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STMicroelectronics Electronic Components Datasheet

L634 Datasheet

THREE PHASE MOTOR DRIVER

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L634 pdf
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® L6234
THREE PHASE MOTOR DRIVER
SUPPLY VOLTAGE FROM 7 TO 52V
5A PEAK CURRENT
RDS ON 0.3TYP. VALUE AT 25°C
CROSS CONDUCTION PROTECTION
TTL COMPATIBLE DRIVER
OPERATING FREQUENCY TO 50KHz
THERMAL SHUTDOWN
INTRINSIC FAST FREE WHEELING DIODES
INPUT AND ENABLE FUNCTION FOR
EVERY HALF BRIDGE
10V EXTERNAL REFERENCE AVAILABLE
POWER DIP (16+2+2)
PowerSO20
DESCRIPTION
The L6234 is a triple half bridge to drive a
brushless motor.
It is realized in Multipower BCD technology which
combines isolated DMOS power transistors with
CMOS and Bipolar circuits on the same chip.
By using mixed technology it has been possible to
optimize the logic circuitry and the power stage to
achieve the best possible performance.
The output DMOS transistors can sustain a very
high current due to the fact that the DMOS struc-
ture is not affected by the second breakdown ef-
PIN CONNECTION (Top view)
ORDERING NUMBERS: L6234 (POWER DIP 16+2+2)
L6234PD (PowerSO20)
fect, the RMS maximum current is practically lim-
ited by the dissipation capability of the package.
All the logic inputs are TTL, CMOS and µP com-
patible. Each channel is controlled by two sepa-
rate logic input.
L6234 is available in 20 pin POWER DIP package
(16+2+2) and in PowerSO20.
OUT1
IN1
EN1
VS
GND
GND
VS
EN3
IN3
OUT3
1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
D98IN848
OUT2
IN2
EN2
SENSE1
GND
GND
SENSE2
VBOOT
VCP
VREF
POWER DIP (16+2+2)
August 2003
GND
SENSE1
EN2
IN2
OUT2
OUT1
IN1
EN1
VS
GND
1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
D94IN129A
PowerSO20
GND
SENSE2
VBOOT
Vcp
VREF
OUT3
IN3
EN3
VS
GND
1/10


STMicroelectronics Electronic Components Datasheet

L634 Datasheet

THREE PHASE MOTOR DRIVER

No Preview Available !

L634 pdf
L6234
BLOCK DIAGRAM
10nF
VCP
CHARGE
PUMP
IN1
1µF
VREF
EN1
IN2
EN2
IN3
THERMAL
PROTECTION
EN3
VBOOT
VREF=
10V
GND
Vs 7
to 52V
TH1
OUT1
TL1
0.22µF
1N4148
0.1 100µF
µF
TH2
OUT2
TL2
SENSE1
TH3
OUT3
TL3
SENSE2
D95IN309A
RSENSE
2/10


Part Number L634
Description THREE PHASE MOTOR DRIVER
Maker ST Microelectronics
Total Page 10 Pages
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