L9911A 데이터 시트보기 (PDF) - STMicroelectronics

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L9911A

CAR ALTERNATOR MULTIFUNCTION SMART VOLTAGE REGULATOR

STMicroelectronics 

L9911

Figure 7. Phase Regulation Characteristics

on

Engine off

on

Ign. Switch off

on

W/Lamp off

t_ST

t_SL

Ifield

F+/DFM

Field Pre-

excitation

Field

Regulation

Load ON

PRINCIPLE OF PHASE REGULATION:

When VB+ is above the regulated voltage, the field driver is controlled to keep phase peak voltage from

falling below VPHH1.

If phase peak voltage drops below VPHL1, phase regulation does not work.

Figure 8. Application Diagram

ignition

switch

warning lamp

_

+

Stator

B+ L

C

Field

L9911

F+

P

DFM

GND

+Vb / Vcc

to E.C.U.

8/15

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