L99H01 datasheet(10/53 Pages) STMICROELECTRONICS

10 / 53 page

Block diagram and pin description

L99H01

10/53

DocID15567 Rev 6

DIR

Direction select input for H-bridge control. This input has a pull-down

current.

PWM

PWM input for H-bridge control. This input has a pull-down current.

CSN

Chip select not input: this input is low active and requires CMOS logic

levels. The serial data transfer between L99H01 and microcontroller is

enabled by pulling the input CSN to low-level. This input has a pull-up

current.

CLK

Serial clock input: this input controls the internal shift register of the

SPI and requires CMOS logic levels.This input has a pull-down

current.

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

data from the microcontroller. The data is an 8-bit control word and the

most significant bit (MSB, bit 7) is transferred first. This input has a

pull-down current.

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

tristate-output. The output remains in tristate, if the chip is not selected

by the input CSN (CSN = high).

CSO

Current sense amplifier output: VCC compatible.

CSI1+

Current sense amplifier input: positive input 1, multiplexible.

CSI1-

Current sense amplifier input: negative input 1, multiplexible.

CSI2+

Current sense amplifier input: positive input 2, multiplexible.

CSI2-

Current sense amplifier input: negative input 2, multiplexible.

Not connected.

TS/ ACT_OFF Thermal sensor interface or external off for all gate drivers.

GL2

Gate driver for PowerMOS low-side switch in halfbridge 2.

SL2

Source of low-side switch in halfbridge 2.

GH2

Gate driver for PowerMOS high-side switch in halfbridge 2.

SH2

Source/drain of halfbridge 2.

SL1

Source of low-side switch in halfbridge 1.

GL1

Gate driver for PowerMOS low-side switch in halfbridge 1.

SH1

Source/drain of halfbridge 1.

GH1

Gate driver for PowerMOS high-side switch in halfbridge 1.

Charge pump output.

CP2+

Charge pump pin for capacitor 2, positive side.

Table 3. Pin definitions and functions (continued)

Symbol

Function

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