Other Parts Discussed in Thread: PMP40269
If Divider2 device is attced to USB,Does this part change current limit value according to Divider number automaticaly ?
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Chuck-san
Thank you for your reply.
1.Please let us know TPS2549 behavior when Divider1 or Divider2 device is attached to USB.
2.If you have part which support Divider1 and Divider2 and Divider3,please let us know about it.
Regards,
Kura
Chuck-san
Thank you for your reply.
I'd like to confirm my understanding.
If Divider2 device attached to USB,TPS2549 enters to CDP mode and provide a current limit of 1.5A(not 2A).
So this part does not support Divider2.
Is my understanding correct ?
Chuck-san
Thank you for your reply.
Based on your advise,They change following point from above circuit.
CTL3 is connected to Vin with 10kohms.
EN pin is connected to Vin.
ILIM_HI is connected to the resister.
CS is floating.
In this situation,if divider2 device is attached to USB,does this device enter to CDP mode ?
Is current limit 1.5A automatically?
Kura-san,
I believe that the configuration that you desire is shown in the specification.
This configuration will work as follows:
First it will present Divider mode 3 at 2.4A current limit (This can be changed by updating the value of the resistor connected to ILIM_HI.
Then it will detect a BC 1.2 advertisement and present a DCP contract at 2.4A current limit (or the current limit of the ILIM_HI resistor)
If this fails, then it will present 5V at SDP current limit set by the ILIM_LO resistor.
I believe that this is the functionality that you have described in this thread.
If this fully answers your question, then please click the customer thinks resolved button or ask me any further questions that require clarification.
Regards,
Chuck
Chuck-san
I would like to get your advice for attached confuguration.
This is DCP mode,and they don't use FAULT,STATUS,CS.
ILIM_LO is open.
ILIM_HI is connected to 19.1kohms.(to set 2.8A)
(1)
In this case ,please let us know part behavior when Divider1 is attached.
(How much current can they charge Divider1 in this configuration ? )
(2)
In this case ,please let us know part behavior when Divider2 is attached.
(How much current can they charge Divider2 in this configuration? )
(3)
Should they connect ILIM _LO to resister ?
(4)
47uF x 2pcs Output capacitors are recommended in your datasheet.
Can they use 100uF 1pc capacitor as output capacitor ?