L9825 Datasheet, PDF (1/11 Pages) STMicroelectronics – Octal Low-side Driver For Resistive and Inductive Loads With Serial / Parallel Input Control, Output Protection and Diagnostic

L9825
Octal Low-side Driver For Resistive and Inductive Loads With
Serial / Parallel Input Control, Output Protection and Diagnostic
PRODUCT PREVIEW
s OUTPUTS CURRENT CAPABILITY UP TO
1A, R_ON ≤ 0,75Ω AT T_J = 25°C
s PARALLEL CONTROL INPUTS FOR
OUTPUTS 1 AND 2
s SPI CONTROL FOR OUTPUTS 1 TO 8
s RESET FUNCTION WITH RESET SIGNAL AT
NRES PIN OR UNDERVOLTAGE AT V_CC
s INTRINSIC OUTPUT VOLTAGE CLAMPING
AT TYP. 50V
s OVERCURRENT SHUTDOWN AT OUTPUTS
1 TO 6
s SHORT CIRCUIT CURRENT LIMITATION
AND SELECTIVE THERMAL SHUTDOWN AT
OUTPUTS 7 AND 8
s OUTPUT STATUS DATA AVAILABLE ON THE
SPI
PowerSO20
ORDERING NUMBER: L9825
DESCRIPTION
L9825 is a Octal Low-Side Driver Circuit, dedicated
for automotive applications. Output voltage clamping
is provided for flyback current recirculation, when in-
ductive loads are driven. Chip Select and Serial Pe-
ripheral Interface for outputs control and diagnostic
data transfer. Parallel Control inputs for two outputs.
BLOCK DIAGRAM
VCC
NON1
VCC
1
3
2
Q1
S _{Latch / Driver}
R
OUT1
IOL
Diag1
NON2
NCS
VCC
Q2
Diag2
VCC
CLK
VCC
SDI
SDO
VCC
Fault Latch
Q1
Q2
Q3
Q3
Q4
Q5
Q6
Q7
Q8
Diag1
Diag2
Diag3
Diag4
Diag5
Diag6
Diag7
Diag8
Diag3
Q4
Diag4
Q5
Diag5
Q6
Diag6
S
Latch / Driver
R
nRES
VCC
Q7
Reset
VCC
Reset
Undervoltage
RESET
Diag7
Q8
Diag8
GND
S _{Latch / Driver}
Current Control
R
Overtemperature Detection
+
-
VDG
CH1
CH2
OUT2
OUT3
IOL
+
- VDG _CH3
CH4
CH5
CH6
OUT4
OUT5
OUT6
OUT7
IOL
+
- VDG _CH7
CH8
OUT8
July 2001
This is preliminary information on a new product now in development. Details are subject to change without notice.
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