Power management for automotive systems
Transceiver
Voltage regulators
Driver stages
Part number
Package
On-board features
Description
Transmission Transceiver
Drop voltage
VDP (typ) (mV)
Outputs
Accuracy
Reset Watchdog Outputs Driver description
rate
description
Fault tolerant
250 @ ILOAD
= 100 mA
L4969URD-E
L4969UR-E
SO‑20
125 kbaud low‑speed CAN 5 V @ 200mA
2 ꢀ
•
•
•
•
System basic chip
System basic chip
transceiver
Fault tolerant
125 kbaud low‑speed CAN 5 V @ 200mA
transceiver
400 @ ILOAD
= 150 mA
PowerSO‑20
2 ꢀ
2 ꢀ
300 @ ILOAD
= 100 mA
4 wake‑up inputs for
contact monitoring
Fail‑safe output
5 V @ 250mA
4
1
2
HSD 1Ω @ 120 mA
Power
L9952GXP
PowerSSO‑36
20 kbaud LIN transceiver
5 V @ 100mA
•
•
HSD 1Ω @ 400 mA Two op‑amps for current management IC
400 @ ILOAD
= 50 mA
sense interfacing
Inhibit input for wake up
from external CAN
with LIN
4ꢀ
2ꢀ
Relay drivers (2 Ω)
HSD 1 Ω @ 120 mA
Complete 3‑channel
contact monitoring
interface with
programmable cyclic
sense functionality
4
1
2
300 @ ILOAD
= 100 mA
5 V @ 250mA
Power
LIN and HS CAN
20 kbaud
management IC
with LIN and high‑
speed CAN
L99PM62GXP PowerSSO‑36
•
•
•
•
HSD 1 Ω @ 400 mA 4 internal PWM timers
Two op‑amps with rail‑
transceivers
to‑rail outputs (VS) and
low voltage inputs
4 ꢀ (3ꢀ 400 @ ILOAD
5 V @ 100mA
Relay drivers (2 Ω)
Programmable periodic
@ 50 mA)
= 50 mA
system wake up feature
Configurable fail‑safe
output
ST SPI interface for mode
control and diagnostics
Direct drive feature
for HSD
2
2
HSD 7Ω @ 60 mA
Relay drivers (2 Ω)
Power
management IC
with LIN
300 @ ILOAD
= 100 mA
L99PM60J
PowerSSO‑16
20 kbaud LIN transceiver 5 V @ 100mA
2 ꢀ
13
STMICROELECTRONICS [ ST ]
