Other Parts Discussed in Thread: DRV8872
MPN: DRV8872DDARQ1
failure rate: 1.4%
. Board level failure mode板级的失效模式：
Failure mode 1: When MCU setting logic inputs signal IN1=1 and IN2=0, the motor can’t driver forward running, and output port OUT1 is low level respect to GND, but to drive reverse running is ok.
Failure mode 2: When MCU setting logic inputs signal IN1=0 and IN2=1, the motor can’t driver reverse running, and output port OUT2 is low level respect to GND. but to drive forward running is ok.
Failure mode 3: driving motor to forward or reverse is failed while setting logic input signal IN1=1 and IN2=0 or IN1=0 and IN2=1.
- Customer testing methods/conditions (applied V/I, temperature, etc.)
(Please specify at which step the units failed and the corresponding testing conditions)
客户测试条件或方法（请指出失效是发生在测试的哪一步骤，以及当时的测试条件）：
Set DC input voltage to DC27V, OUT1 and OUT2 of DRV8872 are connected to DC 24V Motor during testing. Then to toggle the forward and reverse signal separately, the MCU’s two I/O ports will set related logic inputs signal level to IN1 and IN2 of DRV8872 within15sec for DC motor forward and reverse. However the DC motor can’t normal operated.
- Customer diagnosis procedure(including swap test) 客户诊断的过程(包括交叉验证)：
- Check input signal and output voltage, For some defective products, while Pin3_IN1 / Pin2_IN2 input signal IN1=0 / IN2=1, but Pin6_OUT1 is not Low / Pin8_OUT2 is not high; For some defective products, while Pin3_IN1 / Pin2_IN2 input signal IN1=1 / IN2=0, but Pin6_OUT1 is not high / Pin8_OUT2 is not high;
- After replacing DRV8872, the product work normal.
- TI device level failure mode芯片级别的失效模式
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Please specify:
- which function cannot meet TI datasheet or which pins have the abnormal behavior
- Customer testing limits
- Customer measured value (failed vs. good), if waveform is appreciated.
请定位出哪个功能/参数/引脚不符合TI规格书，提供相应的客户测试规范和好坏样品的测试数值（波形）对比
Pin6_OUT1 / Pin8_OUT2 output does not meet datasheet chapter 7.3.1 Bridge control.
TI device level failure mode芯片级别的失效模式
Please specify:
- which function cannot meet TI datasheet or which pins have the abnormal behavior
- Customer testing limits
- Customer measured value (failed vs. good), if waveform is appreciated.
请定位出哪个功能/参数/引脚不符合TI规格书，提供相应的客户测试规范和好坏样品的测试数值（波形）对比
Pin6_OUT1 / Pin8_OUT2 output does not meet datasheet chapter 7.3.1 Bridge control.
-
- Schematics 客户的电路原理图：
- TI device level failure mode芯片级别的失效模式
Please specify:
- which function cannot meet TI datasheet or which pins have the abnormal behavior
- Customer testing limits
- Customer measured value (failed vs. good), if waveform is appreciated.
请定位出哪个功能/参数/引脚不符合TI规格书，提供相应的客户测试规范和好坏样品的测试数值（波形）对比
Pin6_OUT1 / Pin8_OUT2 output does not meet datasheet chapter 7.3.1 Bridge control.
- Failure history review 失效历史回顾：
For this failure mode, please provide the failure rate(failed qty/production qty) of this device in recent six months on customer’s production line请提供近6个月客户生产线同一问题的失效率（失效数量/生产总数量）
Recently we have produced total 34,000pcswe and no find this kind of issues, but for this batch total 3888pcs, we found the defective, and the failure rate to up to 1.4%
- Schematics 客户的电路原理图：
