UCC2895-Q1
www.ti.com
SLUS783C –MAY 2008–REVISED AUGUST 2012
BiCMOS ADVANCED PHASE-SHIFT PWM CONTROLLER
Check for Samples: UCC2895-Q1
1
FEATURES
DESCRIPTION
The UCC2895-Q1 is
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Qualified for Automotive Applications
Programmable Output Turn-On Delay
Bidirectional Oscillator Synchronization
a phase-shift pulse-width
modulation (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.
It allows constant-frequency PWM in conjunction with
resonant zero-voltage switching to provide high
efficiency at high frequencies. The device can be
used either as a voltage-mode or current-mode
controller.
Voltage-Mode, Peak-Current-Mode, or
Average-Current-Mode Control
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Programmable Soft Start/Soft Stop and Chip
Disable Via a Single Pin
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0% to 100% Duty-Cycle Control
7-MHz Error Amplifier
Although the UCC2895-Q1 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 it is built using the
BCDMOS process, it operates with dramatically less
supply current than its bipolar counterparts. The
UCC2895-Q1 can operate with a maximum clock
frequency of 1 MHz.
Operation to 1 MHz
Typical 5-mA Operating Current at 500 kHz
Very Low 150-μA Current During Undervoltage
Lockout (UVLO)
APPLICATIONS
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Phase-Shifted Full-Bridge Converters
Off-Line, Telecom, Datacom, and Servers
Distributed Power Architecture
High-Density Power Modules
UCC2895
Q1
EAN
EAP
7
20
1
2
VOUT
EAOUT SS/DISB
19
18
17
16
15
14
13
12
11
RAMP
REF
OUTA
OUTB
PGND
VCC
3
4
A
C
GND
SYNC
CT
5
VIN
VBIAS
6
OUTC
OUTD
CS
7
B
D
RT
8
DELAB
DELCD
9
ADS
10
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
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necessarily include testing of all parameters.
Copyright © 2008–2012, Texas Instruments Incorporated