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UCC2895-EP Datasheet Preview

UCC2895-EP Datasheet

Phase-Shift PWM Controller

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UCC2895-EP

SCBS809G – DECEMBER 2005 – REVISED SEPTEMBER 2017

UCC2895-EP BiCMOS Advanced Phase-Shift PWM Controller

1 Features

•1 Programmable Output Turnon Delay

• Adaptive Delay Set

• Bidirectional Oscillator Synchronization

• Capability for Voltage-Mode or 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

• Low-Active Current Consumption (5-mA Typ at

500 kHz)

• Very-Low-Current Consumption During

Undervoltage Lockout (150-μA Typ)

• Supports Defense, Aerospace, and Medical

Applications:

– Controlled Baseline

– One Assembly/Test Site

– One Fabrication Site

– Available in Military (–55°C to 125°C)

Temperature Range

– Extended Product Life Cycle

– Extended Product-Change Notification

– Product Traceability

2 Description

The UCC2895-EP 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.

While the UCC2895-EP maintains the functionality of

the UC2875/6/7/8 family, it improves on that controller

family with additional features, such as enhanced

control logic, adaptive delay set, and shutdown

capability. Since the device is built in BCDMOS, it

operates with dramatically less supply current than its

bipolar counterparts. The UCC2895-EP can operate

with a maximum clock frequency of 1 MHz.

The M-temp UCC2895-EP device is offered in the 20-

pin SOIC (DW) package.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

UCC2895-EP

SOIC (20)

7.50 mm × 12.80 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Application Diagram

UCC3895

1 EAN

EAP 270

2 EAOUT SS/DISB 19

3 RAMP

OUTA 18

4 REF

OUTB 17

5 GND

PGND 16

6 SYNC

VCC 15

7 CT

OUTC 14

8 RT

OUTD 13

9 DELAB

CS 12

10 DELCD

ADS 11

VBIAS

VOUT

VIN

UDG−98139

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

etcTI

UCC2895-EP Datasheet Preview

UCC2895-EP Datasheet

Phase-Shift PWM Controller

No Preview Available !

UCC2895-EP

SCBS809G – DECEMBER 2005 – REVISED SEPTEMBER 2017

www.ti.com

Table of Contents

1 Features .................................................................. 1

2 Description ............................................................. 1

3 Revision History..................................................... 2

4 Pin Configuration and Functions ......................... 3

5 Specifications......................................................... 6

5.1 Absolute Maximum Ratings ...................................... 6

5.2 ESD Ratings.............................................................. 6

5.3 Recommended Operating Conditions....................... 6

5.4 Thermal Information .................................................. 7

5.5 Electrical Characteristics........................................... 7

5.6 Typical Characteristics ............................................ 10

6 Application and Implementation ........................ 11

6.1 Programming DELAB, DELCD, and Adaptive Delay

Set (ADS) ................................................................. 11

6.2 Circuit Description ................................................... 14

7 Device and Documentation Support.................. 16

7.1 Receiving Notification of Documentation Updates.. 16

7.2 Community Resources............................................ 16

7.3 Trademarks ............................................................. 16

7.4 Electrostatic Discharge Caution .............................. 16

7.5 Glossary .................................................................. 16

8 Mechanical, Packaging, and Orderable

Information ........................................................... 17

3 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Revision F (October 2009) to Revision G

Page

• Added Device Information table, ESD Ratings table, Thermal Information table, Application and Implementation

section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section ...... 1

• Changed RAMP sink current MIN from 12 mA : to 10 mA..................................................................................................... 8

• Changed VOL MAX from 270 mV : to 330 mV ........................................................................................................................ 9

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UCC2895-EP Datasheet

Phase-Shift PWM Controller

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Phase-Shift PWM Controller

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