L9918 datasheet(55/109 Pages) STMICROELECTRONICS

номер детали	L9918

подробное описание детали	Alternator voltage regulator with LIN interface for 12 V applications

PDF	109 Pages

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производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	http://www.st.com

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55 / 109 page

NVM register name

Definition

Notes

Description

#Bits Code

PRCH_LRC_EN

0x0

disable

Enable a fixed EXC duty cycle increasing slope

when B+ voltage returns over the Low Voltage

function threshold (VLOW).

0x1

enable

PWM_FREQ

0x0

400 Hz

PWM frequency control

0x1

300 Hz

0x2

240 Hz

0x3

200 Hz

SST_ULIM_TV0_EN

0x0

disable

Enable/disable pre-excitation duty cycle switching to

0% instead of 8% @B+>VB+_LIM

0x1

enable

SV_FORD_EN

0x0

disable

Enable/disable pre-excitation special mode

0x1

enable

PWM_MINEIN

0x0

Minimum DC of the EXC signal. If 000 → min DC is

(1/128)*100 [%]. If 111 → min DC is (8/128)*100 [%].

Not applied when regulation loop set DC = 100% or

DC = 0%.

0x1

0x2

0x3

0x4

0x5

0x6

0x7

PWM_MINAUS

0x0

126

Maximum DC of the EXC signal. If 000 → max

DC is (126/128)*100 [%]. If 111 → max DC is

(119/128)*100 [%]. Not applied when regulation loop

set DC = 100% or DC = 0%.

0x1

125

0x2

124

0x3

123

0x4

122

0x5

121

0x6

120

0x7

119

IFELD_MAXB

0x0

13 A

Excitation current limitation (major priority respect to

LIN current limitation threshold)

0x1

I_MAX

0x2

11 A

0x3

12 A

I_MAX

0x0

6.0 A

Current limitation threshold

0x1

7.0 A

0x2

8.0 A

0x3

10.0 A

0x4

11.0 A

0x5

12.0 A

0x6

13.0 A

0x7

no limit

IFELD_OFFSET

0x0

Disabled

Current limitation threshold correction offset

L9918

NVM parameters table

DS13000 - Rev 2

page 55/109

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