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| 型号： | PCZ33937AEKR2 |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 运动控制电子 |
| 英文描述： | AC MOTOR CONTROLLER, 0.8 A, PDSO54 |
| 封装： | 0.65 MM PITCH, ROHS COMPLIANT, SOIC-54 |
| 文件页数： | 33/47页 |
| 文件大小： | 750K |
| 代理商： | PCZ33937AEKR2 |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
39
33937
FUNCTIONAL DEVICE OPERATION
PROTECTION AND DIAGNOSIS FEATURES
PROTECTION AND DIAGNOSIS FEATURES
Table 18. 33937 Fault Protection
No.
Fault
Cause
Detection
33937 Protective Action
1
Phase Output
Shorted to VSUP
(High Side FET
Shorted)
Wire harness shorted to
battery
Drain-to-Source short on the
High Side FET
Directly sensed by ADC as voltage
across RSENSE
Over-current Comparator output
OC_OUT monitoring (Over-current
Error)
Low Side Phase Error
Direct PHASEx output monitoring
All external FETs turned off
Fault bit set in Status Register
INT pin set high
OC_OUT pin set high
2
Phase Output
Shorted to
Ground (RSENSE
Bypassed)
Wire harness shorted to
battery
Desaturation Error
High Side Phase Error
Direct PHASEx output monitoring
All external FETs turned off
Fault bit set in Status Register
INT pin set high
3
Low Side FET
Shorted
Drain-to-Source short on the
Low Side FET
Directly sensed by the ADC as
voltage across RSENSE
Over-current Comparator output
OC_OUT high (Over-current error)
Desaturation Error
High Side Phase Error
Direct PHASEx output monitoring
All external FETs turned off
Fault bit set in Status Register
INT pin set high
OC_OUT pin set high
4
High Side FET
Opened
Module board assembly
issue
Desaturation Error
High Side Phase Error
All external FETs turned off
Fault bit set in Status Register
INT pin set high
5
Low Side FET
Opened
Module board assembly
issue
Directly sensed by ADC as voltage
across RSENSE
Low Side Phase Error
All external FETs turned off
Fault bit set in Status Register
INT pin set high
6
Phase Output
Opened (No
Load)
Wire harness open
Directly sensed by ADC as voltage
across RSENSE
NOTE: Other protective actions should be taken at the system level by the controlling microcontroller or DSP. It is possible to disable all
automatic shutdowns except for VLS undervoltage. Even when masked, faults will be registered by the status registers.
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