L9959 datasheet(11/49 Pages) STMICROELECTRONICS

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L9959

Pins description

CF2

Current Proportional Feedback output:

The CF pin provides in conjunction with an external resistor an output current, which is

proportional to the H-Bridge current. CF1 belongs to OUT11 and OUT12, CF2 to OUT21

and OUT22.

/ABE2

Bidirectional Ability/Enable Pin 2:

Open-Drain Output, which is pulled low in case of VDD over- and under-voltage. If the input

is pulled to low, all output stages are switched off. /ABE2 belongs to chip 2.

GNDABE2

Sense Ground for VDD monitoring

VDD1(2)

VDD Supply: 5V Supply.

31, 32

VS1(3)

Power supply voltage for power stage outputs (external reverse protection required):

Important: For the capability of driving the full current at the outputs all pins of VS must be

externally connected.

DIS1

Disable input 1:

DIS1 switches OUT11 and OUT12 to tristate

DIR1

Direction input 1:

DIR1 pin controls the switch direction of OUT11 and OUT12.

PWM1

PWM input 1:

PWM1 input switches OUT11 and OUT12.

OUT12

Bridge output 11, 12, 21, and 22:

The bridge outputs are built of a high-side p-channel and a low-side N-channel transistor.

The bridge outputs of chip 1 are OUT11 and OUT12, of chip 2 OUT21 and OUT22.

AGND(4)

Exposed PAD: connected to AGND

1. Pins 1 is referred to die 1, whereas 19 is referred to die 2.

2. Pins 12 is referred to die 2, whereas 30 is referred to die 1.

3. Pins 13 and 14 are referred to die 2, whereas pins 31 and 32 are referred to die1.

4. Pins 10 is referred to die 2, whereas 28 is referred to die 1.

Table 3. L9959T (Two H-Bridge drivers in one package) PSSO36 pin-out (continued)

Symbol

Function

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