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参数资料
| 型号： | A3940KLWTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 11/13页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR MOSFET FULL 28-SOIC |
| 标准包装： | 1,000 |
| 配置： | 半桥 |
| 输入类型： | 非反相 |
| 延迟时间： | 225ns |
| 电流 - 峰： | 700mA |
| 配置数： | 1 |
| 输出数： | 4 |
| 电源电压： | 7 V ~ 40 V |
| 工作温度： | -40°C ~ 135°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC W |
| 包装： | 带卷 (TR) |
3940
FULL-BRIDGE POWER
MOSFET CONTROLLER
Functional Description (cont’d)
Control Logic
PHASE ENABLE MODE
SR
GLA
GLB
GHA
GHB
SA
SB
Mode of Operation
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
1
0
0
0
0
X
0
1
0
1
X
0
1
0
1
X
1
1
0
0
X
1
1
0
0
1
0
1
0
1
0
1
1
0
0
0
1
1
0
0
1
0
1
0
1
0
1
0
0
0
1
0
0
0
0
1
0
0
0
0
0
1
0
0
0
Lo
Hi
Lo
Z
Lo
Hi
Lo
Lo
Z
Z
Hi
Lo
Lo
Z
Z
Lo
Hi
Lo
Z
Lo
Reverse
Fast decay, SR enabled
Slow decay, braking mode
Fast decay, coast
Slow decay, SR disabled
Forward
Fast decay, SR enabled
Slow decay, braking mode
Fast decay, coast
Slow decay, SR disabled
NOTES: All faults will coast the motor, i.e., GHA = GHB = GLA = GLB = 0 to switch off all bridge MOSFETs.
X = Indicates a “don’t care”.
Z = Indicates a high-impedance state.
Fault Responses
Fault Mode
No Fault
Short-to-Battery "#
Short-to-Ground "$
Open Bridge (V DRAIN ) "%
V REG13 Undervoltage
V BB Overvoltage
V BB Undervoltage
Thermal Shutdown
Sleep
RESET
1
1
1
1
1
1
1
1
0
FAULT
0
1
1
1
1
1
1
1
1
CP Reg.
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
VREG13
ON
ON
ON
ON
ON &
ON
OFF
OFF
OFF
VREG5
ON
ON
ON
ON
ON
ON
ON &
ON &
OFF
GHx
–
0
0
0
0 '
0
0 '
0 '
Z
GLx
–
0
0
0
0 '
0
0 '
0 '
Z
NOTES: " = These faults are latched but will clear during RESET = 0 pulse. GHx = GLx = 0 during RESET = 0, except see ' .
Other faults will not clear except when their cause is removed.
# = Short-to-battery can only be detected when the corresponding GLx = 1.
$ = Short-to-ground can only be detected when the corresponding GHx = 1.
% = Bridge fault appears as a short-to-ground fault on all motor phases.
& = Not instructed off but may be low voltage because of the fault indicated.
' = During undervoltage conditions, the low sides of GHx and GLx are instructed to be “on” so that the outputs are
low = 0; however, with V REG13 < 4 V, the outputs will start to open (become high impedance). See “Sleep Mode”.
115 Northeast Cutoff, Box 15036
10
Worcester, Massachusetts 01615-0036 (508) 853-5000
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