3/8

L9468

Notes:

1. 20 Volts is the maximum operating voltage because above this level the FAILSAFE feature shuts down the output stage.

2. Thermal slopes are shown in fig. 2

3. This value is present when the voltage sensed at the " S" or "VGO" terminal is between VUV and VOV. When the voltage sensed

at the "S" or "VGO" terminal is above VOV the Minimum Field Duty-Cycle will be 0 %.

Figure 4. Reverse B+ Test Circuit

Table 5. Electrical Characteristcs

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

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

VOS

Operating Supply Voltage

Tcase = +25 to +150 °C

8

20 1

V

VOS

Operating Supply Voltage

Tcase = - 40 to +25 °C

10

20

V

ISB

Stand-by Current

VGO = 12.6V, Tcase -35 to +80 °C

400

A

ISB

Stand-by Current

VGO = 12.6 V, 80°C <Tcase< +150°C

1

mA

VS

Regulator Set-Point

@ 71°C ± 3°C

14.1

V

VNB

Generator output, no battery

No battery, IOUT =2A to 50% Max

Load

VS-2

VS+2

V

TC

Thermal compensation

Voltage @ VS or VGO

2 in failsoft

V

VLR

Load Regulation

6500 grpm, 10% to 95% load

300

mV

VSR

Speed Regulation

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

100

mV

VFON

Output Saturation Voltage

IF = 6A, VGO = 14.7V, Tcase = 25°C

750

mV

VFON

Output Saturation Voltage

IF = 5A, VGO = 13.5V, Tcase = 125°C

850

mV

IFLIM

Field limit current

F terminal shorted to GND @ 25°C

8.3

A

F terminal shorted to GND @ 150°C

5

A

VF

Field Discharge Rectifier

IF = 6A, Tcase = 25°C

1.85

V

IR

Diode Reverse Current

VR = 20V

1

mA

fOSC

Oscillation frequency

During LRC operation

340

400

460

Hz

MFDC

Minimum Field Duty-Cycle

VUV < V(S or VGO) < VOV

3

6.25

%

RFM

Impedance @ FM pin

Impedance between FM and F+

5

15

K



1.8

Ω

FIELD

ASVR

FM

S

F

L

I

P

VGO

F

G

INCANDESCENT

LOAD 14

Ω

D02AT505

POWER SUPPLY

6V

+-

POWER SUPPLY

2.5V

-+