CS51221EDR16 datasheet(6/14 Pages) ONSEMI

Nome de Peças	CS51221EDR16

Descrição Electrónicos	Enhanced Voltage Mode PWM Controller

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Fabricante Electrônico	ONSEMI [ON Semiconductor]

Página de início	http://www.onsemi.com

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CS51221

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PACKAGE PIN DESCRIPTION

Package

Pin #

Symbol

Function

1

GATE

External power switch driver with 1.0 A peak capability. Rail to rail output occurs when the capacitive load is

between 470 pF and 10 nF.

2

ISENSE

Current sense comparator input.

3

SYNC

Bidirectional synchronization. Locks to highest frequency.

4

FF

PWM ramp.

5

UV

Undervoltage protection monitor.

6

OV

Overvoltage protection monitor.

7

RTCT

Timing resistor RT and capacitor CT determine oscillator frequency and maximum duty cycle, DMAX.

8

ISET

Voltage at this pin sets pulse−by−pulse overcurrent threshold.

9

VFB

Feedback voltage input. Connected to the error amplifier inverting input.

10

COMP

Error amplifier output.

11

SS

Charging external capacitor restricts error amplifier output voltage during the power up or fault conditions.

12

LGND

Logic ground.

13

VREF

3.3 V reference voltage output. Decoupling capacitor can be selected from 0.01

mF to 10 mF.

14

VCC

Logic supply voltage.

15

PGND

Output power stage ground.

16

VC

Output power stage supply voltage.

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