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3961

DUAL FULL-BRIDGE PWM MOTOR DRIVER

Allegro MicroSystems 

3961

DUAL FULL-BRIDGE

PWM MOTOR DRIVER

ELECTRICAL CHARACTERISTICS at TA = +25°C, VBB = 45 V, VCC = 4.75 V to 5.25 V, VSENSE = 0

V, 30 kW & 1000 pF RC to Ground (unless noted otherwise) (cont.)

Characteristic

Symbol Test Conditions

Min.

Limits

Typ. Max.

Units

Control Logic (Continued)

Reference Output Current

Ref. Input Offset Current

Comparator Input Offset Volt.

Comparator Input Volt. Range

PWM RC Fixed Off-time

PWM Propagation Delay Time

PWM Minimum On Time

Propagation Delay Times

Thermal Shutdown Temp.

Thermal Shutdown Hysteresis

UVLO Disable Threshold

UVLO Hysterisis

Logic Supply Current

Logic Supply Current

Temperature Coefficient

IREF OUT 3 kΩ ≤ RD = R1 + R2 ≤ 15 kΩ

90

IOS

VREF IN = 1 V

-2.5

VIO

VREF = 0 V

-5.0

VREF Operating

-0.3

tOFF RC CT = 1000 pF, RT = 30 kΩ

27

tPWM Comparator Trip to Source OFF

—

tON(min) CT = 1000 pF ± 5%, RT ≥ 15 kΩ, VCC = 5 V —

tpd

IOUT = ±800 mA, 50% to 90%:

ENABLE ON to Source ON

—

ENABLE OFF to Source OFF

—

ENABLE ON to Sink ON

—

ENABLE OFF to Sink OFF

—

PHASE Change to Sink ON

—

PHASE Change to Source ON

—

PHASE Change to Sink OFF

—

PHASE Change to Source OFF

—

TJ

—

∆TJ

—

2.5

0.7

ICC(ON)

VENABLE1 = VENABLE2 = 0.8 V

—

ICC(OFF) VENABLE1 = VENABLE2 = 2.4 V

—

∆ICC(ON) VENABLE1 = VENABLE2 = 0.8 V

—

NOTES: 1. Typical Data is for design information only.

2. Negative current is defined as coming out of

(sourcing) the specified device terminal.

—

900

µA

0

1.0

µA

0

5.0

mV

—

1.0

V

30

33

µs

1.2

2.0

µs

2.5

3.6

µs

3.2

1.2

3.2

0.7

3.2

3.2

0.7

1.2

165

15

2.7

0.9

65

11

0.18

—

µs

—

µs

—

µs

—

µs

—

µs

—

µs

—

µs

—

µs

—

˚C

—

˚C

2.9

V

1.1

V

85

mA

15

—

mA/˚C

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

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