Microchip Technology Inc

Battery Management

The MCP1630V Bi-directional 4 Cell Li-Ion Charger Reference Design demonstrates the use of a bidirectional buck-boost converter used to charge multiple series cell Li-Ion batteries with the presence of an input source (boost) and provide a regulated output voltage when the input source is removed (buck). The board also serves as a platform to evaluate the MCP1630V device.

The MCP1640 Single Quadruple-A Battery Boost Converter Reference Design demonstrates how the MCP1640 device, with the True Output Disconnect Shutdown option, works attached to a microcontroller application. This board demonstrates how to optimize battery life using the MCP1640, and an 8-bit low cost PIC microcontroller, to reduce the No Load Input Current for applications that operate in Standby mode for a long period of time. During Standby, the enable signal for the MCP1640 has a low frequency, with less than 1% positive duty cycle. This maintains the output of the MCP1640 device up to 2.3V, which is sufficient to keep the PIC microcontroller live. This solution reduces up to 80% of the No Load Input Current the MCP1640 consumes in PFM Mode.
This evaluation board uses the MCP1640 in a high-efficiency (up to 96%), fixed frequency (500 kHz), step-up DC-DC converter. It demonstrates:

  • Easy-to-use and minimum number of external components power supply solution for applications powered by one-cell, two-cell, or three-cell alkaline, NiCd/NiMH; one-cell Li-Ion or Li-Polymer batteries
  • Selection of the best operating mode for efficiency (PWM/PFM)
  • A wide input voltage range (0.35 to 5.5V) and low start-up voltage (0.65V)
  • PCB layouts recommendation for SOT23-6 and 2x3mm-8 DFN packages
  • Three common output voltages to evaluate: 2.0V, 3.3V and 5.0V enable selection (when disabled, the MCP1640 disconnects the path from input to output for “true-disconnect”).

Devices Supported: MCP1640

The MCP7382X Li-Ion Battery Charger Evaluation Board features three circuits utilizing the MCP73826, MCP73827 and MCP73828 devices to demonstrate simple, stand-alone, linear charging of single cell Lithium-Ion/Lithium-Polymer battery packs (the battery packs are not included).

The MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board demonstrates the features and abilities of Microchip's MCP73830L single-chip linear Li-Ion battery charger. This board utilizes the MCP73830L which effectively charges Li-Ion batteries with high-accuracy, preset-voltage regulation. It is designed to allow observation of the performance of the integrated circuit via multiple test points.

Devices Supported:  MCP73830L
The MCP7941X RTCC PICtail™ Plus Daughter Board demonstrates the features and abilities of the MCP7941X and MCP7940X I²C™ Real-Time Clock/Calendar family in standard development platforms. By designing this daughter board with the PICtail Plus, PICtail and PICkit™ serial connectors, it will operate with the Explorer 16 Development Board, the PICDEM PIC18 Explorer Board, the XLP 16-bit Development Board and the PICkit Serial Analyzer tool. A 3V, 2032-size coin cell battery (not included) can be installed in the coin cell holder for backup power. Package contents includes the RTCC PICtail Plus Daughter Board and an Info Sheet.
The MCP795XX PICtail™ Plus Daughter Board demonstrates the features and abilities of the MCP795XX SPI Real-Time Clock/Calendar (RTCC) family in standard development platforms. This daughter board will support the full featured 14-pin MCP795W2X and MCP795W1X devices. By designing this daughter board with both PICtail and PICtail Plus connectors, it will operate with the Explorer 16 Development Board and the PICDEM PIC18 Explorer Board. Also included is a 3V coin cell battery for backup power to the RTCC.
The PS7070 evaluation board is NOT Recommended for New Designs. It is a battery monitor with safety based on the Microchip PS700 battery monitor. The PS7070 is designed to operate with a battery pack consisting of one (1) or two (2) series connected Li-Ion / Poly cells. This board is designed for evaluation and prototyping with the PS700 IC.