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!
Part Number: BQ21040 Hi,
We are using the BQ21040 with a Lithium Polymer cell that has a protection circuit already installed. I am currently testing performance at low voltage situations. Battery and charging circuit is connected to a constant 20mA load…
Part Number: BQ21040 Dear Team,
I am trying to build a GPS device with battery backup for cars
My charger IC BQ21040, powered via LDO TL751M (input 12v and output 5v) .Battery size 150mah.
Every thing works fine but the LDO is getting heated up to 50…
Part Number: TPS22959 Other Parts Discussed in Thread: BQ21040 Can the TPS22959 load switch be used for Disconnecting the Load While Charging a single lithium ion battery using bq21040.
in another question I was advised to use the CHG/ pin on the bq21040…
Part Number: BQ21040 Hi!
The electrical parameters section of the BQ21040 datasheet indicates I can program this part down to a charge current of 10mA (page 5 of the datasheet [SLUSCE2D]). In the Iset section there is a statement that indicates the lowest…
Part Number: BQ21040 Dear Sir/Ms.
I don't found Vout drop voltage when Iout=10~50mA in datasheet. I only found Max. Drop voltage 550mV when Iout=0.5A. May I have this parameter?
My customer application is
If the V voltage is entered in the 4.35 (V…
Part Number: BQ21040 Hi Sir,
Do we have bq21040 charging current distribute fig.?
Customer would like to know charging current distribute fig. under specific condition.
Due to spec. shows 10% is too rush, it only difference 10~15mA in customer production…
Part Number: BQ21040 Hi
For the abnormal charging current describe as below: 1. VBUS = 5V, VBAT = 3.13V, charging current 615mA, the charging current in the constant current stage has not reached the design value 800mA. 2. VBUS = 5V, VBAT = 4V, the charging…
Part Number: BQ21040 Hi,
We are developing system with BQ21040DBVR charging circuit to recharge VL-3032 Panasonic Lithium Vanadium Pentoxide battery. so, the query is can we charge VL-3032 battery with BQ21040DBVR recharging circuit. kindly, do the needful…