Charging indication circuit

elec32156

Charging indication circuit [Copy link]

Please ask the experts, is there any way to make the charging LED light flash? In the off state (MCU is not working), only the 5V voltage from the charger is given to the motherboard and the charging chip. The current charging chip only supports the indicator light to be always on and turn off after full (pull low after inserting the charger, the light is on, pull high after full, the light is off). Is there any auxiliary circuit or chip that can make it flash? The flashing frequency is 1hz, thank you!

chunyang

If you just want to flash, it's simple, just use a flashing LED. Flashing LED is an integrated device with a flashing control circuit. The flashing frequency is controlled by the internal circuit, and it can also be controlled by voltage.

gxg1122

chunyang posted on 2018-1-4 13:02 If you just want to flash, it's simple, just use a flashing LED. Flashing LED is an integrated device with a flashing control circuit, and the flashing frequency...

I've learned it. Does the flashing of power banks also work like this?

chunyang

gxg1122 posted on 2018-1-4 13:05 I have learned it. Is the flashing of power bank also like this?

Generally not, but it is realized by the main control MCU driving the conventional LED.

elec32156

chunyang posted on 2018-1-4 13:02 If you just want to flash, it's simple, just use a flashing LED. Flashing LED is an integrated device with integrated flashing control circuit, the flashing frequency...

I don't know if the package specifications meet the requirements, and there are also cost considerations. Please tell me, is there any way to achieve it through an external circuit, such as a triode or something, the frequency of 1~2hz is fine, this board is relatively small, the structure space is limited, and they are all chip-type resistors and capacitors.

qwqwqw2088

aw3215a is an integrated charging IC. The flashing light should be the effect of IC integration. If the circuit has other functions and is controlled by a single-chip microcomputer MCU, it is not a problem to implement it. It is unnecessary and difficult to add a flashing light to the IC accessory charging. However, you can communicate with Shanghai Awin Technology.

chunyang

elec32156 posted on 2018-1-4 16:05 I don't know if the package specifications meet the requirements. In addition, there are cost considerations. I would like to ask if there is any way to achieve it through external circuits, such as triodes...

External circuits can be used, such as using two transistors to form an astable circuit, but the size and cost may not be suitable, and such solutions are generally not used. What solution is suitable? First figure out your application requirements.

elec32156

qwqwqw2088 posted on 2018-1-4 17:14 aw3215a is an integrated charging IC. The flashing of the light should be the effect of the IC integration. For example, the circuit has other functions controlled by a microcontroller MCU, etc. ...

Well, I asked and found that 3215 cannot achieve flashing when charging. The STA pin is always low.

elec32156

chunyang posted on 2018-1-4 17:31 External circuits are possible, such as using two transistors to build an astable circuit, but the size and cost may not be suitable, and such a solution is generally not used. What...

I found a flashing circuit on the Internet, which requires two triodes to control. Thank you. I will communicate with the customer later and ask them to cancel this requirement.