SC4808B-2MSTRT Semtech, SC4808B-2MSTRT Datasheet

SC4808B-2MSTRT

Manufacturer Part Number

SC4808B-2MSTRT

Description

IC,SMPS CONTROLLER,CURRENT/VOLTAGE,TSSOP,10PIN,PLASTIC

Manufacturer

Semtech

Datasheets

1.SC4808B-2MSTRT.pdf (28 pages)

2.SC4808B-2MSTRT.pdf (28 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

SC4808B-2MSTRT

Manufacturer:

SEMTECH/美国升特

Quantity:

20 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

SC4808B-2MSTRT(AB2B)

Manufacturer:

SEMTECH/美国升特

Quantity:

20 000

Current page: 1 of 28
Download datasheet (441Kb)

The SC4808B-2 is a dual-ended, high frequency, integrated

PWM controller, optimized for isolated applications that

require minimum space. It can be configured for current

or voltage mode operation with required control circuitry

where secondary side error amplifier is used.

Some of the key features are high frequency operation of

1 MHz that allows the use of smaller components thus

saving cost and valuable board space. An internal ramp

on the Current Sense pin allows Internal Slope

Compensation programmed by an external resistor. Other

features include programmable frequency up to 1MHz,

Pulse by Pulse current and Line Monitoring Input with

Hysteresis to reduce stress on the power components.

A unique oscillator is used to synchronize two SC4808B-

2’s to work out of phase. This minimizes the input and

output ripple thus reducing noise on the output line and

reducing stress and size of input/output filter components.

The dual outputs can be configured in Push-Pull, Half Bridge

and Full Bridge format with programmable dead time

between two outputs depending on the size of the timing

components.

The SC4808B-2 also features a turn on threshold of 4.4V

and is available in MSOP-10 package.

Revision: May 3, 2006

Typical Application Circuit

POWER MANAGEMENT

Description

Gnd_In

Vin

RSENSE

SYNC

OUTA

OUTB

VCC

LUVLO

SC4808

Features

Applications

GND

REF

120µA starting current

Pulse by pulse current limit

Programmable operation up to 1MHz

Internal soft start

Programmable line undervoltage lockout

Over current shutdown

Dual output drive stages on push-pull configuration

Programmable internal slope compensation

Programmable mode of operation (peak current mode

or voltage mode)

External frequency synchronization

Bi-phase mode of operation

-40 to 105 °C operating temperature

MSOP-10 Lead-free package. This product is fully WEEE

and RoHS compliant

Telecom equipment and power supplies

Networking power supplies

Industrial power supplies

Push-pull converter

Half bridge converter

Full bridge converter

Isolated VRM’s

High Performance Dual

Ended PWM Controller

Gnd_Out

SC4808B-2

www.semtech.com

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