NCP1562A datasheet(1/26 Pages) ONSEMI

部件名	NCP1562A

功能描述	High Performance Active Clamp/Reset PWM Controller

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制造商	ONSEMI [ON Semiconductor]

网页	http://www.onsemi.com

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 Semiconductor Components Industries, LLC, 2010

November, 2010 -- Rev. 5

1

Publication Order Number:

NCP1562A/D

NCP1562A, NCP1562B

High Performance Active

Clamp/Reset PWM Controller

The NCP1562x is a family of voltage mode controllers designed

for dc--dc converters requiring high--efficiency and low parts count.

These controllers incorporate two in phase outputs with an overlap

delay to prevent simultaneous conduction and facilitates soft

switching. The main output is designed for driving a forward

converter primary MOSFET. The secondary output is designed for

driving an active clamp circuit MOSFET, a synchronous rectifier on

the secondary side, or an asymmetric half bridge circuit.

The NCP1562 family reduces component count and system size by

incorporating high accuracy on critical specifications such as

maximum duty cycle limit, undervoltage detector and overcurrent

threshold. Two distinctive features of the NCP1562 are soft--stop and

a cycle skip current limit with a time threshold. Soft--stop circuitry

powers down the converter in a controlled manner if a severe fault is

detected. The cycle skip detector enables a soft--stop sequence if a

continuous overcurrent condition is present.

Additional features found in the NCP1562 include line feed--

forward, frequency synchronization up to 1.0 MHz, cycle--by--cycle

current limit with leading edge blanking (LEB), independent under

and overvoltage detectors, adjustable output overlap delay,

programmable maximum duty cycle, internal startup circuit and

soft--start.

Features

 Dual Control Outputs with Adjustable Overlap Delay

 >2.0 A Output Drive Capability

 Soft--Stop Powers Down Converter in a Controlled Manner

 Cycle--by--Cycle Current Limit

 Cycle Skip Initiated if Continuous Current Limit Condition Exists

 Voltage Mode Operation with Input Voltage Feedforward

 FixedFrequencyOperationupto1.0 MHz

 Bidirectional Frequency Synchronization

 Independent Line Undervoltage and Overvoltage Detectors

 Accurate Programmable Maximum Duty Cycle Limit

 Programmable Maximum Volt--Second Product

 Programmable Soft--Start

 Internal 100 V Startup Circuit

 Precision 5.0 V Reference

 These are Pb--Free Devices

Typical Applications

 Telecommunications Power Converters

 Low Output Voltage Converters using Control Driven Synchronous

Rectifier

 Industrial Power Converters

 42 V Automotive System

 ATX Power Supplies

TSSOP--16

DT SUFFIX

CASE 948F

x

= Current Limit (A, B)

A

= Assembly Location

WL, L

= Wafer Lot

Y

= Year

WW, W = Work Week

Gor G

= Pb--Free Package

MARKING

DIAGRAMS

NCP

562x

ALYWG

G

http://onsemi.com

SO--16

D SUFFIX

CASE 751B

See detailed ordering and shipping information in the package

dimensions section on page 24 of this data sheet.

ORDERING INFORMATION

NCP1562xG

AWLYWW

1

16

(Note: Microdot may be in either location)

类似零件编号 - NCP1562A

制造商	部件名	数据表	功能描述
ON Semiconductor	NCP1562A	483Kb / 26P	High Performance Active Clamp/Reset PWM Controller November, 2010 -- Rev. 5

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类似说明 - NCP1562A

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