Part Number: BQ21040 On a new design, I am looking to use the BQ21040 battery charger. This is a part my company has used on a lot of designs. The attraction to it is cost and the ability to run stand-alone. The catch on this new design is that the Single…
Part Number: BQ21040 Hi
My customer test their board and find when the temperature high than 38°C, CHG pin pull high.
Disconnect the TS line of the battery, connect a fixed resistance resistor between the battery TS and GND, and simulate the ambient…
Part Number: BQ21040 Hi Sir,
BQ21040 Vin VS #CHG state
When Vin over 4.45V(4.7V~5.1V change) (Vbat=3.9V)
Why #CHG over 80ms still keep High(Vin over 4.45V )?
When VBAT=3.9V
Thanks,Ian.
Part Number: BQ21040 I was using commonly available TP4056 for charging my 1000mAh LiPo. Someone suggested me to use TI's BQ21040 as it is more trusted.
I know that Lipo battery goes from 2.8V(0% SOC) to 4.2V(100% SOC) but I noticed a strange thing…
Part Number: BQ21040 The datasheet states that if the battery voltage drops below Vrch (nominally 4.105V), then a new charge cycle is initiated even after the 10-hour timer has timed-out.
The datasheet also states if a discharged battery fails to reach…
Part Number: BQ21040 I am currently trying to build a single cell LIPO battery charger with your chip (BQ21040), however when I try to charge a 400mah 3.7V LIPO battery with it,The chip seems to discharge the battery not charge it. I have the Riset set…
Hello
"I use a battery with a 18650 lithium battery and no temperature sensing pins. Is it appropriate to use the BQ21040 as a charger?" -- Bill J -- Yes, but note that this device has a small package and at higher charge currents the thermal rise…
Part Number: BQ21040 Other Parts Discussed in Thread: BQ25171-Q1 , BQ25170 Hello,
I've a custom board with BQ21040 charger and I'm looking for to charge a Lipo battery with the following parameters:
1. Voltage: 3.7V
2. Capacity: 60mAh
3. Shape…
Part Number: BQ21040 Hi
I am designing kind of a ZigBee button that would be powered by single coin cell. For battery level monitoring I want to use MCU internal temperature and battery monitor functions. But also I will be charging the battery by BQ21040…
Part Number: BQ21040 Hi team,
Just to confirm, when the battery is absent, the charger shall also regulate the output voltage to 4.2V right? And it should also OK to power loads?
Thanks!
