SunFounder PiPower
reaches the DC-DC protection temperature of 75 degrees Celsius, the DC-DC will shut down to prevent overheating
damage.
D8 LED
The D8 LED is a charging status indicator provided by the IP2326 charging chip. Originally, this light was designed
to indicate both the charging status and any abnormalities with the battery. However, it can only detect if there’s
current flow in the charging output. This output current can be routed through a DC-DC converter to output 5V. In
simpler terms, when there’s insufficient input power, the battery will supplement the power supply, and during this, the
LED remains steadily lit, which can be misleading. However, the LED was retained as it can indicate if the battery is
functioning normally (the LED will blink if the battery isn’t inserted).
3.2 Battery Indicators
The relationship between the battery indicators and voltage is as follows:
• 4 LEDs all on: voltage > 7.7V
• 3 LEDs on: voltage > 7.2V
• 2 LEDs on: voltage >6.7V
• 1 LED on: voltage > 6.4V
• 4 LEDs all off: voltage <6Vat this timebatteries need to be charged.
3.2. Battery Indicators 17
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