L9912TR datasheet(37/84 Pages) STMICROELECTRONICS

Nome de Peças	L9912TR

Descrição Electrónicos	Automotive vehicle conform car alternator regulator IC

PDF	84 Pages

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Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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L9912

Electrical specifications

5.3.14

Pin "GHS" and "GLS"

Figure 16. External high current lamp pre-driver circuitry

A high current external MOS driver is available in case the lamp/relay system requires more

current than the internal MOS can deliver. The GHS and GLS pins are dedicated to drive the

external MOSs' gates providing the necessary current.

The gate-source-voltage of the external Power-MOS is limited by the driver circuit.

tLfilterLS

Low-side current

limitation filter

time

Analogue filter time

μs

VLrevHS

High-side

reverted bias

protection over-

drive

High-side turn-on

I(L)>ILpulldw to cause high-side turn-off

[i.e. V(L)-V(A+/B+)>0 V]

-550

1. In Power Stand-by mode the pull-up current is -5µA,min.

2. In case of L pin used for RVC protocol (RVC drive mode) I(L)= 20mA,max.

3. The microcontroller application software must take care to respect the value in item #17

Table 23. Electrical characteristics pin "L" (continued)

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

L9912TR Folha de dados(PDF) 37 Page - STMicroelectronics