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BQ51050B: Can it supports below 400mA charge current

Sanjay P
Prodigy 130 points
Part Number: BQ51050B

Hi,

This is Sanjay...!

My application requirement is as below

Lithium Polymer Bat

4.2V & Current < 400 mA, it may may go upto 150mA

So, My question is whether this chip supports for lower current ratings also like <400 mA?

and suggest the suitable coil for the receiver

What charger do I need to use for this to charge?

Do I need to design a charger also for this? If so, please suggest charger side as well

  • 0
    TI__Guru* 75736 points

    Hello Snjay

    I can help with the questions:

    1.) 4.2V & Current < 400 mA, it may may go upto 150mA.  So, My question is whether this chip supports for lower current ratings also like <400 mA?

    ------At lower currents the charge current accuracy is less and termination current is less.  Termination current should be set to 30mA or greater.

    2.)  suggest the suitable coil for the receiver

    ---The EVM will use IWAS-4832FF-50 from Vishay, WR-483250-15M2-G from TDK or 760308201 from Wurth

    3.) What charger do I need to use for this to charge?

    ---The device is a battery charger and wireless power receiver, no additional charger is needed.

    4.) Do I need to design a charger also for this? If so, please suggest charger side as well

    ---No additional charger is needed.

  • 0 in reply to Bill Johns
    Prodigy 130 points

    Hello Bill Johns,

    Thanks for the reply...!

    I can help with the questions:

    1.) 4.2V & Current < 400 mA, it may may go upto 150mA.  So, My question is whether this chip supports for lower current ratings also like <400 mA?

    ------At lower currents the charge current accuracy is less and termination current is less.  Termination current should be set to 30mA or greater.

    2.)  suggest the suitable coil for the receiver

    ---The EVM will use IWAS-4832FF-50 from Vishay, WR-483250-15M2-G from TDK or 760308201 from Wurth

    3.) What charger do I need to use for this to charge?

    ---The device is a battery charger and wireless power receiver, no additional charger is needed.

    I mean to say the transmitter (Not the charger)

    4.) Do I need to design a charger also for this? If so, please suggest charger side as well

    ---No additional charger is needed.

    I mean to say the transmitter (Not the charger)

    Thanks in advance

  • 0 in reply to Sanjay P
    TI__Guru* 75736 points

    Hello

    For the Transmitter side you could use an off the shelf TX such as TYLT VU Solo or one of several others on the market.  Look for a Qi certified device for best results.