A3935 Allegro MicroSystems, Inc., A3935 Datasheet - Page 4

• Manufacturer Part Number: A3935
• Description: Three-Phase Power MOSFET Controller
• Manufacturer: Allegro MicroSystems, Inc.

4
ELECTRICAL CHARACTERISTICS:
V
Characteristics
Power Supply
V
V
Battery Voltage Operating Range
Bootstrap Diode Forward Voltage
Bootstrap Diode Resistance
Bootstrap Diode Current Limit
Bootstrap Quiescent Current
Bootstrap Refresh Time
VREG Output Voltage
VREG Dropout Voltage
Gate Drive Avg. Supply Current
VREG Input Bias Current
Boost Supply
V
V
Boost Switch ON Resistance
Max. Boost Switch Current
Boost Current Limit Threshold Volt.
OFF Time
Blanking Time
NOTES: Typical Data and Typical Characteristics are for design information only.
3935
THREE-PHASE POWER
MOSFET CONTROLLER
DD
BAT
BOOST
BOOST
DD
Supply Current
= 4.75 V to 5.25 V, ENABLE = 22.5 kHz, 50% Duty Cycle, Two Phases Active.
Supply Current
Output Voltage Limit
Output Volt. Limit Hyst.
Negative current is defined as coming out of (sourcing) the specified device terminal.
1. For V
2. With V
BOOSTM
BOOST
1
2
< V
decreasing Dropout Voltage measured at V
BOOST
< 40 V power dissipation in the V
Symbol
I
V
I
V
V
BOOSTSW
V
r
REGBIAS
r
t
V
V
V
BOOSTM
DBOOT
t
refresh
I
DS(on)
I
DBOOT
REGDO
BOOSTM
I
blank
I
I
REG
BAT
t
BI(th)
DD
DM
REG
BAT
CX
off
unless otherwise noted at T
Conditions
All logic inputs = 0 V
All logic inputs = 0 V
I
I
r
3 V < [V
V
V
0.47 µF Boot Cap at V
V
V
No external dc load at VREG, C
Current into V
V
I
Increasing V
DBOOT
DBOOT
BOOSTD
D
CX
SX
BAT
REGDO
BAT
(100 mA) = [V
= 40 V, GHx = ON
= low to guarantee V = +0.5 V refresh of
= 7 V to 40 V, V
= 7 V
= -I
= -I
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
< 300 mA
= V
REG
cx
cx
boost
= 10 mA, V
= 100 mA
– V
BOOSTS
BOOST
– V
CX
D
(150 mA) – V
] < 12 V
REG
reg
, ENABLE = 0
REG
, I
BOOST
LDO increases. Observe T
reg
cx
DBOOT
= V
= 40 mA
– V
from Boost Reg
REGref
sx
= V
= +10 V
D
(50 mA)]/100 mA
J
REG
– 200 mV where V
REG
= -40°C to +150°C, V
– V
= 10 µF
CX
J
< 150 °C limit.
REG(ref)
-150
12.7
14.9
0.45
Min
100
7.0
0.8
1.5
2.5
3.0
10
35
–
–
–
–
–
–
–
–
BAT
= V
= 7 V to 16 V,
REG
Typ
0.9
1.4
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
at V
Limits
Continued next page …
BOOST
-1150
Max
16.3
0.55
180
300
220
7.0
3.0
2.0
2.3
7.5
2.0
4.0
3.3
8.0
40
30
14
40
–
= 16 V.
Units
mA
mA
mA
mA
mA
mV
mA
µA
µs
µs
ns
V
V
V
V
V
V
V