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3974 Datasheet(PDF) 4 Page - Allegro MicroSystems

Part No. 3974
Description  DMOS DUAL FULL-BRIDGE PWM MOTOR DRIVER
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

3974 Datasheet(HTML) 4 Page - Allegro MicroSystems

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3974
DMOS DUAL FULL-BRIDGE
PWM MOTOR DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
4
Limits
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Control Logic (continued)
Reference Input Current
I
REF
V
REF = 2.6 V
±1.0
µA
Reference Input Offset Voltage
V
IO
±10
mV
Reference Divider Ratio
V
REF/VS
D16 = 1
10
D16 = 0
5.0
Gain (G
m) Error (note 3)
E
G
V
REF = 2.6 V, D16 = 0
0
±4.0
%
V
REF = 0.5 V, D16 = 0
0
±14
%
V
REF = 2.6 V, D16 = 1
0
±4.0
%
V
REF = 0.5 V, D16 = 1
0
±10
%
Propagation Delay Time
t
pd
50% TO 90%:
PWM change to source on
600
750
1000
ns
PWM change to source off
50
150
350
ns
PWM change to sink on
600
750
1000
ns
PWM change to sink off
50
150
350
ns
Crossover Delay Time
t
COD
SR enabled
300
600
1000
ns
Thermal Shutdown Temperature
T
J
165
°C
Thermal Shutdown Hysteresis
∆T
J
—15—
°C
UVLO Enable Threshold
V
UVLO
Increasing V
DD
3.9
4.2
4.45
V
UVLO Hysteresis
∆V
UVLO
0.05
0.10
V
Logic Supply Current
I
DD
f
PWM < 50 kHz
10
mA
Outputs off
8.0
mA
Idle mode (D18 = 1, D19 = 0)
1.5
mA
Sleep mode (inputs below 0.5 V)
100
µA
NOTES: 1. Typical Data is for design information only.
2. Negative current is defined as coming out of (sourcing) the specified device terminal.
3. E
G = [(VREF/Range) - VS]/(VREF/Range).
ELECTRICAL CHARACTERISTICS at T
A = +25°C, VBB = 50 V, VDD = 5.0 V, fPWM < 50 kHz (unless
otherwise noted), continued.


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