L99MD01 datasheet(11/54 Pages) STMICROELECTRONICS

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L99MD01

Pin definitions and functions

Doc ID 17242 Rev 6

11/54

Pin definitions and functions

Table 3.

Pin description

Symbol

Function

1, 18, 19, 36

PGND

Power ground: reference potential

9AGND

Analog ground: reference potential

DGND

Digital ground: reference potential

6, 10, 13

N.C.

Not connected

Exposed pad: reference potential connected to PGND

2, 3, 16, 17,

20, 21, 34, 35

OUT 1 - 8

Half bridge-output:

the output is built by a high-side and a low-side switch, which are

internally connected. The output stage of both switches is a power

DMOS transistor. Each driver has an internal parasitic reverse diode

(bulk-drain-diode: high-side driver from output to VSx, low-side driver

from PGND to output).

VCC

Logic voltage supply 3.3 V / 5 V

For this input a ceramic capacitor as close as possible to AGND is

recommended

4, 5, 32, 33

VSA

Power supply voltage for OUT 1 to 4 (external reverse protection

required):

For this input a ceramic capacitor as close as possible to PGND is

recommended.

Important: for the capability of driving the full current at the outputs all

pins of VSA must be externally connected!

14, 15, 22, 23

VSB

Power supply voltage for OUT 5 to 8 (external reverse protection

required):

For this input a ceramic capacitor as close as possible to PGND is

recommended.

Important: for the capability of driving the full current at the outputs all

pins of VSA must be externally connected!

VS2MON

VS2 monitoring

VS supply and monitoring

SMPS

SMPS gate driver.

For overcurrent and overvoltage protection a external resistor is

recommended

7, 8

CURR1 / 2 Current monitor 1 / 2

Enable the L99MD01

SPI data in: the input requires CMOS logic levels and receives serial

data from the microcontroller. The data is a 24 bit control word and the

most significant bit (MSB) is transferred first.

SPI data out: the diagnosis data is available via the SPI and this

3-state output. The output remains in 3-state, if the chip is not

selected by the input CSN (CSN = high)

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