L99DZ80EP datasheet(9/68 Pages) STMICROELECTRONICS

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L99DZ80EP

Block diagram and pin description

VCC

Supply Voltage: 5 V supply. A ceramic capacitor as close as possible to

GND is recommended.

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.

PWMH

PWMH input: this input signal can be used to control the H-Bridge Gate

drivers

ECDR

ECDR: using the device in EC control mode this pin is used to control the

Gate of an external MOSFET.

62, 63

OUT7

High side driver output 8: see OUT9

Important: This output can be configured to supply a bulb with low on-

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

OUT8

OUT10/EC

High-side-driver-output 10: see OUT9

Important: Beside the OUT10-HS on/off bit this output can be switched on

setting the ECON bit for electrochrome control mode with higher priority.

ECFD

ECFD: using the device in EC control mode this pin is used as “virtual

GND” for the EC-glass. For EC-glasses, that require a negative discharge

voltage, this supplies the fast discharge voltage. If no EC-glass is used,

this pin must be connected to ground.

ECV

ECV: using the device in EC control mode this pin is used as voltage

monitor input. For fast discharge an additional low-side-switch is

implemented.

GH2

GH2: gate driver for power MOS high side switch in half-bridge 2

SH2

SH2: source of high-side switch in half-bridge 2

GL2

GL2: gate driver for power MOS low side switch in half-bridge 2

SL2

SL2: source of low side switch in half-bridge 2

GH1

GH1: gate driver for power MOS high side switch in half-bridge 1

SH1

SH1: source of high-side switch in half-bridge 1

GL1

GL1: gate driver for power MOS low side switch in half-bridge 1

SL1

SL1: source of low side switch in half-bridge 1

CP1P

CP1P: charge pump pin for capacitor 1, positive side

CP1M

CP1M: charge pump pin for capacitor 1, negative side

CP2P

CP2P: charge pump pin for capacitor 2, positive side

CP2M

CP2M: charge pump pin for capacitor 2, negative side

CP: charge pump output

Table 2. Pin definitions and functions (continued)

Symbol

Function

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