Model:090646 SKU:090646 Questions

[paul jozef October 24, 2020 at 7:21 pm Post count: 0]

#50680 Reply |

I wish to use your Power Converter DC 3~35V to 3~35V 6A Adjustable Voltage Regulator.

I am wishing to build an emergency (only) power blocksfor cell phones.

I am not referring to 10,000 – 20,000mAh everyday use power blocks.

They would only be used for a catastrophic disaster happening.

Hopefully the emergency power block would at best provide a single charge to a phone, because it would totally drain the batteries.

It would use L91 AA Lithium-ion batteries, with a shelf life of 15 years.

• Voltage: 1.5V (1.72V initial peak)
• Capacity: 3000mAh Ultra High Capacity
• Current: 0.5000A

• Max Discharge Current: 2.0A continuous, 3.0A pulse (2sec on / 8 sec off)

• 4.5 watt-hours

The batteries can be purchased everywhere, even in a total blackout.

My design is to make [2] series wired battery packs, then wire them in parallel to boost capacity to 6000mAh (6A). Phones require at least 5V and 1Amp to charge. At this rate the voltage should drop to around 1.4vdc, and all 3000mAh would be used.

Would you please advise nominal voltage to use – 4.5vdc or 6.0vdc. Which would work better with your power converter/regulator?

Your description states, “Identify resistance: Tablet PC, ipad, iphone (some phones identify circuit is different, need to be adjusted)”.

Our phones are:

Samsung Galaxy S7 Battery – 3.85 V, 3,000mAh

Moto G7 Battery – 3.85 V, 3,000mAh

Both phones support 15-watt USB-C fast charging: Output Current: 5V 2.1A (2100mAh)

Will your power converter/regulator allow our phones to accept/recognize power from the battery pack?

[DrokKeymaster October 26, 2020 at 10:05 am Post count: 2971]

#50845 Reply |

Hello paul jozef，

This item doesn’t support USB 3.0 fast charging protocol.

And please kindly notice USB output voltage is not  fixed 5v. It is the same as that on screw terminal. So you need to confirm output voltage before connecting USB device.

Best regards.

• This reply was modified 3 years, 6 months ago by  Drok.

[paul jozef October 26, 2020 at 11:10 pm Post count: 0]

#50894 Reply |

Thank you for the prompt response.

Fast charge is good to know.

I understand you have to manually set the output voltage  to 5vdc. My question was about the input voltage choice of 4.5vdc or 6vdc. If I use 4.5, even as the batteries discharge (1.2 volts each) the voltage is always being boosted. If I use 6.0, the voltage is being reduced. What happens if the voltage drop below 5.0? Does it automatically switch to boost mode?

Regarding your statement: The unit can identify phone (you mention iphones) resistance, but may need to be adjusted for other phone manufacturer. Our phones are Android –  Samsung Galaxy S7 & Motorola Moto G7. Will the unit work with these? If not how is the “adjustment” made?

[DrokKeymaster October 27, 2020 at 7:22 am Post count: 2971]

#50919 Reply |

Hello,

Sorry, we just found there is a mistake. It doesn’t  support USB 3.0 fast charging protocol.  USB 3.0 is new power delivery protocol, our item are not update yet.

Best regards.

[paul jozef October 30, 2020 at 12:39 am Post count: 0]

#51144 Reply |

Thank you for the USB 3.0 clarification.

I still need the questions asked on October 26, 2020 at 11:10 pm answeres.

[DrokKeymaster October 30, 2020 at 8:37 am Post count: 2971]

#51178 Reply |

Hello paul jozef,

090646 is a boost converter. Only boost mode is avilable.  If you want to step down voltage from 6v to 5v, we are sorry it can’t do that.

And identify circuit can’t be changed directly by user.  We need  to have  manufacturer to make custom item.

Best regards.

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