L9959 datasheet(12/49 Pages) STMICROELECTRONICS

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Pins description

L9959

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DocID027540 Rev 2

Table 4. L9959U (Single version in PSSO36) pin out

Symbol

Function

PGND

Ground:

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

externally connected.

OUT1

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

SCK

Serial clock input:

This input controls the internal shift register of the SPI.

7CF

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

/ABE

Bidirectional Ability/Enable Pin:

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.

GNDABE

Sense Ground for VDD monitoring

10,11,

12,13,

14,15,

16,17,

18,19,

20,21,

22,23,

24,25,

26,27,

To be connected to GND on PCB.

AGND

Device Ground. (Connected to Exposed PAD)

VDD

VDD Supply: 5 V Supply.

31, 32

VS1

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.

DIS

Disable input :

DIS switches OUT1 and OUT2 to tristate

DIR

Direction input:

DIR pin controls the switch direction of OUT1 and OUT2.

PWM

PWM input:

PWM input switches OUT1 and OUT2.

OUT2

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

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