L9959S datasheet(8/43 Pages) STMICROELECTRONICS

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Pins description

L9959S, L9959T

8/43

DocID023416 Rev 6

2.1

Pin definitions and functions

Table 2. L9959S pinout

Symbol

Function

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

PGND

Power Ground

CAP3V3

Pin for external capacitor:

This capacitor is used for the internal 3.3 V controller. A capacitance between 60 nF and

150 nF (typical 100 nF) is required and has to be connected close to this pin with low

inductance and resistance.

VDD

VDD Supply: 5 V Supply

GNDABE

Sense Ground for VDD monitoring

AGND

Device Ground

OUT1

Bridge output 1 and 2:

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

OUT2

DIR

Direction input:

The DIR pin controls the switch direction of OUT1 and OUT2.

PWM

PWM input:

The PWM input switches OUT1 and OUT2.

DIS

Disable input:

DIS switches OUT1 and OUT2 to tristate.

/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.

9CF

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.

5SCK

Serial clock input:

This input controls the internal shift register of the SPI.

7SI

Slave in (Serial data input):

The input receives serial data from the microcontroller.

8SO

Slave Out (Serial data output):

The diagnosis data is available via the SPI through this tristate-output.

6SS

Slave Select input:

The serial data transfer between the device and the micro controller is enabled by pulling

the input SS to low level.

AGND

Exposed Pad:

Connected to AGND.

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