L6234
THREE PHASE MOTOR DRIVER
SUPPLY VOLTAGE FROM 7 TO 52V
5A PEAK CURRENT
R
DS ON
0.3鈩?TYP. VALUE AT 25擄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
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)
POWER DIP (16+2+2)
PowerSO20
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
碌
P 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
V
S
GND
GND
V
S
EN3
IN3
OUT3
1
2
3
4
5
6
7
8
9
10
D98IN848
20
19
18
17
16
15
14
13
12
11
OUT2
IN2
EN2
SENSE1
GND
GND
SENSE2
VBOOT
VCP
VREF
GND
SENSE1
EN2
IN2
OUT2
OUT1
IN1
EN1
V
S
GND
1
2
3
4
5
6
7
8
9
10
D94IN129A
20
19
18
17
16
15
14
13
12
11
GND
SENSE2
V
BOOT
V
cp
V
REF
OUT3
IN3
EN3
V
S
GND
POWER DIP (16+2+2)
PowerSO20
March 1998
1/10