RT9594A 查看數據表（PDF） - Richtek Technology

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RT9594A

MOSFET Integrated Smart Photoflash Capacitor Charger with IGBT Driver

Richtek Technology 

VBAT < 2.5V

VBAT

(1V/Div)

IIN

(200mA/Div)

VOUT

(50V/Div)

Change to lower current

Time (1s/Div)

Figure 7. Lower Charging Current

Layout Guide

For best performance, careful PCB layout is necessary.

The following guidelines should be strictly followed when

designing a PCB layout for the RT9594A/B.

1. Both of primary and secondary power paths should be

as short as possible.

2. Place the RCS as close to chip as possible. The GND

side of RCS should be directly connected to ground

plane to avoid noise coupling.

3. Keep FB node area small and far away from nodes

with voltage switching to reduce parasitic capacitance

coupling effect.

4. The PGND should be connected to VBAT ground plane

to reduce switching noise.

VBAT

VOUT

PGND

PGND

AGND

16 15 14 13

Bottom

VBAT 1

12 VDD

CS 2

VDOUT 3

FBVD 4

PGND

17

11 FB

10 STAT

9 AGND

5678

Figure 8. Suggestion Layout

DS9594A/B-02 April 2011

RT9594A/B

www.richtek.com

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