A3938SEQ Allegro Microsystems Inc, A3938SEQ Datasheet - Page 5

• Manufacturer Part Number: A3938SEQ
• Description: IC CTRLR MOSFET 3PH 32-PLCC
• Manufacturer: Allegro Microsystems Inc

Specifications of A3938SEQ

• Applications: DC Motor Controller, Brushless (BLDC), 3 Phase
• Number Of Outputs: 1
• Voltage - Supply: 18 V ~ 50 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output: -
• Voltage - Load: -

A3938
1
individual units, within the specifi ed maximum and minimum limits.
2
ELECTRICAL CHARACTERISTICS
C
Typical data are for initial design estimations only, and assume optimum manufacturing and application conditions. Performance may vary for
Negative current is defi ned as conventional current coming out of (sourced from) the specifi ed device terminal.
Bootstrap Capacitor
Bootstrap Capacitor Voltage
Bootstrap R
Charge Current (Source)
Input Offset Voltage
Input Current , Sense pin
Input Current , Reference pin
Blank Time
RC Charge Current
RC Voltage Threshold
Protection Circuitry
Bootstrap Charge Threshold
Short to Ground, Drain-Source Monitor
VREG Undervoltage Threshold
Fault Output Voltage
Brake Capacitor Supply Current
Low Side Gate Voltage
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
Current Limit Circuitry
BOOT
= 0.1 μF, C
OUT
Characteristics
VREG
= 10 μF, PWM = 22.5 kHz, square wave, two phases active
Symbol
UVLO
I
V
t
V
1,2
V
V
BLANK
V
BRAKE
V
R
ΔT
V
I
I
I
GLBH
T
I
I
CX
RC
RCL
RCH
OUT
cx
CX
dsh
CX
IO
B
B
J
J
(continued) Unless otherwise noted: T
Three-Phase Power MOSFET Controller
I
I
0 V < V
0 V < V
0 V < V
R = 56 kΩ, C = 470 pF
GHx turns on, and GLx turns off, at I
V
V
V
I
V
V
cx
cx
OL
BB
REG
REG
BB
BB
= 0, V
= –50 mA
= 1 mA
=0, BRKCAP = 8V
– V
= 8 V, BRKSEL = 1
increasing
decreasing
SX
cmr
cm
cm
sx
, high side on
, V
, V
< 1.5 V
= 0, V
diff
diff
< 1.5 V
< 1.5 V
Test Conditions
reg
= 13 V
cx
A
= 25°C, V
Min.
10.4
–0.9
100
1.0
2.7
1.3
9.2
8.6
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
–
–
–
–
–
–
–
–
–
–
–
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
BB
= 18 V to 50 V, C
Typ.
–9
11.6
0.91
–25
165
1.1
3.0
2.0
9.7
9.1
6.6
–1
30
10
9
–
–
0
–
1
Max.
12.8
–1.1
10.2
± 5
1.2
3.3
2.7
9.6
0.5
12
–
–
–
–
–
–
–
–
–
LCAP
= 0.1 μF,
Units
mA
mV
mA
mA
μA
μA
μA
°C
°C
μs
Ω
V
V
V
V
V
V
V
V
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