L99MOD50XP datasheet(9/42 Pages) STMICROELECTRONICS

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DS12615 Rev 4

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L99MOD50XP

Block diagram and pin description

Charge pump output.

This output is provided to drive the gate of an external n-channel power MOS used for

reverse polarity protection (see Figure 1.).

PWM1

PWM1 input.

This input signal can be used to control the drivers OUT1-4, OUT6-7, OUT9 and

OUT11 by an external PWM signal.

OUT7,

OUT8,

High-side driver outputs 7,8: see OUT9.

By selection of one of the 2 power DMOS at same output is it possible to supply a bulb

with low on-resistance or a LED with higher on-resistance in a different application.

OUT9

High-side driver output 9.

The output is built by a high-side switch and is intended for resistive loads, hence the

internal reverse diode from GND to the output is missing. For ESD reason a diode to

GND is present but the energy which can be dissipated is limited. The high-side driver

is a power DMOS transistor with an internal parasitic reverse diode from the output to

VS (bulk-drain-diode). The output is over-current and open load protected.

OUT10

High-side driver output 10: see OUT9.

Important: beside the bit10 in control register 1 this output can be switched on setting

bit1 for electrocromic control mode with higher priority.

Table 2. Pin definition and functions (continued)

Symbol

Function

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