• State TI Thinks Resolved
  • +1 person also asked this people also asked this
  • Locked Locked
  • Replies 5 replies
  • Answers 1 answer
  • Subscribers 65 subscribers
  • Views 201 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

BQ2004H: BQ2004H

Vlad Mishkin
Prodigy 10 points
Part Number: BQ2004H

Configuration of the charger's pins

Pin name   Pin number   Configuration

DSEL         2                    Gnd

VSEL          3                    Float

TM1            4                    Gnd

TM2            5                     +5V - Vcc

Problem: Quick charge time is ~3 minutes. It should be ~154 minutes (Datasheet). Previous battery state doesn't affect to this.

  • 0
    TI__Mastermind 37105 points

    Hello,

    Can you please provide more information? What is the battery voltage at the start of the charge cycle? How was it observed that the charge had finished? Can you send a schematic?

    Thanks,

    Mike Emanuel

  • 0 in reply to Michael Emanuel35
    Prodigy 10 points

    Hello,

    Charge cycle was started with different voltages: ~2.1 (full discharge); ~2.4;  ~2.55. All times result was same. Charge cycle and indication on LEDx pins were such as described in datasheet excluding quick charge time. The VSEL pin is connected to VCC on schematic but after some tests it was reconnect to Gnd  ("both PVD and -∆V are disabled"). It didn't affect too.Charge cycle was monitored by LEDx pins, current consumption and oscillogram on the drain of the Q1. All these measurements corresponded datasheet. The schematic is attached.6036.Charger.pdf

    Thanks,

    Vlad Mishkin

  • 0 in reply to Vlad Mishkin
    TI__Mastermind 37105 points

    Dear Vlad,

    Can you please report the status of the LEDx pins when this is happening?

    Thanks,

    Mike Emanuel

  • 0 in reply to Michael Emanuel35
    Prodigy 10 points

    Hello Mike,

    State of the LEDx pins corresponds data from datasheet. This is marked in attached file.

    For Hold-Off and finish mode the charge current is ~120mA. For Fast-Charge mode it's ~1A.

    These data were measured when start voltage for two cells was ~2.35V and Fast-Charge finished when it was ~2.55V.

  • 0 in reply to Vlad Mishkin
    TI__Mastermind 37105 points

    Dear Vlad,

    What is the size of your battery? It may be charging faster because it is a smaller battery. Is the charge current and charge voltage meeting your expectations? 

    Thanks,

    Mike Emanuel

    Please click "Resolved" if this answered your question.