ET-P01

MCP73831 USB-C LiPo Charger

Name: MCP73831 USB-C LiPo Charger
Brand: ElectroTrical
SKU: ET-P01
Price: 22.00 AED
Availability: OutOfStock

500 mA / 100 mA single-cell LiPo charger, USB-C

AED 22.00

Out of stock

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Download datasheet (PDF)

Overview Key features Specifications Performance Pinout

Overview

500 mA / 100 mA single-cell LiPo charger, USB-C

The ET-P01 is built around the Microchip MCP73831-2: linear CC/CV, 4.20V ±0.75%, preconditioning, thermal regulation.

Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.

Good for

Charging LiPo cells for wearables
Battery-powered sensors
Replacing micro-USB chargers

Key features

What makes it different

Charger

Microchip MCP73831-2: linear CC/CV, 4.20V ±0.75%, preconditioning, thermal regulation

Input

USB-C 5V (Rd 5.1k → any USB-C source gives 5V); 3.75–6V on the header

Charge current

500mA default, 100mA via JP1 (rule: charge at ≤1C)

Battery

1S LiPo/Li-ion 3.7V, JST-PH 2P (Adafruit/SparkFun cell compatible)

Open documentation

Schematic, BOM and layout notes published for every board.

Breadboard friendly

Standard 2.54 mm pitch and M2.5 mounting holes.

Specifications

Technical specifications

Device
Charger	Microchip MCP73831-2: linear CC/CV, 4.20V ±0.75%, preconditioning, thermal regulation
Input	USB-C 5V (Rd 5.1k → any USB-C source gives 5V); 3.75–6V on the header
Charge current	500mA default, 100mA via JP1 (rule: charge at ≤1C)
Battery	1S LiPo/Li-ion 3.7V, JST-PH 2P (Adafruit/SparkFun cell compatible)

Board
Size	25.4 × 17.8 mm
Mounting	4 × M2.5 holes, 2.54 mm from each corner
Connectors	4-pin 2.54 mm header · USB-C 16P receptacle (USB 2.0) — USB-C power input · JST PH 2P R/A SMD (LiPo) — LiPo battery
Main IC	MCP73831T-2ACI/OT (LCSC C424093)
Revision	Rev A

Solder jumpers
JP1 (default 1–C (500mA))	Cut 1–C and bridge 2–C for 100mA (small cells < 500mAh)

Performance

Charge current settings

Charge currentSet by the PROG resistor. Rule of thumb: charge at no more than 1C, so use 100 mA for cells under 500 mAh.

JP1 open (default)500 mA

JP1 closed100 mA

Pinout

Pin map and connections

Pin	Name	Type	Function
1	`VBUS`	Power	5V from USB-C
2	`GND`	Ground	Ground
3	`VBAT`	Power	Battery +
4	`STAT`	Output	Low = charging, high = done, Hi-Z = no input

Mechanical

Dimensions and what's in the box

Board 25.4 × 17.8 mm with M2.5 holes — Top view · 25.4 × 17.8 mm

In the box

1 × ET-P01 MCP73831 USB-C LiPo Charger (assembled)
1 × 4-pin 2.54 mm male header, unsoldered

Getting started

Wire the header: VBUS, GND, VBAT, STAT

Compare

Which battery board?

	MCP73831 USB-C LiPo Charger (this board)This board	ET-P02 BQ24074 Solar / USB-C Charger	ET-P09 LiPo Power Bank Module	ET-P08 1S LiPo Protection Board
What it does	500 mA / 100 mA single-cell LiPo charger, USB-C	Solar and USB-C LiPo charger with power path	USB-C charger plus 5 V 1 A boost	Over-charge, over-discharge and short protection, 4 A
Interface	USB-C 5V (Rd 5.1k → any USB-C source gives 5V);…	USB-C 5V and 2-pin terminal 5–10V (6V solar…	—	—
Best for	Charging LiPo cells for wearables	Solar-powered sensor nodes	Portable 5 V projects	Protecting bare 18650 and LiPo cells
Price	22 AED	49 AED	49 AED	9 AED

Downloads

Documents and design files

PDFET-P01 schematicRev A LCSCMCP73831T-2ACI/OT datasheet and stockC424093

STEP3D modelComing soon

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