Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Operating Supply Voltage

6

16

V

Quiescent Current

2.5

6

mA

Internal Supply Voltage Clamp

28

32

36

V

Supply Voltage High Threshold

16

18.5

21

V

Supply Voltage Low Threshold

4

5

6

V

Reference Voltage

3.3

3.5

3.7

V

Reference Current

1

mA

Input Low Threshold

0.13

0.15

0.2

Oscillator Freq. Constant

Note 1

800

2500

nF/s

Gate Voltage Slew Rate

Constant

Note 2

3

5

9

nFV/ms

Protection Time Delay Constant

Note 3

0.12

0.44

ms/nF

Sense Input Volt.

80

100

120

mV

8

16

V

Gate Voltage in OFF Condition

µA

1.2

V

Input Current

– 5

– 1

µA

Low Enable Voltage

0.8

V

High Enable Voltage

2.0

V

IEN

Enable Input Current

2

µA

SR

Slew Rate

0.5

V/

µs

Saturation Voltage (pin 12)

1.5

V

Notes :

FUNCTIONAL DESCRIPTION

PULSE WIDTH COMPARATOR

A ground compatible comparator generates the

PWM signal which controls the gate of the external

powerMOS.

The slopes of the leading and trailing edges of the

gate driving signal are defined by the external ca-

This feature allows to optimize the switching speed

for the power and RFI performance best suited for

the application.

The lower limit of the duty cycle is fixed at 15 % of

the ratio between the input and the reference vol-

tage (see fig. 1). Input voltages lower than this value

disable the internal oscillator signal and therefore

the gate driver.

GROUND COMPATIBLE TRIANGLE

OSCILLATOR

The triangle oscillator provides the switching fre-

to :

If the pin PWL (power limitation) is connected to

ground and Vs is higher than the PWL threshold

duced : this allows to transfer a costant power to the

load (see fig. 2).

TIMER AND PROTECTION LATCH

When an overcurrent occurs, the device starts

time is set according to :

L9610C - L9611C

4/12