Datasheet

ELECTRICAL CHARACTERISTICS (V
s
= 42V ; T
j
= 25°C unless otherwise specified)
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
S
Supply Voltage 7 52 V
V
ref
Reference Voltage 10 V
I
S
Quiescent Supply Current 6.5 mA
T
S
Thermal Shutdown 150 °C
T
D
Dead Time Protection 300 ns
OUTPUT DMOS TRANSISTOR
Symbol Parameter Test Condition Min. Typ. Max. Unit
I
DSS
Leakage Current 1mA
R
DS (ON)
ON Resistance 0.3
Ω
SOURCE DRAIN DIODE
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
SD
Forward ON Voltage I
SD
= 4A; EN = LOW
1.2 V
T
RR
Reverse Recovery Time I
F
= 4A
900 ns
T
pr
Forward Recovery Time
200 ns
LOGIC LEVELS
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
INL
, V
ENL
Input LOW Voltage
-0.3 0.8 V
V
INH
, V
ENH
Input HIGH Voltage
27V
I
INL,
I
ENL
Input LOW Current V
IN
,V
EN
= L
-10
µ
A
I
INH,
I
ENH
Input HIGH Current VIN,V
EN
= H
30
µ
A
CIRCUIT DESCRIPTION
L6234 is a triple half bridge designed to drive
brushless DC motors.
Each half bridge has 2 power DMOS transistors
with R
ds
ON = 0.3Ω. The 3 half bridges can be
controlled independently by means of the 3 inputs
IN1, IN2, IN3 and the 3 inputs EN1, EN2, and
EN3. An external connection to the 3 common
low side DMOS sources is provided to connect a
sensing resistor for constant current chopping ap-
plication.
The driving stage and the logic stage are de-
signed to work from 7V to 52V.
L6234
5/10