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L9826_02

Octal Low-Side Driver for resistive and inductive loads with serial/parallel input control, output protection and diagnostic

STMicroelectronics 

L9826

The fault condition 1) "output short circuit to Vbat" : the output was switched on and the voltage at the output

exceeded the diagnostics threshold due to overcurrent, the output overload latch was set and the output has

been switched off. The diagnostic bit is high.

Fault condition 2) "open load" or "output short circuit to GND" is the same as of outputs 1 and 2.

At the falling edge of NCS the output status data are transferred to the shift register. When NSC is low, data bits

contained in the shift register are transferred to SDO output et every rising CLK edge.

Figure 3. The Pulse Diagram to Read the Outputs Status Register

NCS

CLK

SDO

SDI

MSB 6 5 4 3 2 1 LSB

MSB 6 5 4 3 2 1 LSB

Figure 4. The Structure of the Outputs Status Register

MSB

LSB

Diag2 Diag4 Diag6 Diag8 Diag1 Diag3 Diag5 Diag7

Diagnostic-bit output 7

Diagnostic-bit output 5

Diagnostic-bit output 3

Diagnostic-bit output 1

Diagnostic-bit output 8

Diagnostic-bit output 6

Diagnostic-bit output 4

Diagnostic-bit output 2

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