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A3940KLP 参数 Datasheet PDF下载

A3940KLP图片预览
型号: A3940KLP
PDF下载: 下载PDF文件 查看货源
内容描述: 全桥式功率MOSFET控制器 [FULL-BRIDGE POWER MOSFET CONTROLLER]
分类和应用: 控制器
文件页数/大小: 12 页 / 633 K
品牌: ALLEGRO [ ALLEGRO MICROSYSTEMS ]
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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
0
0
0
0
X
0
1
0
1
X
1
1
0
0
1
0
1
0
1
0
1
1
0
0
0
1
0
0
0
1
0
0
0
0
Lo  
Hi  
Lo  
Z
Hi  
Lo  
Lo  
Z
Reverse  
Fast decay, SR enabled  
Slow decay, braking mode  
Fast decay, coast  
Lo  
Z
Slow decay, SR disabled  
1
1
1
1
1
1
0
0
0
0
X
0
1
0
1
X
1
1
0
0
0
1
1
0
0
1
0
1
0
1
1
0
0
0
0
0
1
0
0
0
Hi  
Lo  
Lo  
Z
Lo  
Hi  
Lo  
Z
Forward  
Fast decay, SR enabled  
Slow decay, braking mode  
Fast decay, coast  
Z
Lo  
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  
RESET FAULT CP Reg.  
VREG13  
VREG5  
GHx  
GLx  
No Fault  
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
ON  
ON  
ON  
ON  
ON  
ON  
OFF  
OFF  
ON  
ON  
ON  
ON  
ON&  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
ON&  
ON&  
0
0
0
0'  
0
0
0
0
0'  
0
Short-to-Battery"#  
Short-to-Ground"$  
Open Bridge (VDRAIN)"%  
VREG13 Undervoltage  
VBB Overvoltage  
VBB Undervoltage  
Thermal Shutdown  
OFF  
OFF  
0'  
0'  
0'  
0'  
Sleep  
0
1
OFF  
OFF  
OFF  
Z
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 VREG13 < 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