SS9176CS-3 datasheet(10/12 Pages) SSC

номер детали	SS9176CS-3

подробное описание детали	Dual Synchronous DC/DC Controllers With Current Sharing Circuitry

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производитель	SSC [Silicon Standard Corp.]

домашняя страница	http://www.siliconstandard.com

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SS9175/6

Two independent voltage outputs using SS9175

For independent outputs, this design is implemented

using SS9175. The dual-phase MOSFETs can be

supplied from different supply voltages (in this case,

from 12V for channel 2, and 5V for channel 1).

They can be supplied from the same supply

voltage, too. As there are two independent output

voltages (2.1V and 1.4V in this case), the divided

voltages are fed back to their respective IN1 and

IN2 pins. The VCC supply voltage can be either

12V or 5V, depending on the convenience of PCB

layout, but VCC = 12V is recommended. If VCC >

6.5V, the BSTC output is fixed at 6V. This BSTC

voltage is used as the supply voltage for the

bootstrap circuit’s diodes input. A 10uF capacitor is

recommended for BSTC decoupling. A 1k resistor

is connected from CL1+ and CL2+ to the

MOSFET’s high-side voltages. This 1k resistor is

used to program the OCP level.

12V

5V

PWRG

CL1+

CL1-

DH1

DL1

BST1

PGND

COMP1

VCC

PWRGD

IN1

CL2+

CL2-

DH2

DL2

BST2

BSTC

COMP2

SS/ENB

GND

IN2

10uF

1k

7.5uH

50k

450uF

25k

50k

2.1v

1uF

0.22uF

1k

2.2pF

450uF

n APPLICATION INFORMATION (cont.)

Rev.2.02 12/29/2003

PRELIMINARY

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