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TPS22916: is it TPS22916 must meet I (RCB) that can start working？

Cris Qi
Intellectual 835 points
Part Number: TPS22916
Other Parts Discussed in Thread: TPS2120, TPS2121, TPS2115A, TPS22912C, TPS22910A

Hi，

Consult TPS22196 device, use TPS22916 string in the battery all the way, EN has been in the state of ON, the LDO below artificially control it power, in the control of LDO power, now can not normally block the power supply of the battery, is it TPS22916 must meet I (RCB) that can start working? If so, do you have a lower current recommmend IC?

  • 0
    TI__Genius 10855 points

    Hi Cris, 

    Thanks for reaching out on E2E!

    To reiterate your configuration, you have the TPS22916 connected in the above circuit, in a power mux configuration, with it blocking reverse current whenever the 3.6V LDO is enabled. Is my understanding correct?

    The TPS22916 can be used in a configuration like this, however it might be easier to use an integrated power mux device, such as the TPS2121, TPS2120 or the TPS2115A. These devices can integrate the diode and load switch into a single device. 

    To answer your question on the TPS22916, the RCB activation circuitry will block reverse current from VOUT to VIN when the current reaches -500mA. Once the voltage on the output drops back down to within 25mV of VIN, the RCB will be deactivated. 

    You could also look at the TPS22912C or the TPS22910A for other devices with RCB functionality.

    Thanks,

    Arthur Huang