리포 충전/게이지 스몰 파워 모듈 -MCP73831, MAX17048
(smôl Power Board LiPo)
개요
- 본 제품은 리포 충전/게이지 스몰 파워 모듈 -MCP73831, MAX17048입니다.
- MCP73831 리튬이온/리튬폴리머 충전 칩 및 MAX17048 I2C 배터리 잔량 측정 칩을 장착하고 있습니다.
- AVR ATtiny841 마이크로컨트롤러를 탑재하여 미리 정해진 시간에 deep sleep에 진입할 수 있게 하여 전류소비를 6mA까지 줄일 수 있습니다.
특징
-
Li-Ion / Li-Polymer Charger:
- MCP73831
- Charge current: 100mA (when USB power is connected)
Battery Fuel Gauge:
- MAX17048
On-Board Microcontroller:
- ATtiny841 8-bit AVR Microcontroller
- 8KBytes Flash
- 512Bytes EEPROM
- 512Bytes SRAM
Power Regulation:
- smôl 3.3V:
- AP2112K-3.3V
- IOUT (max): 600mA
- IQ: 55µA
- ATtiny841 3.3V:
- STLQ015-3.3V
- IOUT (max): 150mA
- IQ: 1.4µA
Sleep Current Draw:
- 6µA (with ATtiny841 in Power-Down Mode) (measured by Otii Arc)
smôl Specifics:
- Interface: I2C
- ATtiny841 Default Address: 0x50
- MAX17048 Fuel Gauge Address: 0x36
- PROC_PWR_EN:
- The power board pulls PROC_PWR_EN low to disable the regulator on the processor board
Properties:
- Length: 1.60" (40.6mm)
- Width: 0.42" (10.7mm)
- Height: 0.29" (7.4mm) max.
- Weight: 1.4g (0.05oz)
- PCB thickness: 0.8mm
- MCP73831
-
The smôl Power Board LiPo is an intelligent power board for the smôl ecosystem. You would expect this board to have an MCP73831 Li-Ion and Li-Polymer charger on it, and indeed it does. You would also expect this board to have a MAX17048 I2C fuel gauge on it, and indeed it does. But you probably wouldn't expect it to have an AVR ATtiny841 microcontroller on it. So why have we included one?
This is an intelligent power board for smôl. The power board takes control of the 3.3V power for the whole smôl stack. The processor board can then instruct the power board to put the entire smôl stack into deep sleep for a pre-defined interval. Sleep intervals of 10's of milliseconds to several days are possible. In deep sleep, the only device left powered is the ATtiny841 and that reduces the current draw to 6µA. Yes, you read that right, 6 microamps! smôl makes it possible for your battery life to be measured in months not days! We used the fantastic Otii Arc Power Analyzer to help us reduce the sleep current as much as possible.
Our smôl Power Board Arduino Library has examples to get you started.
문서
-
smôl Power Board LiPo Documentation:
- Schematic
- Eagle Files
- Hookup Guide
- GitHub Hardware Repo
- SparkFun smôl Power Board Arduino Library
- Arduino Examples
Li-Ion / Li-Polymer Charger:
- Datasheet (MCP73831)
Battery Fuel Gauge:
- Datasheet (MAX17048)
Microcontroller:
- Datasheet (ATtiny841)
smôl Documentation: