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BQ2000: Supply range

Mayur Kachhadiya
Prodigy 80 points
Part Number: BQ2000

Hallo TI,

I wanted to use BQ2000 Battery charger for charging 3 Ni-MH cells in series. In datasheet says, input supply range is between 4 ot 6V and in EVM datasheet says it requires Min 10 V (+DC).

What is specific and right range? Will it work with 5 V input supply?

Please give some feedback regarding that.

  • 0
    TI__Guru**** 166576 points
    Hi Mayur,

    The datasheet VCC pin range of 4V to 6V is correct. The EVM has an additional discrete linear regulator circuit to step down the voltage at VCC to below 6V.
  • 0 in reply to Jeff F
    Prodigy 80 points

    Hi Jeff,

    Thanks for reply.

    Would it be possible to supply directly VCC pin by 5 V as an input? If yes, what could be possbile output on pin VBAT? I need at least 3.8 V on VBAT.

    Will this IC work with this application?

    Please feeback.

  • 0 in reply to Mayur Kachhadiya
    TI__Expert 8130 points

    Hi Mayur,

    Yes, a direct supply of 5V to Vcc pin should work.

    Yes, if 3.8V is at BAT+, then the IC should be able to work. Make sure the voltage at BAT pin meets the following condition: VLBAT<VBAT<VMCV. A resistor voltage-divider between the battery pack's positive terminal and Vss scales the voltage at BAT pin. Figure 3. in the datasheet demonstrates the resistor-voltage divider network.The EVM can be configured different ways to be used with a variety of battery packs. Section 2 in the user guide describes the jumper connections on the EVM along with resulting operations.