參數(shù)資料
型號: A3938SLD-T
廠商: Allegro MicroSystems, Inc.
英文描述: Three-Phase Power MOSFET Controller
中文描述: 三相功率MOSFET控制器
文件頁數(shù): 4/11頁
文件大?。?/td> 399K
代理商: A3938SLD-T
4
Worcester, Massachusetts 01615-0036 (508) 853-5000
115 Northeast Cutoff, Box 15036
www.allegromicro.com
D
2
A3938
Three-Phase Power MOSFET Controller
Characteristics
Symbol
Test Conditions
Min.
Typ.
1
Max.
Units
Bootstrap Capacitor
Bootstrap Capacitor Voltage
V
CX
I
cx
= 0, V
sx
= 0, V
reg
= 13 V
10.4
11.6
12.8
V
Bootstrap R
OUT
R
CX
I
cx
= –50 mA
9
12
Charge Current (Source)
I
CX
100
mA
Current Limit Circuitry
Input Offset Voltage
V
IO
0 V < V
cmr
< 1.5 V
± 5
mV
Input Current , Sense pin
I
B
0 V < V
cm
, V
diff
< 1.5 V
–25
μA
Input Current , Reference pin
I
B
0 V < V
cm
, V
diff
< 1.5 V
0
μA
Blank Time
t
BLANK
R = 56 k
, C = 470 pF
0.91
μs
RC Charge Current
I
RC
–0.9
–1
–1.1
mA
RC Voltage Threshold
V
RCL
1.0
1.1
1.2
V
V
RCH
2.7
3.0
3.3
V
Protection Circuitry
Bootstrap Charge Threshold
I
cx
GHx turns on, and GLx turns off, at I
cx
–9
mA
Short to Ground, Drain-Source Monitor
V
dsh
V
BB
– V
SX
, high side on
1.3
2.0
2.7
V
VREG Undervoltage Threshold
UVLO
V
REG
increasing
9.2
9.7
10.2
V
V
REG
decreasing
8.6
9.1
9.6
V
Fault Output Voltage
V
OUT
I
OL
= 1 mA
0.5
V
Brake Capacitor Supply Current
I
BRAKE
V
BB
= 8 V, BRKSEL = 1
30
μA
Low Side Gate Voltage
V
GLBH
V
BB
=0, BRKCAP = 8V
6.6
V
Thermal Shutdown Temperature
T
J
165
°C
Thermal Shutdown Hysteresis
T
J
10
°C
ELECTRICAL CHARACTERISTICS
1,2
(continued)
Unless otherwise noted: T
A
= 25°C, V
BB
= 18 V to 50 V, C
LCAP
= 0.1 μF,
C
BOOT
= 0.1 μF, C
VREG
= 10 μF, PWM = 22.5 kHz, square wave, two phases active
1
Typical data are for initial design estimations only, and assume optimum manufacturing and application conditions. Performance may vary for
individual units, within the speci
fi
ed maximum and minimum limits.
2
Negative current is de
fi
ned as conventional current coming out of (sourced from) the speci
fi
ed device terminal.
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