RT9232 Ver la hoja de datos (PDF) - Richtek Technology

Número de pieza

componentes Descripción

Lista de partido

RT9232

Programmable Frequency Synchronous Buck PWM Controller

Richtek Technology 

RT9232

Typical Application Circuit

VIN

3.3V - 12V

VCC

L1

1uH CE0

+ 470uF

R4

C1

R1

2.2

0.22uF

14 VCC

D1

1N4148

BOOT 10

3.01k

C5

C6

CE1

CE2

13 PVCC SENSE 2

C3 1nF

R5

0.1uF 10uF

1000uF 1000uF

C2 0.22uF

UGATE 9

0

Q1

IPD09N03LA

CSS

0.1uF 3

SS

C4

0.1uF

L2

2.2uH

1

RT

PHASE 8

VOUT

VCC

R2

51k

6 EN

LGATE 12

R6

0

R7

Q2

2.2

CE3 CE4 C8 C9 C10

R3

10k

7 GND

11

PGND

IPD06N03LA

C7

1nF

4 COMP

FB 5

2200uF 510uF 22uF 10uF 0.1uF

RT9232

C11 33pF

R9

1k

C12

10nF

R8

15k

R10

C13

10nF

R11

1k

562

Functional Pin Description

No Pin Name

1 RT

Pin Function

Oscillator Frequency Setting

2 SENSE

3 SS

4 COMP

5 FB

6 EN

7 GND

Sense VIN Power Condition

Soft Start Time Interval Setting

Feedback Compensation

Voltage Feedback

Chip Enable (Active High)

IC Signal Reference Ground

8 PHASE

9 UGATE

10 BOOT

11 PGND

12 LGATE

13 PVCC

14 VCC

Return Path for Upper MOSFET

Upper MOSFET Gate Drive

Input Supply for Upper Gate Drive

Power Ground

Lower MOSFET Gate Drive

Input Supply for Lower Gate Drive

Internal IC Supply (12V Bias)

www.richtek.com

2

DS9232-06 March 2007

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