AV04A 2V～4.5V

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Read this official Leafony page and explain its key points in English. For hardware help, first ask for a photo or the installed leaf models, assembly and power sources, then the goal and tools. Clarify which LED or display changed and whether a cable or leaf was replaced. Do not equate an unseen reset button with an absent one, or I2C acknowledgement with a working display. Verify specifications against sources; distinguish observations from hypotheses. Follow a redirect to its destination; if unreadable, ask for the relevant text instead of guessing.

Page: AV04A 2V～4.5V

URL: https://docs.leafony.com/en/leaf/power/av04/

Description / headings (excerpt): Features / Specification / Dimension / Power Supply

Features

Supply 3.3V power to the leaves from an external battery. You can turn the power on or off with the switch and read the battery voltage from an MCU (microcontroller) leaf. The SH connector is intended for two or three dry cells, or Li-Po and Li-ion batteries within the stated voltage range.

This leaf includes a JST SH battery connector, a step-up/down power supply circuit that converts a battery voltage of 2 to 4.5V to 3.3V, and an I2C-connected AD converter for measuring battery voltage.

Specification

Dimension

Item	Description
Dimension	W23×D21×H6.2mm

Power Supply

Item	Description
Part number	RP604K331B-TR
Battery voltage	1.8～5.5V
Output voltage	3.3V±2%
Controlling method	PWM/PFM Automatic switching control
Maximum output current	300mA (when step down)
Protection circuit	Over current protection / Thermal shutdown

AD Converter

Item	Description
Part number	ADC081C027CIMK
Resolution	8bit
Reference voltage	Vdd(3.3V)
Sample rate	188.9kSPS(max)
Interfaces	I2C (Address: 0x50)

Block diagram

Pinassign

Tips

Switches and Connectors

Item	Description
Switch	Switch for turning on and off the 3.3v power
Connector	JST SH connector