KIT34674EPEVBE: Evaluation Kit - 34674, Single-Cell Li-Ion/Li-Poly Charger

Overview

The Evaluation Kit features the MC34674, which is a fully integrated single-cell Li-Ion and Li-Polymer battery charger optimized for travel charger applications. The few external components required include a dual-color LED for charge-status indication, a negative-temperature-coefficient (NTC) thermistor circuit for setting the charge temperature window, and two decoupling capacitors.

The MC34674 tolerates an input voltage up to 28V, which allows low-cost ac/dc converters to be used for further system-cost reduction. A charge cycle of the MC34674 includes trickle, constant-current (CC) and constant-voltage (CV) charge modes. The CC-mode current is selectable from 50mA to 1.05A, with 10% accuracy and the constant-output voltage in the CV-mode is fixed at 4.2V.

The MC34674 has many features such as trickle charging for a deeply-discharged battery, an internal timer for termination to prevent charging a failed battery, charger current thermal foldback for thermal protection, and smart battery-connection verification to prevent charging in case there is no battery connected. It has a 2.6V falling power-on-reset (POR) threshold, making it perfect to work with current-limited power supplies. When the charger is disabled, the BAT pin leaks less than 1µA current from the battery.

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Specifications

Technical and Functional Specifications

Power Management	28 V maximum input voltage rating with 11 V over-voltage-protection threshold ±0.4% voltage accuracy over -20 to 70 °C Factory programmable charge current Trickle charge for fully discharged batteries
User Components	Driving a dual-color LED and smart battery-connection verification optimized for travel charger applications
	No external MOSFET, reverse-blocking diode, or current-sense resistor is required Interface to NTC thermistor

Supported Devices

Power Management

MC34674 : Single-Cell Li-Ion/Li-Polymer Battery Travel Charger

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KIT34674EPEVBE ^Active
Evaluation Kit - MC34674, High-Input-Voltage Travel Charger for 1-Cell Li-Ion/Li-Polymer Batteries
- KIT34674EPEVBE Hardware
- Quick Reference Guide

- KIT34674EPEVBE
- 1 @ US
- $70.00
- Buy Direct
  
  Availability?

Documents and Software

Get Started with the KIT34674EPEVBE Evaluation kit

“Everything you need to get started with the KIT34674EPEVBE Evaluation Kit”.
MC34674, High Input Voltage Travel Charger for Single-cell Li-Ion Batteries
- 20 Nov 2008
- 597.2 kB
KIT34674EPEVBE, Using the High-Input-Voltage Travel Charger for Single Cell Li-Ion Batteries - User Guide
- 18 Jun 2009
- 267.3 kB
KIT34674EPGRBR: Gerber files for the KIT34674EPEVBE Evaluation board
- 04 Sep 2007
- 268.3 kB

Design Resources ( 1 )

Design Tools & Files ( 1 )
- Printed Circuit Boards and Schematics ( 1 )

Documents

Data Sheet ( 1 )

MC34674, High Input Voltage Travel Charger for Single-cell Li-Ion Batteries^{(REV
2.0
)}

The MC34674 is a fully-integrated single-cell Li-Ion battery charger optimized for travel charger applications.
- 20 Nov 2008
- pdf
- 597.2 kB
- MC34674
- [ English ]

Users Guide ( 1 )

KIT34674EPEVBE, Using the High-Input-Voltage Travel Charger for Single Cell Li-Ion Batteries - User Guide^{(REV
1.0
)}

This User Guide helps the Li-Ion battery travel charger designer to understand the MC34674 and its evaluation board. It illustrates the design procedure when using MC34674 to design a Li-Ion battery charger and the way to get the best performance of the MC34674.
- 18 Jun 2009
- pdf
- 267.3 kB
- KT34674UG
- [ English ]

Design Resources

Design Tools & Files ( 1 )

Printed Circuit Boards and Schematics ( 1 )

KIT34674EPGRBR: Gerber files for the KIT34674EPEVBE Evaluation board^{(REV
A
)}

Downloadable Gerber files used to build the EVB PCB
- 2007-09-04 00:00:00
- zip
- 268.3 kB
- KIT34674EPGRBR
Download

KIT34674EPEVBE: Evaluation Kit - 34674, Single-Cell Li-Ion/Li-Poly Charger

Overview

Specifications

Technical and Functional Specifications

Supported Devices

Power Management

Buy

KIT34674EPEVBE Active

Documents and Software

Get Started with the KIT34674EPEVBE Evaluation kit

Documents ( 2 )

Design Resources ( 1 )

Documents

Data Sheet ( 1 )

MC34674, High Input Voltage Travel Charger for Single-cell Li-Ion Batteries (REV 2.0 )

Users Guide ( 1 )

KIT34674EPEVBE, Using the High-Input-Voltage Travel Charger for Single Cell Li-Ion Batteries - User Guide (REV 1.0 )

Design Resources

Design Tools & Files ( 1 )

Printed Circuit Boards and Schematics ( 1 )

KIT34674EPGRBR: Gerber files for the KIT34674EPEVBE Evaluation board (REV A )

KIT34674EPEVBE ^Active

MC34674, High Input Voltage Travel Charger for Single-cell Li-Ion Batteries^{(REV
2.0
)}

KIT34674EPEVBE, Using the High-Input-Voltage Travel Charger for Single Cell Li-Ion Batteries - User Guide^{(REV
1.0
)}

KIT34674EPGRBR: Gerber files for the KIT34674EPEVBE Evaluation board^{(REV
A
)}