant zero-voltage switching to provide high
Programmable Soft Start/Soft Stop and Chip
efficiency at high frequencies. The device can be
Disable Via a Single Pin
used either as a voltage-mode or current-mode
0% to 100% Duty-Cycle Control
controller.
7-MHz Error Amplifier
Although the UCC2895-Q1 maintains the functionality
Operation to 1 MHz
of the UC3875/6/7/8 family and UC3879, it improves
on that controller family with additional features such
Typical 5-mA Operating Current at 500 kHz
as enhanced control logic, adaptive delay set, and
Very Low 150-μA Current During Undervoltage
shutdown capability. Because it is built using the
Lockout (UVLO)
BCDMOS process, it operates with dramatically less
supply current than its bipolar counterparts. The
APPLICATIONS
UCC2895-Q1 can operate with a maximum clock
frequency of 1 MHz.
Phase-Shifted Full-Bridge Converters
Off-Line, Telecom, Datacom, and Servers
Distributed Power Architecture
High-Density Power Modules
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008–2012, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.

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