Datasheet > UC3895

UC3895

更新时间： 2024-11-27 00:04:27

品牌	Logo	应用领域
其他 - ETC		控制器
页数	文件大小	规格书
11页	177K
描述
BiCMOS Adbanced Phase Shift PWM Controller

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中文翻译

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数据手册

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UC3895 数据手册

application

INFO

UCC1895

UCC2895

UCC3895

available

BiCMOS Advanced Phase Shift PWM Controller

FEATURES

DESCRIPTION

• Programmable Output Turn-on Delay

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. It allows constant frequency pulse-width modula-

tion in conjunction with resonant zero-voltage switching to provide high effi-

ciency at high frequencies. The part can be used either as a voltage mode

or current mode controller.

• Adaptive Delay Set

• Bidirectional Oscillator Synchronization

• Capability for Voltage Mode or Current

Mode Control

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 capabil-

ity. Since it is built in BCDMOS, it operates with dramatically less supply

current than it’s bipolar counterparts. The UCC3895 can operate with a

maximum clock frequency of 1MHz.

• Programmable Soft Start/Soft Stop

and Chip Disable via a Single Pin

• 0% to 100% Duty Cycle Control

• 7MHz Error Amplifier

• Operation to 1MHz

The UCC3895 and UCC2895 are offered in the 20 pin SOIC (DW) pack-

age, 20 pin PDIP (N) package, 20 pin TSSOP (PW) package, and 20 pin

PLCC (Q). The UCC1895 is offered in the 20 pin CDIP (J) package, and 20

pin CLCC package (L).

• Low Active Current Consumption

(5mA Typical @ 500kHz)

• Very Low Current Consumption

During Undervoltage Lock-out

(150µA typical)

SIMPLIFIED APPLICATION DIAGRAM

UCC3895

EAN

EAP 270

V_OUT

EAOUT

RAMP

REF

SS/DISB 19

OUTA 18

OUTB 17

PGND 16

VCC 15

GND

SYNC

V_IN

V_BIAS

OUTC 14

OUTD 13

CS 12

DELAB

10 DELCD

ADS 11

UDG-98139

SLUS157A - DECEMBER 1999

12 3 4 5 6 7...11

中文翻译

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