SunFounder PiPower
– Capacity: 2000mAh
– Connector: PH2.0, 3P
• Over Discharge Protection Voltage6.0V
• Overcharge Protection Voltage8.4V
• Dimension: 90mm x 60mm x 24.9mm
• On-board Indicators
– 1 x Charging Indicator (CHG)
– 1 x Power Indicator (PWR)
– 4 Battery Indicators (D4 ~ D7)
• On-board Power Switch
• On-board MCU ESP32 S2
3.1 Detailed Introduction
STAT LED
The STAT LED is the status indicator for the ESP32 S2.
• Off: ESP32 S2 is powered off.
• Slow blinking: ESP32 S2 is powered on, but Wi-Fi is not connected.
• Steady on: ESP32 S2 is powered on and Wi-Fi is connected.
Note: The so-called “ESP32 S2 powered off” state refers to the situation when the USB Type C power is connected.
In this state, the ESP32 S2 is technically “powered off” but not completely shut down. The power LED still requires
the ESP32 S2 to control its illumination, and some functions may remain operational. However, when you unplug the
USB Type C power, the ESP32 S2 will shut down completely.
Switch Power Path
PiPower Pro integrates a power path function that automatically switches power paths to ensure maximum output
protection.
1. When external power is connected, the 5V output is directly supplied through the external USB Type C and can
be turned off using the switch. The external power source charges the battery with as much current as possible
(see charging current) while ensuring the input voltage is greater than 4.6V.
2. In the moment of power disconnection, the system automatically switches to battery power output with seamless
transition, ensuring the system can function properly during power interruptions.
3. If the external power is below 4.6V, the system automatically switches to battery backup power to prevent external
devices from losing power.
Table 1: Output Power Logic
Switch External Power Output Status
On Plugged in External Power
On Unplugged or voltage below 4.6V Battery Power
Off Plugged in Off
Off Unplugged or voltage below 4.6V Off
14 Chapter 3. Features
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