PIN FUNCTIONS

1. POWER SUPPLY

Supply voltage input. When the supply reaches the

maximum operating voltage (32V) the device is tur-

ned off, protecting itself and the load.

2. INPUT

TTL compatible input. High level on this pin means

outputcurrentON. Thelow level voltageswitches off

the charge pump, the power stage and the diagno-

stic output reducing to the minimum value the quie-

scent current.

3. GROUND

This pin must be connected to ground.

4. DIAGNOSTIC FEEDBACK

The diagnostic circuit is active in input high level

condition. This output detects with Tipically 45ms

°C the following faults :

limited at 25A.

with load current < 0.6A.

The diagnostic output is active low. The diagnostic

delay time allows to avoid spurious diagnosys (i.e :

turn ON overcurrent, overvoltage spikes etc.).

5. POWER OUTPUT

The device is provided with short circuit protection

at Vs

≤ 14.4V

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Operat. Voltage

6

32

V

On Resistance

°C

Input >2V:Full T range

0.1

0.2

Ω

Short circuit current

25

A

Over Current Detection Level

20

A

Open Load Detection Level

Device ON

1.2

A

Output Under Voltage Clamping

-12

-4

V

Off State Supply Current

°C

°C

100

300

µA

µA

ON State Supply Current

°C10

mA

Input Low Level

0.8

V

Input High Level

2.0

V

Input Current

15

µA

Diagnostic Output Leakage

Voltage

VCC = 5V

Diagnostic Output

10

µA

Diagnostic Output Saturation

Voltage

0.4

V

Diagnostic Delay Time

°C;

45

ms

Output ON Delay Time

°C15

µs

Output ON Rise Time

°C65

µs

Output OFF Delay Time

°C50

µs

Output OFF Fall Time

°C

100

µs

L9821

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