L9484 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

L9484

CAR ALTERNATOR VOLTAGE REGULATOR

STMicroelectronics 

1 2 3 4 5 6 7 8

L9484

Table 5.

Symbol

Electrical characteristcs (continued)

(Tcase = -35°C to +150°C continuous unless otherwise specified)

Parameter

Test condition

Min. Typ. Max. Unit

VLR Load regulation

VSR Speed regulation

6500 grpm, 10% to 95% load

15A load, 2000 to 20,000

grpm

300 mV

100 mV

VF-ON Output saturation voltage

IF = 6A, VGO = 14.0V, Tcase =

25C

750 mV

VF-ON Output saturation voltage

IF = 5A, VGO = 13.5V, Tcase =

125C

850 mV

IF-LIM Field limit current(1)

Current F+ Terminal to Gnd.

9.0

@ Tcase  25C

A

IF-LIM Field limit current(1)

Current F+ Terminal to Gnd.

6.0

@ Tcase = +150C

A

IG-MIN

Min. generator current load

Current measured @

generator output

0.5

A

VD-F Field discharge diode

IF = 6A, Tcase = 25C

1.85 V

ID-R Diode reverse current

VR = 20V

1 mA

FOSC oscillation frequency

During LRC operation

340 400 460 Hz

VDF DF saturation voltage

IDF  10mA

0.8 V

IDF-LK DF output leakage current VDF < 25V

10 A

FTURBO Internal clock frequency

VDF = 32 - 35V; thru 2.2k

4X

Hz

FTURBO IRD, SS, LRC rate

VDF = 32 - 35V; thru 2.2k

 16

1. The Field Drive capability shall not decrease as a function of temperature between 25°C and 150°C, at a

rate faster than -0.024A/°C (for example, Field Drive shall be capable of 7.2A at 100°C).

Figure 2. Typical application schematic

NTC

7

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1

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