L9825_03 STMICROELECTRONICS [STMicroelectronics], L9825_03 Datasheet

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L9825_03

Manufacturer Part Number
L9825_03
Description
Octal Low-side Driver For Resistive and Inductive Loads With Serial / Parallel Input Control, Output Protection and Diagnostic
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
BLOCK DIAGRAM
April 2003
Serial / Parallel Input Control, Output Protection and Diagnostic
1A, R
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
INTRINSIC OUTPUT VOLTAGE CLAMPING
AT TYP. 50V
OVERCURRENT SHUTDOWN AT OUTPUTS
1 TO 6
SHORT CIRCUIT CURRENT LIMITATION
AND SELECTIVE THERMAL SHUTDOWN AT
OUTPUTS 7 AND 8
OUTPUT STATUS DATA AVAILABLE ON THE
SPI
OUTPUTS CURRENT CAPABILITY UP TO
Octal Low-side Driver For Resistive and Inductive Loads With
ON
0,75
NON1
NON2
nRES
NCS
SDO
CLK
AT T
SDI
V CC
V CC
V CC
J
V CC
V CC
= 25°C
Undervoltage
Diag1
Diag2
Reset
RESET
V CC
Q1
Q2
V CC
V CC
GND
Reset
Diag1
Diag2
Diag3
Diag4
Diag5
Diag6
Diag7
Diag8
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
1
2
3
Diag3
Diag4
Diag5
Diag6
Diag7
Diag8
CC
Q7
Q8
Q3
Q4
Q5
Q6
Fault Latch
S
Latch / Driver
Current Control
S
S
Overtemperature Detection
Latch / Driver
Latch / Driver
R
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.
R
R
ORDERING NUMBER: L9825
+
+
+
-
-
-
V DG
V DG
V DG
PowerSO20
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
I OL
I OL
I OL
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
L9825
1/11

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L9825_03 Summary of contents

Page 1

Octal Low-side Driver For Resistive and Inductive Loads With Serial / Parallel Input Control, Output Protection and Diagnostic OUTPUTS CURRENT CAPABILITY UP TO 1A 25° PARALLEL CONTROL INPUTS FOR OUTPUTS 1 AND 2 ...

Page 2

L9825 PIN CONNECTION (Top view) GND NON1 SDO OUT1 OUT3 OUT5 OUT7 GND PIN DESCRIPTION N° Pin 1 GND device ground 2 NON1 control input 1 3 SDO serial data output 4 Out 1 output 1 5 Out 3 output ...

Page 3

ABSOLUTE MAXIMUM RATINGS For voltages and currents applied externally to the device: Symbol V Supply voltage CC Inputs and data lines (NONx, NCS, CLK, SDI, nRes) V Voltage (NONx, NCS, CLK, SDI Voltage (nRes Protection ...

Page 4

L9825 ELECTRICAL CHARACTERISTCS (4.5V V 5.5V; -40° Symbol Parameter Supply voltage I Standby current ccSTB I Operating mode ccOPM I I during reverse output CC CC current Inputs (NONx. NCS, CLK, SDI, nRes) V Low level INL ...

Page 5

ELECTRICAL CHARACTERISTCS (continued) (4.5V V 5.5V; -40° Symbol Parameter Diagnostics V Diagnostic threshold voltage DG I Open load detection sink current OL t Diagnostic detection filter time for df output 1 & each diagnostic condition ...

Page 6

L9825 FUNCTIONAL DESCRIPTION General The L9825 integrated circuit features 8 power low-side-driver outputs. Data is transmitted to the device using the Serial Peripheral Interface, SPI protocol. Outputs 1 and 2 can be controlled parallel or serial. The power outputs features ...

Page 7

Figure 2. Output Control register structure MSB Q2 Q4 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 ...

Page 8

L9825 Fault condition 2) "open load" or "output short circuit to GND" : the output is switched off and the voltage at the output drops below the diagnostics threshold, because the load current is lower than the output diagnostic cur- ...

Page 9

APPLICATION NOTES Figure 5. Typical Application Circuit Diagram L9825 L9825 For higher current driving capability two outputs of the same kind can be paralleled. In this case the maximum flyback energy should not exceed the limit value for single output. ...

Page 10

L9825 mm DIM. MIN. TYP. MAX. MIN. A 3.6 a1 0.1 0.3 0.004 a2 3 0.1 0.000 b 0.4 0.53 0.016 c 0.23 0.32 0.009 D (1) 15.8 16 0.622 D1 9.4 9.8 0.370 E 13.9 14.5 0.547 ...

Page 11

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. ...

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