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TPS65218D0: TPS65218D0 off-state problem |
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Part Number: TPS65218D0 Hello, my customer is using PMIC TPS65218 in their application and it was running well. He switched to the new TPS65218D0 now and got into a problem which stopped the production! The problem is that in a specific configuration when the application is switched off still a parasitic current occurs on the BIAS and DCDC input terminals of the PMIC (see attachment). Now the D0 PMIC is going into the OFF state after a period of 1-20s and states there, no chance leave this state. Only the push button or a reset helps. The non-D0 version wasn |
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Holger, Sorry, but what am I looking at in this scope shot? What pin are you probing and when are you probing it? I don |
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Holger, To answer your questions: HS WG-FAE - Is there a difference in the D0 and non-D0 version which leads to this problem? No, feel free to review the TPS65218 (-B1) to TPS65218D0 changes, attached here and also in our FAQ section. 2577.TPS65218xx_Rev_history.pdf HS WG-FAE Is this possible withouth a Coil Cell Supply or is the bit reseted in the off-state. If there is no voltage present on the CC pin, it will reset to 0b automatically after you set to 1b. However, a physical coin cell is not required. You can also use a resistor divider to generate 3V nominal at the CC pin from the main input voltage. 3V = 5V*R2/(R1 + R2) --> R2 = 100k, R1 = 67k |
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