L9904 Datasheet, PDF (1/17 Pages) STMicroelectronics – MOTOR BRIDGE CONTROLLER

L9904
MOTOR BRIDGE CONTROLLER
PRODUCT PREVIEW
s OPERATING SUPPLY VOLTAGE 8V TO 28V,
OVERVOLTAGE MAX. 40V
s OPERATING SUPPLY VOLTAGE 6V WITH
IMPLEMENTED STEPUP CONVERTER
s QUIESCENT CURRENT IN STANDBY MODE
LESS THAN 50µA
s ISO 9141 COMPATIBLE INTERFACE
s CHARGE PUMP FOR DRIVING A POWER
MOS AS REVERSE BATTERY PROTECTION
s PWM OPERATION FREQUENCY UP TO
30KHZ
s PROGRAMMABLE CROSS CONDUCTION
PROTECTION TIME
s OVERVOLTAGE, UNDERVOLTAGE, SHORT
CIRCUIT AND THERMAL PROTECTION
s REAL TIME DIAGNOSTIC
SO20
ORDERING NUMBER: L9904
DESCRIPTION
Control circuit for power MOS bridge driver in auto-
motive applications with ISO 9141bus interface.
BLOCK DIAGRAM
VS ¹⁰
ST ¹
-
+
= _VSTH
Ref erence
BIAS
fST
VC C
Charge
pump
VC C
Overvoltage
RDG
DG ²
Undervoltage
Thermal shutdown
EN ⁴
REN
V _S1TH =
DIR ⁵
RDI _R
VCC
R _PWM
PWM ³
PR ⁶
Timer
V _S2TH =
RCP
11 _CP
13 _CB1
12 _GH1
14 _S1
R S1
19 _GL1
R _GL1
18 _GL2
R _GL2
17 _S2
R _S2
15 GH2
16 _CB2
RX ⁷
RRX
VCC
RTX
TX ⁸
ISO-Interface
= _{0.5 • VVS}
IKH
9K
20 _GND
October 2002
This is preliminary information on a new product now in development. Details are subject to change without notice.
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