BQ25606: BQ25606

Harry cheng

Part Number: BQ25606

Nice to meet you. We create BQ25606 charge IC schematic. See attachment. We would like to have battery charging mode and Boost mode in our design.

We have one question. If we do not use MCU to control OTG pin, Can you suggest a design to control OTG? And then BQ25606 can automatically change between boost mode (no USB adaptor plugin) and buck mode(USB adaptor is pluging).If OTG pin pull high anytime and USB is no plugin, it is in boost mode(VBUS = 5.15v).

Thanks in advance.Power_v1_3.pdf

over 4 years ago

0 Ning T over 4 years ago

TI__Mastermind 46591 points

Hi,

Please visit https://e2e.ti.com/support/power-management/f/196/t/890626 for BQ25606: Schematic Review and PCB Layout Design Tips. Additional Information including FAQs is available http://www.ti.com/lit/an/slva924/slva924.pdf Designing A Standalone Single Cell 3-A Charger with the bq25606.

Referring to 8.3.3 Boost Mode Operation From Battery on the d/s, if the OTG pin is pulled high all the time, the boost operation can be enabled automatically if the conditions are valid:

1. BAT above VOTG_BAT

2. VBUS less than BAT+VSLEEP (in sleep mode)

3. Voltage at TS (thermistor) pin as a percentage of VREGN is within acceptable range (VBHOT < VTS < VBCOLD)

4. After 30-ms delay from boost mode enable

Thanks,

Ning.

0 Harry cheng over 4 years ago in reply to Ning T

Prodigy 20 points

Do you have any suggestion to design a schematic to control OTG pin in ordering that BQ25606 IC can automatically switch to boost mode (no USB adpator plugin) and buck mode( USB adpator plugin)?

0 Ning T over 4 years ago in reply to Harry cheng

TI__Mastermind 46591 points

Hi,

If the OTG pin is pulled high, the device may automatically enter buck or boost mode when the corresponding conditions are met.

Thanks,

Ning.

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BQ25606: BQ25606