AV02 CR2450

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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: AV02 CR2450

URL: https://docs.leafony.com/en/leaf/power/av02/

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

Table of contents

Features

Supply 3.3V power to the leaves from a CR2450 coin cell battery. You can turn the power on or off with the switch and read the battery voltage from an MCU (microcontroller) leaf.

This leaf includes a CR2450 battery holder, a step-up power supply circuit that converts the battery’s 3V to 3.3V, and an I2C-connected AD converter for measuring battery voltage.

Specification

Dimension

Item	Description
Dimension	W25.1×D25.5×H10.5mm

Power Supply

Item	Description
Part number	TPS61099YFFR
Battery voltage	0.7～3.8V
Output voltage	3.3V±2%
Controlling method	PWM/PFM Automatic switching control
Maximum output current	300mA @3.3V to 5V
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

About the switch

Item	Description
Switch	Switch for turning on and off the 3.3v power

Sample App

Read Battery