A3985SLDTR-T View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
MFG CO.
'A3985SLDTR-T' PDF : 15 Pages View PDF
A3985
Digitally Programmable
Dual Full-Bridge MOSFET Driver
ELECTRICAL CHARACTERISTICS, continued, at TA = 25°C, VDD = 5 V, VBB = 12 to 50 V, unless noted otherwise
Characteristics
Symbol
Test Conditions
Min. Typ. Max.
Current Control
Blank Time
tBLANK
fMCK = 4 MHz;
Word1:Bits D1 and D2 = 00
–
1
–
Fixed Off-Time
fMCK = 4 MHz,
tOFF Word1:Bits D3 to D7 = 01010, and
D15 = 0
21.75
–
22
Reference Input Voltage
Internal Reference Voltage
Current Trip Point Error2
Reference Input Current1
Internal Oscillator Frequency
Maximum Clock Input Frequency
Master Clock Frequency
Protection
VREF
VREFInt
EITrip
IREF
fOSC
fEXTmax
fMCK
20 kΩ to VDD
VREF = 2 V
ROSC = 10 kΩ
External clock selected
0.8
–
2
1.9
2.0
2.1
–
–
±5
–3
0
3
3.2
4
4.8
–
10
–
0.5
4
5
VREG Undervoltage Lockout
VREG Undervoltage Lockout
Hysteresis
VREGUV Decreasing VREG
VREGUVHys
7.5
8
8.5
100
200
–
VDD Undervoltage Lockout
VDD Undervoltage Lockout
Hysteresis
VDDUV Decreasing VDD
VDDUVHys
2.45
2.7
2.95
50
100
–
Overtemperature Shut Down
Overtemperature Shut Down
Hysteresis
TTSD
TTSDHys
Temperature increasing
Recovery = TTSD – TTSDHys
–
165
–
–
15
–
Units
μs
μs
V
V
%
μA
MHz
MHz
MHz
V
mV
V
mV
ºC
ºC
Continued on the next page...
THERMAL CHARACTERISTICS
Characteristic
Symbol
Package Thermal Resistance
RθJA
Test Conditions*
4-layer PCB, based on JEDEC standard
1-layer PCB with copper limited to solder pads
*Additional thermal information available on Allegro Web site.
Value Units
47 ºC/W
114 ºC/W
Allegro MicroSystems, Inc.
5
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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