AN4370 datasheet(21/23 Pages) STMICROELECTRONICS

21 / 23 page

DocID025336 Rev 1

21/23

AN4370

External components

Figure 11. Reverse battery current flow through the device

GAPG0810131116CFT

L99ASC03

SDI

SDO

CSN

SCK

IH1

IL1

Gate

Driver

Gate

Driver

x 3

Control

Diagnosis

Control

Diagnosis

GH1

SH1

GL1

CSI+

CSI-

CSO

Programmable Gain & Shutdown

AGND

CP1+

CP1-

CP2+

CP2-

Central 2 Step Charge Pump

EMC optimized „Spread Spectrum“

VCP

Programmable

VDSTH & tDead

GH2

SH2

GL2

SL1

DIS

Undervoltage

Overvoltage Det.

VSMS

VBAT

VSMS

SL2

SL3

GL3

SH3

GH3

BLDC Motor

IH2

IL2

IH3

IL3

Temperature

Prewarning

& Temperature

Shutdown

T Juntion

VS Monitoring

NRES

VSREG

CSA

x 3

RSense

INH

Ignition /

Klemme 15

STM8A

VDD

100k

VSREG

20k

SGND2

DAC

BEMF

Detection

AOUT

AMUX

5V Voltage

Regulator

(and Reset)

BEMFOUT

DOUT

Control Logic

Wake up

From

Sleep mode

MOSFET

Control

SPI

Interface

Window Watchdog

FS_FLAG

DMUX

SGND1

SGND3

CCP1

220nF

CCP2

220nF

CTANK

1μF

CVS

100nF

CVSREG

100nF

RINH

10kΩ

Note: This is a very simplified example of

an application circuit. The function must be

verified in the real application. The

external componant values should be used

as guidline only.

RCP

100kΩ

* Size according application

requirements (Voltage dropout

test, warm cranking, …)

C *

NINT

CINH

100nF

VBAT

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