L9826_05 STMICROELECTRONICS [STMicroelectronics], L9826_05 Datasheet - Page 11

• Manufacturer Part Number: L9826_05
• Description: Octal Low-Side Driver for Resistive and Inductive Loads with Serial/Parallel Input Control, Output Protection and Diagnostic
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

L9826
4.3
Outputs Control Tables :
Table 5.
Figure 5.
Power outputs characteristics
for flyback current, outputs short circuit protection and diagnostics
For output currents flowing into the circuit the output voltages are limited. The typical value of
this voltage is 50V. This function allows that the flyback current of a inductive load recirculates
into the circuit; the flyback energy is absorbed in the chip.
Output short circuit protection for outputs 3 to 8 (dedicated for loads without inrush current):
when the output current exceeds the short circuit threshold, the corresponding output overload
latch is set and the output is switched off immediately.
Output short circuit protection for outputs 1 and 2 (dedicated for loads with inrush current, as
lamps): when the load current would exceed the short circuit limit value, the corresponding
output goes in a current regulation mode.
The output current is determined by the output characteristics and the output voltage depends
on the load resistance. In this mode high power is dissipated in the output transistor and its
temperature increases rapidly. When the power transistor temperature exceeds the thermal
shutdown threshold, the overload latch is set and the corresponding output switched off.
For the load diagnostic in output off condition each output features a diagnostic current sink, typ
60µA.
Outputs 1, 2:
SPI-bit 1, 2
Output 1, 2
NON1, 2
Output control register structure
MSB
Q2
off
1
0
Q4
Q6
on
0
0
Q8
Q1
CD00002120
on
0
1
Q3
Q5
on
1
1
LSB
Q7
Control-bit output 7
Control-bit output 5
Control-bit output 3
Control-bit output 1
Control-bit output 8
Control-bit output 6
Control-bit output 4
Control-bit output 2
Outputs 3 to 8:
SPI-bit 3 ... 8
Output 3 ... 8
4 Functional Description
off
0
on
1
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