Dual DMOS Full Bridge Motor Driver
With Serial Port Control and Dual Regulators
A3998
4
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
ELECTRICAL CHARACTERISTICS
1,2
Valid at T
J
= 25°C, V
BB
= 50 V; unless otherwise specified
Characteristics Symbol Test Conditions Min. Typ.
3
Max. Unit
Load Supply Voltage Range V
BB
Operating 9 – 50 V
Bridge Output On-Resistance R
DS(on)RG
Source driver, I
OUT
= –1.5 A – 0.5 –
Sink driver, I
OUT
= 1.5 A – 0.5 –
VBB Pins Supply Current
I
BB
V
REG
regulated, I
OUT
= 0 mA, outputs on,
PWM = 50 kHz, Duty Cycle = 50%
– 5 10 mA
I
BBS
Standby mode, regulator active – – 5 mA
VIN Pin Supply Current I
IN
– 5 8 mA
Control Logic
Logic Inputs Voltage Range V
IO
Operating 3 – 5.5 V
Logic Input Voltage
V
IO(1)
V
DD
× 0.55 – – V
V
IO(0)
– – V
DD
× 0.27 V
Logic Pins Input Current (Except
ENB1,ENB2, FRST pins)
I
IO
V
IN
= 0 to 5 V –20 <1.0 20 A
ENB1,ENB2, FRST Pins Input Current
I
IO(1)
V
IN
= 3.3 V – 66 100 A
I
IO(0)
V
IN
= 0.8 V – 16 40 A
Input Hysteresis V
IOHYS
200 – 700 mV
Propagation Delay Time t
pd
PWM change to source on 350 550 1000 ns
PWM change to source off 35 – 250 ns
PWM change to sink on 350 550 1000 ns
PWM change to sink off 35 – 250 ns
Crossover Delay t
COD
300 425 1000 ns
Supply Monitor
Reset Timer t
POR
70 100 130 ms
RSTN and PMON Pins Output
Voltage
V
RST
I
OUT
= 1 mA – – 0.5 V
RSTN and PMON Pins Output
Leakage Current
I
leakage
V
OUT
= 5 V – – 1 A
Power Monitor Threshold V
PM(th)
PMON pin, V
BB
falling 12 13 14 V
Power Monitor Hysteresis V
PMHYS
– 2 – V
Protection Circuits
VIN Pin UVLO Threshold V
INUV(th)
V
IN
rising – 2.8 3 V
VIN Pin UVLO Hysteresis V
INUVHYS
– 100 – mV
VBB Pins UVLO Threshold V
BBUV(th)
V
BB
rising 6.6 7.1 7.6 V
VBB Pins UVLO Hysteresis V
BBUVHYS
0.7 0.9 1.1 V
FB1 Pin UVLO Threshold V
FBUV(th)
V
FB
falling 698 735 772 mV
FB1 Pin UVLO Hysteresis V
FBUVHYS
– 100 – mV
Thermal Shutdown Temperature T
JSD
155 165 175 °C
Thermal Shutdown Hysteresis T
JSDHYS
– 20 – °C
Continued on the next page…
