Datasheet
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
S
Power Supply Voltage 52 V
V
IN
,V
EN
Input Enable Voltage – 0.3 to 7 V
I
peak
Pulsed Output Current (note 1) 5 A
V
SENSE
Sensing Voltage (DC Voltage) -1 to 4 V
V
b
Bootstrap Peak Voltage 62 V
V
OD
Differential Output Voltage (between any of the 3 OUT pins) 60 V
f
C
Commutation Frequency 50 KHz
V
REF
Reference Voltage 12 V
P
tot
Total Power Dissipation
L6234PD
T
amb
= 70
°
C 2.3 W
P
tot
Total Power Dissipation
L6234
T
amb
= 70
°
C 1.6 (*) W
T
stg
, T
j
Storage and Junction Temperature Range -40 to 150
°
C
Note 1: Pulse width limited only by junction temperature and the transient thermal impedance
(*) Mounted on board with minimized copper area
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Value Unit
V
S
Supply Voltage 7 to 42 V
V
OD
Peak to Peak Differential Voltage (between any of the 3 OUT
pins)
52 V
I
out
DC Output Current Power SO20 (T
amb
= 25°C) 4 A
DC Output Current Power DIP (T
amb
= 25°C) with infinite heatsink 2.8 A
V
SENSE
Sensing Voltage (pulsed t
w
< 300nsec) -4 to 4 V
Sensing Voltage (DC) -1 to 1 V
T
j
Junction Temperature Range -40 to 125
°
C
PIN FUNCTIONS
Powerdip PowerSO20 Name Function
1
20
10
6
5
15
OUT 1
OUT 2
OUT 3
Output of the channels 1/2/3.
2
19
9
7
4
14
IN 1
IN 2
IN 3
Logic input of channels 1/2/3. A logic HIGH level (when the corresponding
EN pin is HIGH) switches ON the upper DMOS Power Transistor, while a
logic LOW switches ON the corresponding low side DMOS Power.
3
18
8
8
3
13
EN 1
EN 2
EN 3
Enable of the channels 1/2/3. A logic LOW level on this pin switches off both
power DMOS of the related channel.
4,7 9, 12 V
s
Power Supply Voltage.
14 19 SENSE2 A resistance Rsense connected to this pin provides feedback for motor
current control for the bridge 3.
17 2 SENSE1 A resistance Rsense connected to this pin provides feedback for motor
current control for the bridges 1 and 2.
11 16 V
ref
Internal Voltage Reference. A capacitor connected from this pin to GND
increases the stability of the Power DMOS drive circuit.
12 17 V
cp
Bootstrap Oscillator. Oscillator output for the external charge pump.
13 18 V
BOOT
Overvoltage input to drive the upper DMOS
5,6
15,16
1,10
11,20
GND Common Ground Terminal. In Powerdip and SO packages these pins are
used to dissipate the heat forward the PCB.
L6234
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