L9825 STMicroelectronics

L9825 Octal Low-side Driver For Resistive and Inductive Loads With Serial / Parallel Input Control, Output Protection and Diagnostic OUTPUTS CURRENT CAPABILITY UP TO 1A, R 0,75 AT T = 25C ON J PARALLEL CONTROL INPUTS FOR OUTPUTS 1 AND 2 SPI CONTROL FOR OUTPUTS 1 TO 8 RESET FUNCTION WITH RESET SIGNAL AT NRES PIN OR UNDERVOLTAGE AT V CC PowerSO20 INTRINSIC OUTPUT VOLTAGE CLAMPING ORDERING NUMBER: L9825 AT TYP. 50V OVERCURRENT SHUTDOWN AT OUTPUTS 1 TO 6 DESCRIPTION SHORT CIRCUIT CURRENT LIMITATION L9825 is a Octal Low-Side Driver Circuit, dedicated AND SELECTIVE THERMAL SHUTDOWN AT for automotive applications. Output voltage clamping OUTPUTS 7 AND 8 is provided for flyback current recirculation, when in- OUTPUT STATUS DATA AVAILABLE ON THE ductive loads are driven. Chip Select and Serial Pe- SPI ripheral Interface for outputs control and diagnostic data transfer. Parallel Control inputs for two outputs. BLOCK DIAGRAM V CC V OUT1 CC NON1 1 3 I S OL 2 Latch / Driver Q1 R + Diag1 Fault Latch - V DG CH1 NON2 OUT2 V CC Q2 CH2 Diag2 OUT3 NCS Q1 Q2 Q3 Q3 S I OL Q4 Latch / Driver Q5 V CC R Q6 Q7 Q8 CLK + Diag1 Diag3 - V V DG CH3 CC Diag2 OUT4 Diag3 Q4 CH4 Diag4 SDI Diag4 Diag5 OUT5 Q5 Diag6 CH5 Diag5 Diag7 OUT6 Q6 Diag8 CH6 Diag6 V CC SDO OUT7 Q7 S Latch / Driver V CC I OL Current Control nRES R Reset Reset V CC Overtemperature Detection + Undervoltage - Diag7 V DG CH7 RESET OUT8 Q8 CH8 Diag8 GND September 2013 1/11 SPI Shift Register Interface Output LatchL9825 PIN CONNECTION (Top view) GND 1 GND 20 NON1 2 NCS 19 SDO 3 18 nRes OUT1 4 17 OUT8 OUT3 5 OUT6 16 OUT5 6 15 OUT4 OUT7 7 14 OUT2 SDI 8 Vcc 13 CLK 9 NON2 12 GND 10 11 GND POWSO20 PIN DESCRIPTION N Pin Function 1 GND device ground 2 NON1 control input 1 3 SDO serial data output 4 Out 1 output 1 5 Out 3 output 3 6 Out 5 output 5 7 Out 7 output 7 8 SDI serial data input 9 CLK serial clock 10 GND device ground 11 GND device ground 12 NON2 control input 2 13 V supply voltage CC 14 Out 2 output 2 15 Out 4 output 4 16 Out 6 output 6 17 Out 8 output 8 18 nRes asynchronous nRes 19 NCS chip select (active low) 20 GND device ground 2/11