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3974 Datasheet(PDF) 3 Page - Allegro MicroSystems

Part # 3974
Description  DMOS DUAL FULL-BRIDGE PWM MOTOR DRIVER
Download  12 Pages
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

3974 Datasheet(HTML) 3 Page - Allegro MicroSystems

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3974
DMOS DUAL FULL-BRIDGE
PWM MOTOR DRIVER
3
www.allegromicro.com
ELECTRICAL CHARACTERISTICS at T
A = +25°C, VBB = 50 V, VDD = 5.0 V, fPWM < 50 kHz (unless
otherwise noted).
Limits
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Output Drivers
Load Supply Voltage Range
V
BB
Operating
15
50
V
During sleep mode
0
50
V
Output Leakage Current
I
DSS
V
OUT = VBB
<1.0
20
µA
V
OUT = 0 V
<-1.0
-20
µA
Output ON Resistance
r
DS(on)
Source driver, I
OUT = -1.5 A
0.5
0.55
Sink driver, I
OUT = 1.5 A
0.315
0.35
Body Diode Forward Voltage
V
F
Source diode, I
F = 1.5 A
1.2
V
Sink diode, I
F = 1.5 A
1.2
V
Load Supply Current
I
BB
f
PWM < 50 kHz
4.0
7.0
mA
Charge pump on, outputs disabled
2.0
5.0
mA
Sleep or idle mode
20
µA
Control Logic
Logic Supply Voltage Range
V
DD
Operating
4.5
5.0
5.5
V
Logic Input Voltage
V
IN(1)
2.0
V
V
IN(0)
0.8
V
Logic Input Current
I
IN(1)
V
IN = 2.0 V
<1.0
±20
µA
(except ENABLE)
I
IN(0)
V
IN = 0.8 V
<1.0
±20
µA
ENABLE Input Current
I
EN(1)
V
EN = 2.0 V
40
100
µA
I
EN(0)
V
EN = 0.8 V
16
30
µA
OSC Input Frequency
f
OSC
2.9
6.1
MHz
OSC Input Duty Cycle
40
60
%
OSC Input Hysterisis
∆V
IN
200
400
mV
Reference Input Voltage Range
V
REF
Operating
0
2.6
V
continued next page ...


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