L9903 Datasheet, PDF (1/17 Pages) STMicroelectronics – MOTOR BRIDGE CONTROLLER

L9903
MOTOR BRIDGE CONTROLLER
1 FEATURES
■ OPERATING SUPPLY VOLTAGE 8V TO 20V,
OVERVOLTAGE MAX. 40V
■ OPERATING SUPPLY VOLTAGE 6V WITH
IMPLEMENTED STEPUP CONVERTER
■ QUIESCENT CURRENT IN STANDBY MODE
LESS THAN 50µA
■ ISO 9141 COMPATIBLE INTERFACE
■ CHARGE PUMP FOR DRIVING A POWER
MOS AS REVERSE BATTERY PROTECTION
■ PWM OPERATION FREQUENCY UP TO
30KHZ
■ PROGRAMMABLE CROSS CONDUCTION
PROTECTION TIME
■ OVERVOLTAGE, UNDERVOLTAGE, SHORT
CIRCUIT AND THERMAL PROTECTION
■ REAL TIME DIAGNOSTIC
Figure 2. Block Diagram
Figure 1. Package
SO20
Table 1. Order Codes
Part Number
L9903
L9903TR
Package
SO20
Tape & Reel
2 DESCRIPTION
Control circuit for power MOS bridge driver in auto-
motive applications with ISO 9141bus interface.
VS ¹⁰
ST ¹
-
+
= _VSTH
Reference
BIAS
fST
VCC
Charge
pump
VCC
Overvolt age
RDG
DG ²
Undervoltage
Thermal shutdown
EN ⁴
REN
V _S1TH =
DIR ⁵
RDIR
VCC
R PWM
PWM ³
PR ⁶
Timer
V _S2TH =
RCP
11 _CP
13 _CB1
12 _GH1
14 _S1
RS1
19 _GL1
RGL1
18 _GL2
RGL2
17 _S2
RS2
15 GH2
16 _CB2
RX ⁷
R RX
VCC
R TX
TX ⁸
ISO-I nt erface
= 0.5 • VVS
I _KH
9K
20 _GND
October 2005
REV. 4
1/17