Lithium Battery Management “Power Bank” Board, Charge + Boost
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- Based on Chinese power bank IC (portable battery power supply), this is the demo board.
- Support Lithium battery charge on 2A rate. Single 2A boosted 5V output or two 1.2A 5V output, great for portable 5V device like Raspberry pi.
- SOP8 and simpe perpherial circuit, very good performace.
- Due to the simple perpherial circuit, it is easy to redesign and customize.
- Board interface inlcudes:
- Two reserved USB output
- MicroUSB 5V charge input
- XH2.54 and 2-pin battery connecto
- 4 LEDs battery volume indicator (100%, <75%, <50%, <25%)
- Push button and light: short press to acivate from sleep, or long press to turn on/off light.
- Can use to power up raspberry pi with wifi dongle, 850mA battery up about 2-4 hours.
- Board will auto enter into sleep mode when no load or small load. In this case, please periodically press key button (or program to press by external signal), or enlarge load use.
- Output two USB A port and XH2.54 smd connector is not soldered yet.
- Schematic available on this page. IC can contact us to buy.
- Early design demo video (LED battery volume sequency is wrong, fixed on final board)
Features of IC:
- Synchronous switch charge and discharge
- 2.4A synchronous boost conversion, 2.1A synchronous switch charging
- boost efficiency up to 96%
- Charging efficiency up to 97%
- Built-in power path management, support edge charge side
- support load large current line fill function
- adaptive charge current regulation, matching all adapters
- Charging voltage accuracy: ± 0.5%
- Supports 4.20 / 4.30 / 4.35 / 4.40V battery
- Power display
- support 4,3,2,1 LED power display
- Push the key
- Built-in lighting driver
- Automatically detect phone insertion and removal
- Low power consumption
- intelligent identification load, automatic standby
- Standby power consumption is less than 100 μA
- BOM minimalist
- Power MOS built-in, single inductor to achieve charge and discharge
- Multiple protection, high reliability
- output overcurrent, overvoltage, short circuit protection
- input overvoltage, overcharge, over discharge, over-current discharge protection
- machine over-temperature protection
- ESD 4KV, instantaneous pressure 12V