L9918 datasheet(13/109 Pages) STMICROELECTRONICS

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Power supply and battery voltage sensing - B+ pin

Unless otherwise specified, all the electrical characteristics provided in this chapter refers to Tj between -40 °C

and 150 °C.

2.1

B+ electrical characteristic

Table 6. B+ electrical characteristic

Symbol

Parameter

Notes

Min.

Typ.

Max.

Unit

VBOpVR

Operating Voltage Range

VBdeepLV

Deep low Voltage Range

parameter degradation, not reset

(according to ISO16750 - cranking )

IBstbyL80

Stand-by current consumption

lower 80 °C

VB+ = 12.5 V; VPH = 0;

VLIN = 12.5 V; T < 80 °C

µA

IBstbyH80

Stand-by current consumption

higher 80 °C

VB+ = 12.5 V; VPH = 0;

VLIN = 12.5 V; T > 80 °C

100

µA

IBactive

Current consumption out of stand-

VB+ = 12.5 V; No current load on

EXC and LIN

VBSPLINRG

Set-Point Voltage Range for LIN

communication

VPH = 10 Vpp square wave at

500 Hz; valid LIN communication;

@ Tj = 30 °C

10.6

VBSPDEF

Default Set_Point Voltage Range

(no LIN communication)

(NVM UR_DEF_REG)

VPH = 10 Vpp square wave at

500 Hz; no LIN communication; @

Tj = 30° C

10.6

VBSP_tol30

Set_Point voltage tolerance

Tj = 30 °C

VPH = 10 Vpp square wave

at 500 Hz; with/without LIN

communication (please refer to

Figure 5)

-100

+100

VBSP_tolTrange

Set_Point Voltage

Tolerance-40 °C < Tj < 150° C

VPH = 10 Vpp square wave

at 500 Hz; with/without LIN

communication ((please refer to

Figure 5)

-150

+150

ΔVBload

Regulated Voltage variation with

the load

Difference between regulated

voltage when EXC duty cycle is

10 % and regulated voltage when

EXC duty cycle is 90 %

I_AN

P_A

ΔVBspeed(1)

Regulated Voltage variation with

the speed

Difference between regulated

voltage when Ialt = 10 A;

2000rpm < Alt speed < 18000rpm

-50

100

VBSP_LDslope

Voltage Slope to address default

Set Point starting from LIN Set

Point

0.18

0.2

0.22

V/s

1. Not subject to production test, specified by design (alternator dependent).

The maximum tolerated ripple value on B+ is ± 6 V whatever speed and load. In case voltage ripple on battery

line exceeds this limit, declared tolerance cannot be guaranteed,

L9918

Power supply and battery voltage sensing - B+ pin

DS13000 - Rev 2

page 13/109

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