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Features

  • Shutdown Current: 40mA

  • Power Input: USB Type-C, 5V/3A

  • Charging Power: 7.4V/1.5A 15W

  • Output Power: 5V/5A, 3.3V/1A

  • Included Batteries: 2 x 3.7V 18650 Lithium-ion Batteries, XH2.54 3P Interface

  • Battery Protection: Reverse polarity protection

  • Charging Protection: Input undervoltage protection, input overvoltage protection, charging balance, overheat protection

  • Onboard Power Indicator Light: PWR

  • Onboard 2 Battery Level Indicator LEDs

  • Onboard User LED, 2 tactile switches

  • Motor Driver: 5V/1.8A x 4

  • 4-channel 12-bit ADC

  • 12-channel PWM (8-channel shared with motor)

  • 4-channel digital signals

  • Onboard SPI interface, UART interface, I2C interface, WS2812 interface

  • Mono Speaker: 4Ω2.5W

  • Power Button: Safe shutdown

  • Microphone: Onboard I2S microphone

Compatibility and Power Notes

The Fusion HAT+ supports a wide range of commonly used servos and DC motors, including:

  • Micro servos: SG90, MG90S

  • Standard servos: MG996R, DS3218

  • SunFounder custom servos

  • Low-current DC motors: 130 series, N20 series

  • SunFounder custom DC motors with XH2.54 2-pin connectors

Servo Power (PWM Interface)

The PWM interface provides up to 5V/5A maximum output, which is shared with the Raspberry Pi.

  • When connecting multiple servos, carefully account for their current draw.

  • If the total servo current exceeds 5A, use an external power supply (BEC) to avoid overload and ensure stable operation.

DC Motor Power

DC motors are powered directly from the onboard batteries (6–8.4V).

  • Each motor channel supports up to 1.8A maximum current.

  • Do not connect motors with higher current requirements, as this may damage the motor driver chip.

Electrical Characteristics

Electrical Characteristics

Parameters:

Minimum Value:

Typical Value:

Maximum Value:

Unit:

Input Voltage:

4.25

5

8.4

V

Battery Input Voltage:

6.0

7.4

8.4

V

Overcharge Protection (Battery):

8.4

V

Input Undervoltage Protection:

4.15

4.25

4.35

V

Input Overvoltage Protection:

8.3

8.4

8.5

V

Charging Current (5V):

1.5

A

Output Current (5V):

5.0

A

Output Voltage:

5.197

5.285

5.376

V

Charging Overheat Protection:

125

135

145

°C

DC-DC Overheat Protection:

150

°C

Motor Output Current:

1.8

A

Overdischarge Protectiont:

6

V