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PDF L9524C Data sheet ( Hoja de datos )
| Número de pieza | L9524C | |
| Descripción | Glow Plug System Control IC | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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L9524C
Glow plug system control IC
Features
■ Quad gate driver for external n-channel power
MOSFETs in high-side configuration:
– Gates driven by PWM output signal
– Adjustable gate charge/discharge currents
– Limited gate-to-source voltages
– Negative clamping for inductive loads
– Advanced run-off control
– Regulation of the power through the glow
plugs
■ Control output for external relay driver
■ Battery-voltage-compatible two-wire interface
■ Supply voltage monitoring with shutdown
■ Battery voltage monitoring with shutdown
■ Junction temperature monitoring with
shutdown
■ Monitoring of currents through the glow plugs
with shutdown at overcurrent (adjustable
threshold)
■ Monitoring of external switches
■ Charge pump voltage monitoring with
shutdown
■ Active clamping during load dump
Order codes
SO24
Description
The L9524C is a control IC for up to six glow
plugs of diesel engines. The glow plugs are
switched by up to four external PWM-controlled n-
channel power MOSFETs or a single relay in
high-side configuration. Supply voltage, battery
voltage, junction temperature, switches, currents
through the glow plugs, and charge pump voltage
are monitored. A two-wire interface is used to
communicate with the diesel engine management
system.
Part number
L9524C-TR
Package
SO24
Packing
Tape & reel
September 2006
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Rev 1
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L9524C
1 Block diagram
Figure 1. Block Diagram
Block diagram
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L9524C
Table 4. Electrical characteristics (continued)
Item Symbol
Parameter
Test Condition
11.2 RSN1-4 Input resistance
Overcurrent threshold setting (OCT)
6V ≤ VSNX = VSPX ≤ 20V
12.1
IOCT Input pull-up current
VVS ≥ 6V
VOCT = 3.5V
Power MOSFET gate charge/discharge current setting (CUR)
13.1
13.2
VCUR
ICUR max
Output voltage
Current limitation
Input pin for mode selection (MS)
ICUR ≥ -150μA
VCUR ≤ 2V
14.1
14.2
14.3
IMS
VMS tr
VMS tc
Pull-up current
Transistor mode
threshold
Temperature
compensation threshold
VMS = 3V
VVS ≥ 6V
Output timing
15.1
tdel
15.2
tgap
Delay time (2)
Gap between channels
(2)
15.3
tsup
Power regulation
Failure suppress time (2)
16.1 ΔVRMS Accuracy
8V ≤ VBAT ≤ 16V
30ms ≤ TCI ≤ 33ms
tCI on/TCI ≥ 20%
1. not tested, guaranteed by design
2. time constants created digitally, verified by scan path test
Electrical specifications
Min.
40
Typ.
Max.
160
Unit
kΩ
-40 -10 μA
2.35 2.5 2.65 V
-500
-250 μA
-60 -15 μA
1 2V
3 4V
2.5
50
400
-1.5%
·
VRMSr
ef
5 ms
250 μs
950 μs
1.5% ·
VRMSr
ef
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| PDF Descargar | [ Datasheet L9524C.PDF ] | |
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