A3985 Allegro MicroSystems, Inc., A3985 Datasheet - Page 5

• Manufacturer Part Number: A3985
• Description: Digitally Programmable Dual Full-Bridge MOSFET Driver
• Manufacturer: Allegro MicroSystems, Inc.

A3985
Continued on the next page...
THERMAL CHARACTERISTICS
ELECTRICAL CHARACTERISTICS, continued, at T
Current Control
Blank Time
Fixed Off-Time
Reference Input Voltage
Internal Reference Voltage
Current Trip Point Error
Reference Input Current
Internal Oscillator Frequency
Maximum Clock Input Frequency
Master Clock Frequency
Protection
VREG Undervoltage Lockout
VREG Undervoltage Lockout
Hysteresis
VDD Undervoltage Lockout
VDD Undervoltage Lockout
Hysteresis
Overtemperature Shut Down
Overtemperature Shut Down
Hysteresis
Package Thermal Resistance
*Additional thermal information available on Allegro Web site.
Characteristics
Characteristic
2
1
V
V
Symbol
V
REGUVHys
T
f
V
V
t
DDUVHys
EXTmax
TSDHys
BLANK
V
E
REGUV
T
Symbol
f
f
t
I
REFInt
DDUV
OSC
MCK
OFF
REF
TSD
REF
ITrip
R
θJA
f
Word1:Bits D1 and D2 = 00
f
Word1:Bits D3 to D7 = 01010, and
D15 = 0
20 kΩ to V
V
R
External clock selected
Decreasing V
Decreasing V
Temperature increasing
Recovery = T
MCK
MCK
REF
OSC
4-layer PCB, based on JEDEC standard
1-layer PCB with copper limited to solder pads
= 4 MHz;
= 4 MHz,
A
= 2 V
= 10 kΩ
= 25°C, V
DD
Dual Full-Bridge MOSFET Driver
Test Conditions
TSD
REG
DD
DD
– T
= 5 V, V
TSDHys
Test Conditions*
BB
= 12 to 50 V, unless noted otherwise
Digitally Programmable
21.75
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
Min.
2.45
100
0.8
1.9
3.2
0.5
7.5
–3
50
–
–
–
–
–
Typ.
200
100
165
2.0
2.7
10
15
1
–
–
–
0
4
4
8
Max.
Value Units
2.95
2.1
4.8
8.5
114
22
±5
47
–
2
3
–
5
–
–
–
–
Units
ºC/W
ºC/W
MHz
MHz
MHz
mV
mV
μA
μs
μs
ºC
ºC
%
V
V
V
V
5