L9733 datasheet(31/34 Pages) STMICROELECTRONICS

部件名	L9733

功能描述	Octal self configuring low/high side driver

PDF	34 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

31 / 34 page

L9733

Application circuit

Doc ID 11319 Rev 11

31/34

Application circuit

Figure 10.

Optimized circuit layout to achieve proper EMI/ESD capability

VDD 5V

SPI

GND

All output C = 47nF ceramic

47…100nF

Ceramic

VBAT

DRNX

Module

Connector

Central ground plane (blue coloured)

47…100nF Ceramic

Voltage

Reg.

Positive ISO - pulse

protection

R1= 10...22

(EMI improvement)

Reverse polarity & neg. ISO -pulse protection

Battery

IN 6

IN 7

IN 8

VDD

RES

SCLK

VDO

Capacitor impedance

Frequency

VBAT supplies the floating charge pump. Filtering

capacitor C1 is important to achieve a proper EMI

performance. Impedance minimum should fit to

the critical frequency range. A series resistor to

VBAT can improve furthermore EMI performance.

VDD on/off for low

quiescent current

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