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L9950XPTR Datasheet(PDF) 6 Page - STMicroelectronics |
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L9950XPTR Datasheet(HTML) 6 Page - STMicroelectronics |
6 / 39 page Block diagram and pin description L9950 - L9950XP 6/39 Doc ID 10311 Rev 10 1 Block diagram and pin description Figure 1. Block diagram Table 2. Pin definitions and functions Pin Symbol Function 1, 18, 19, 36 GND Ground. Reference potential. Important: for the capability of driving the full current at the outputs all pins of GND must be externally connected. 2, 35 OUT11 Highside driver output 11. The output is built by a highside 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 highside 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. Important: for the capability of driving the full current at the outputs both pins of OUT11 must be externally connected. OUT1 OUT2 OUT3 M Charge Pump CM / PWM2 CSN CLK DO DI VS VCC VCC V BAT µC GND Lock 1k MUX 5 PWM1 OUT7 OUT8 1k 1k 1k 1k 1k 100k * Note: Value of capacitor has to be choosen carefully to limit the VS voltage below absolute maximum ratings in case of an unexpected freewheeling condition of inductive loads (e.g. TSD, POR) * ** Note: Resistors between µC and L9950 are recommended to limit currents for negative voltage transients at VBAT (e.g. ISO type 1 pulse) + Note: Using a ferrite instead of 10ohm will additionally improve EMC behavior Reverse Polarity Protection ** ** ** ** ** ** 100µF Safe Lock M 100nF VREG 100 10 100nF CP EMC Optimization + Exterior Light Safety Light OUT9 OUT10 OUT11 OUT4 OUT5 OUT6 M M M Folder xy-Mirror Motors Footstep Light Turn Indicator Defroster |
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