A3950_06 Datasheet, PDF (4/12 Pages) Allegro MicroSystems – DMOS Full-Bridge Motor Driver

A3950
DMOS Full-Bridge Motor Driver
ELECTRICAL CHARACTERISTICS at TJ = 25°C, V_BB = 8 to 36 V, unless noted otherwise
Characteristics
Symbol
Test Conditions
Min. Typ. Max. Units
Motor Supply Current
f_PWM < 50 kHz
I_BB Charge pump on, outputs disabled
Sleep mode
– 6 8.5 mA
– 3 4.5 mA
–
– 10 μA
PHASE, ENABLE, MODE Input
Voltage
SLEEP Input Voltage
PHASE, MODE Input Current¹
ENABLE Input Current
SLEEP Input Current
NFAULT Output Voltage
Input Hysteresis, except SLEEP
Output On Resistance
Body Diode Forward Voltage¹
Propagation Delay Time
V_IH
V_IL
V_IH
V_IL
I_IH
I_IL
I_IH
I_IL
I_IH
I_IL
V_OL
V_IHys
R_DS(on)
V_f
t_pd
V_IN = 2.0 V
V_IN = 0.8 V
V_IN = 2.0 V
V_IN = 0.8 V
V_IN = 2.7 V
V_IN = 0.8 V
I_sink = 1.0 mA
Source driver, I_OUT = -2.8 A, T_J=25°C
Source driver, I_OUT = -2.8 A, T_J=125°C
Sink driver, I_OUT = 2.8 A, T_J=25°C
Sink driver, I_OUT = 2.8 A, T_J=125°C
Source diode, I_f = –2.8 A
Sink diode, I_f = 2.8 A
PWM, change to source or sink ON
PWM, change to source or sink OFF
2.0 – – V
– – 0.8 V
2.7 – – V
– – 0.8 V
– <1.0 20 μA
–20 <–2.0 20 μA
– 40 100 μA
– 16 40 μA
– 27 50 μA
– <1 10 μA
– – 0.4 V
100 150 250 mV
– 0.35 0.48 Ω
– 0.55 0.8 Ω
– 0.3 0.43 Ω
– 0.45 0.7 Ω
– – 1.4 V
– – 1.4 V
– 600 – ns
– 100 – ns
Crossover Delay
Protection Circuitry
t_COD
– 500 – ns
UVLO Threshold
V_UV V_BB increasing
– 6.5 – V
UVLO Hysteresis
V_UVHys
– 250 – mV
Overcurrent Threshold²
I_OCP
3––A
Overcurrent Protection Period
t_OCP
– 1.2 – ms
Thermal Warning Temperature
T_JW Temperature increasing
– 160 – °C
Thermal Warning Hysteresis
T_JWHys Recovery = T_JW – T_JWHys
– 15 – °C
Thermal Shutdown Temperature
T_JTSD Temperature increasing
– 175 – °C
Thermal Shutdown Hysteresis
T_JTSDHys Recovery = T_JTSD – T_JTSDHys
– 15 – °C
1_{For input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin.}
2_{Overcurrent protection is tested at 25°C in a restricted range and guaranteed by characterization.}
THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information
Characteristic
Symbol
Test Conditions*
Preliminary: EU package, 4-layer PCB based on JEDEC standard
Package Thermal Resistance
R_θJA
LP package, 4-layer PCB based on JEDEC standard
LP package, 2-layer PCB with 3.8 in.² copper both sides, connected by
thermal vias
*Additional thermal data available on the Allegro Web site.
Value Units
30 ºC/W
34 ºC/W
43 ºC/W
Allegro MicroSystems, Inc.
4
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com