参数资料
型号: A3938SLQTR
厂商: Allegro Microsystems Inc
文件页数: 5/11页
文件大小: 0K
描述: IC CTRLR MOSFET 3PH 36-QSOP
标准包装: 1,500
应用: DC 电机控制器,无刷(BLDC),3 相
输出数: 1
电源电压: 18 V ~ 50 V
工作温度: -20°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 36-QSOP
供应商设备封装: 36-QSOP
包装: 带卷 (TR)
A3938
Three-Phase Power MOSFET Controller
ELECTRICAL CHARACTERISTICS 1,2 (continued) Unless otherwise noted: T A = 25°C, V BB = 18 V to 50 V, C LCAP = 0.1 μ F,
C BOOT = 0.1 μ F, C VREG = 10 μ F, PWM = 22.5 kHz, square wave, two phases active
Characteristics
Symbol
Test Conditions
Min.
Typ. 1
Max.
Units
Bootstrap Capacitor
Bootstrap Capacitor Voltage
Bootstrap R OUT
Charge Current (Source)
V CX
R CX
I CX
I cx = 0, V sx = 0, V reg = 13 V
I cx = –50 mA
10.4
100
11.6
9
12.8
12
V
Ω
mA
Current Limit Circuitry
Input Offset Voltage
Input Current , Sense pin
Input Current , Reference pin
Blank Time
RC Charge Current
RC Voltage Threshold
V IO
I B
I B
t BLANK
I RC
V RCL
V RCH
0 V < V cmr < 1.5 V
0 V < V cm , V diff < 1.5 V
0 V < V cm , V diff < 1.5 V
R = 56 k Ω , C = 470 pF
–0.9
1.0
2.7
–25
0
0.91
–1
1.1
3.0
±5
–1.1
1.2
3.3
mV
μ A
μ A
μ s
mA
V
V
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
I cx
V dsh
UVLO
V OUT
I BRAKE
V GLBH
T J
Δ T J
GHx turns on, and GLx turns off, at I cx
V BB – V SX , high side on
V REG increasing
V REG decreasing
I OL = 1 mA
V BB = 8 V, BRKSEL = 1
V BB =0, BRKCAP = 8V
1.3
9.2
8.6
–9
2.0
9.7
9.1
30
6.6
165
10
2.7
10.2
9.6
0.5
mA
V
V
V
V
μ A
V
°C
°C
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 ? ed maximum and minimum limits.
2
Negative current is de ? ned as conventional current coming out of (sourced from) the speci ? ed device terminal.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
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