I'm having a similar problem with the bq2004h chip.
built a prototype using bq2004 chip. worked good. built 10 production boards using the bq2004H chip, and none of them will go into fast charge mode.
led blinks "fast charge pending", then goes solid…
Other Parts Discussed in Thread: BQ2004H , BQ2004 I have a BQ2004H chip and it seems to not be exiting the Hold-off period after entering fast charge mode.
Upon startup, the following steps happen:
1) LED1 stays low and LED2 pulses 1/8s high, 1/8s low…
Other Parts Discussed in Thread: BQ2004H From the datasheet I see that the charging rate for the BQ2004H is set according to pins TM1 and TM2. Can the rate be changed while the chip is running, or does it have to be powered down, the settings changed,…
Part Number: BQ2004 I designed a battery charger with BQ2004E for 4 cells Nimh battery(10000mah). I found the charger will always stop fast-charge before it's completely charged and the time seems shifts in the table in datasheet. For example, I set TM1…
7.7 V NI-MH Battery (6 AA Battery in series)
The BQ2004H can be used for high cell counts like this. It is only a controller that runs on a low 5V bias.
4336.PMP2295_REVA.pdf
When the input is removed, the charger still has the battery resistor divider…