A3986 Datasheet, PDF (5/16 Pages) Allegro MicroSystems – Dual Full-Bridge MOSFET Driver with Microstepping Translator

A3986
Dual Full-Bridge MOSFET Driver
with Microstepping Translator
ELECTRICAL CHARACTERISTICS, continued, at T_A = 25°C, V_DD = 5 V, V_BB = 12 to 50V, unless noted otherwise
Characteristics
Symbol
Test Conditions
Min. Typ. Max. Units
Current Control
Blank Time
Fixed Off-Time
Reference Input Voltage
Internal Reference Voltage
Current Trip Point Error³
Reference Input Current¹
Oscillator Frequency
Protection
t_BLANK
t_OFF
V_REF
V_REFInt
E_ITRIP
I_REF
f_OSC
R_OSC = 10 kΩ,
R_OSC = 10 kΩ, , SR= High
20 kΩ to V_DD
V_REF = 2 V
R_OSC = 10 kΩ
1.2
1.5
1.8 μs
18.12
–
23.16 μs
0.8
–
2
V
1.9
2.0
2.1
V
–
–
±5
%
–3
0
3
μA
3.2
4
4.8 MHz
VREG Undervoltage Lockout
VREG Undervoltage Lockout
Hysteresis
V_REGUV Decreasing V_REG
V_REGUVHys
7.5
8
8.5
V
100
200
–
mV
VDD Undervoltage Lockout
VDD Undervoltage Lockout
Hysteresis
V_DDUV Decreasing V_DD
V_DDUVHys
2.45
2.7
2.95 V
50
100
–
mV
Overtemperature Shut Down
Overtemperature Shut Down
Hysteresis
T_TSD
T_TSDHys
Temperature increasing
Recovery = T_TSD – T_TSDHys
–
165
–
ºC
–
15
–
ºC
Control Timing
STEP Low Duration
STEP High Duration
Setup Duration
t_STEPL
t_STEPH
t_SU
Input change to STEP pulse;
MS1, MS2, DIR
1
–
1
–
200
–
–
μs
–
μs
–
ns
Hold Duration
t_H
Input change from STEP pulse;
MS1, MS2, DIR
200
–
–
ns
Wake Time Duration
t_WAKE
1
–
–
ms
1_{For input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin.}
2_{A RESET pulse of this duration will reset the translator to the Home position without entering Sleep mode.}
3_{Current Trip Point Error is the difference between actual current trip point and the target current trip point, referred to full}
scale (100%) current: E_ITRIP = 100 × (I_TRIPActual – I_TRIPTarget) / I_{FullScale %}
Allegro MicroSystems, Inc.
5
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com