I have updated the P/N to BQ2057W in title.
Have you been able to compare the pin to ground resistance of a good and bad unit?
On layout the copper under Q1 looks small vs the heat that it can generate. Are you seeing any thermal issues on Q1?
Part Number: BQ2057W Q:
Is the output signal at pin 7 name: CC (Charge control output)-
a PWM signal ? to regulate the magnitude of the battery charge current -
if so: what is the timing of this signal?
thx
Part Number: BQ2057W Question about circuit operation using BQ2057W
I am using the following circuit, and 9.0V is applied to J1 with a regulated power supply. A battery (7.4V/1000mAh) is connected to J3. The voltage of each PIN of the BQ2057W during charging…
Part Number: BQ2057W Question about D1 position of BQ2057W. The figure on the left is the standard circuit of the data sheet. Is it okay to set D1 at the position shown on the right? The figure on the left shows the actual circuit used in the 2-series battery…
Part Number: BQ2057W Hi
The customer design with BQ2057W. It can charge normal at 1.2A, but after the battery is hot-plug, the chip cannot be charged automatically.
It is need to power on each time to start charging. Turn off the power again, plug in…
Part Number: BQ2057W Hi,
We have designed a charging module using BQ2057WSN IC to charge a 8.4V, 2400mAH 2S 18650 Li-ion battery. My supply power is 9V 5W SMPS. I have set my charging current to mA. The battery is charging continuosly and does not cutoff…
Part Number: BQ2057W Good morning,
I'm asking your help because I'm having problem with BQ2057WSN mounted on a PCB in order to charge a 2S1P Li-Ion battery, here the link with all technical information:
The power supply that I'm using to recharge…
Part Number: BQ2057W Hi,
I would like to ask you about the BQ2057W device. For the flowchart in Fig. 2 of the data sheet, is "Yes" indicated by the red circle in the attached figure correct "No"?
Best regards,
Part Number: BQ2057W Hi,
I would like to ask you a question about the BQ2057WTS device.
(Question 1) In the figure below, should the minimum VCC voltage when VBAT is 8.4V be as follows? The diode (D1) is not considered. VCC = VBAT-VDS (Q1) - (RSNS * ISNS…
Part Number: BQ2057W Good morning everybody,
I'm using the BQ2057WSN in a project in order to recharge a 2S1P battery pack. The power supply that I use to recharge the battery as 12V output, with 4.5A max.
The design of the BQ2057 is implemented in…