RT9224(2001) Ver la hoja de datos (PDF) - Richtek Technology

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RT9224
(Rev.:2001)

5-Bit Programmable Synchronous PWM Buck Converter Controller and Output Voltage Monitor

Richtek Technology 

RT9224

Typical Application Circuit

VIN = 5V

L1

F1

1µH +CIN

5×1000µF

2N6394

2×1µF

+12V

10Ω

0.1µF

0.1µF

SS 3

VSEN 1

2K

15V

VCC OVP

18

19

MONITOR AND

PROTECTION

1000pF

OCSET

2

12 PGOOD 1K

15 BOOT

OSC

14 UGATE

Q1

VID0

VID1

VID2

VID3

VID4

4

5

6

7

D/A

8

10

13 PHASE

17 LGATE

16 PGND

11

GND

L2 - 3µH

+VO

D2

COUT

9×1000µF

+

Q2

4.99K

0.68µF

FB

750K

Component Selection Notes:

COUT, CIN– Each 1000µF 6.3W VDC, Sanyo MV-GX or Equivalent.

L2 – Core: Micrometals T50-52B; Winding: 10 Turns of 16AWG.

L1 – Core: Micrometals T50-52; Winding: 5 Turns of 18AWG.

D2 – 3A, 40V Schottky, Motorola MBR340 or Equivalent.

Q1, Q2 – PHB83N03LT; PHB95N03LT

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6

DS9224-04 July 2001

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