UCC2895-Q1 Datasheet, PDF (1/22 Pages) Texas Instruments – BiCMOS ADVANCED PHASE-SHIFT PWM CONTROLLER

UCC2895-Q1
www.ti.com
SLUS783C – MAY 2008 – REVISED AUGUST 2012
BiCMOS ADVANCED PHASE-SHIFT PWM CONTROLLER
Check for Samples: UCC2895-Q1
FEATURES
1
• Qualified for Automotive Applications
• Programmable Output Turn-On Delay
• Bidirectional Oscillator Synchronization
• Voltage-Mode, Peak-Current-Mode, or
Average-Current-Mode Control
• Programmable Soft Start/Soft Stop 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 Undervoltage
Lockout (UVLO)
APPLICATIONS
• Phase-Shifted Full-Bridge Converters
• Off-Line, Telecom, Datacom, and Servers
• Distributed Power Architecture
• High-Density Power Modules
DESCRIPTION
The UCC2895-Q1 is 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.
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.
UCC2895
Q1
1 EAN
EAP 270
2 EAOUT SS/DISB 19
3 RAMP
OUTA 18
4 REF
OUTB 17
A
5 GND
PGND 16
6 SYNC
VCC 15
V
BIAS
7 CT
OUTC 14
B
8 RT
OUTD 13
9 DELAB
CS 12
10 DELCD
ADS 11
V
OUT
C
V
IN
D
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
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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