FUNCTIONAL DESCRIPTION

The Triple High-Side Power-MOS Driver features

all necessary control and protection functions to

switch on three Power-MOS transistors operating

as High-Side switches in automotive electronic

control units. The key application field is relays re-

placement in systems where high current loads,

usually motors with nominal currents of about 40A

connected to ground, has to be switched.

A high signal at the EN pin enables all three

channels. With enable low gates are clamped to

ground. In this condition the gate sink current is

higher than the specified 3mA. An enable low sig-

nal makes also a reset of the timer.

A low signal at the inputs switch on the gates of

the external MOS. A short circuit at the input

leads to permanent activation of the concerned

channel. In this case the device can be disabled

with the enable pin. The charge pump loading is

not influenced due to the enable input.

An external N-channel MOS driver in high side

configuration needs a gate driving voltage higher

pump with integrated charge transfer capacitors

The charge pump is dimensioned to load a ca-

ELECTRICAL CHARACTERISTICS (7V

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

SUPPLY

Static Operating Supply Current

2.5

mA

CHARGE PUMP

817

V

Charging Time

200

µs

Overvoltage Shut down

20

30

V

Overvoltage Shut down

Hysteresis

1)

50

200

1000

mV

Charge Pump frequency

1)

100

250

400

KHz

GATE DRIVERS

Gate Source Current

-5

-3

-1

mA

Gate Sink Current

≥ 0.8V

1

3

5

mA

DRAIN - SOURCE SENSING

Bias Current Programming

voltage

10

1.8

2

2.2

V

Drain pin leakage current

0

5

µA

Drain pin bias current

Source pin input current

10

60

µA

Comparator Hysteresis

20

mV

TIMER

Timer threshold high

4

4.4

4.8

V

Timer threshold low

0.3

0.4

0.5

V

Timer Current

INPUTS

Input Enable low voltage

-0.3

1

V

Input Enable high voltage

3

7

V

Input Enable Hysteresis

(1)

50

200

500

mV

Input source current

≤ 3V

-30

-5

µA

Enable sink current

≥ 1V

5

30

µA

Transfer time IN/ENABLE

2.5

µs

NOTE: Not measured guaranteed by design

Function is given for supply voltage down to 5.5V. Function means: The channels are controlled from the

inputs, some other parameters may exceed the limit. In this case the programming voltage and timer

threshold will be lower. This leads to a lower protection threshold and time.

L9380

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