RT9227A Ver la hoja de datos (PDF) - Richtek Technology

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Lista de partido

RT9227A

Advanced PWM and Dual Fixed Linear Power Controller

Richtek Technology 

RT9227A

Preliminary

Typical Application Circuit

12V

15A

1uH

5V

GND

4*1000uF

10

2*1uF

3.3V

VOUT3

1.5V

VOUT2

2.5V

RFD3055

1000uF

270uF

1uF

1

VCC

12 VIN2

OSET1 20

1000uF

PGOOD 7

15 GATE3

16 FB3

24

UGATE1

PHASE2 23

RT9227A

13 VOUT2 LGATE1 22

11 FB2

PGND 21

1000pF

1.21K

PHB83N03LT

PHB95N03LT

6 VID0

5 VID1

4 VID2

3 VID3

2 VID4

19

VSEN1

FB1 18

FAULT 8

SS 9

GND

14

0.039uF

POWERGOOD

10K

3.5uH

4.99K

7*1000uF

VOUT1

1.3V to 3.5V

0.68uF

732K

Function Block Diagram

VSEN1

OCSET1

VCC

FB3

GATE3

VIN2

VOUT2

FB2

FAULT

3.3V

-

0.3V

+

+

-

+

+

- 1.26V

-

110%

90%

115%

+ OC2

0.25A -

Soft Start

& Fault Logic

VCC

11uA

5V

DACOUT

TTL D/A

Converter

(DAC)

+

-

+

-

+ Over Voltage

-

Power-On 3.3V

Reset (POR)

VCC

OC1

+

-

Inhibit

PWM

Comparator

+

+

PWM

-

Error

-

Amplifier

Gate

Control

Logic

VCC

Oscillator

Compensation

Lower

Drive

PGOOD

UGATE1

PHASE1

LGATE1

PGND

GND

SS

FB1

www.richtek.com

2

DS9227A-05 March 2007

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