L9914 datasheet(7/13 Pages) STMICROELECTRONICS

7 / 13 page

DS4742 Rev 7

7/13

L9914

Electrical specifications

2.4

Electrical characteristics

Tj -35 °C to +150 °C unless otherwise specified.

Figure 3. Reverse B+ test circuit

Table 6. Electrical characteristics

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VOS

Operating supply voltage

16(1)

ISB

Standby current (2)

VGO = 12.6 V, Tcase -35 to +80 °C

400

µA

VGO = 12.6 V, 80 <Tcase< +150 °C

VSF

Regulator set-point in fault

PWM signal loss

13.8

VNB

Generator output, no battery

No battery, IOUT = 2 A to 50 %

max load

VS(3)-2

VS+2

Thermal compensation

Driven by ECM

RVC or FLAT

VLR

Load regulation - L9914A

6500 grpm, 10 % to 95 % load

300

VSR

Speed regulation

15 A load, 2,000 to 10,000 grpm

100

VFON

Output saturation voltage

IF = 9 A, Tcase ≤ 25 °C

750

VFON

Output saturation voltage

IF = 6 A, Tcase > 25 °C

850

IFLIM

Field limit current

F shorted to GND, Tcase ≤ 25 °C

F shorted to GND, Tcase = 150 °C

Field discharge rectifier

IF =6 A, Tcase = 25 °C

1.85

Diode reverse current

VR = 16 V

fOSC

Oscillation frequency

During LRC operation

340

400

460

MFDC

Minimum field duty-cycle

V(VGO) < VOV (4)

-6.25-

RFM

Impedance @ FM pin

Impedance between FM and F+



1. 16 V is the maximum operating voltage.

2. Standby current measured with L, FM open; F connected to GND; P open or tied to GND.

3. VS= Vset point (with or without protocol).

4. When the voltage sensed at VGO terminal is above VOV the minimum field duty-cycle will be 0%.

FIELD

ASVR

VGO

POWER SUPPLY

2.5V

GAPGPS03057

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