Datasheet > MC34674A

MC34674A

更新时间： 2024-11-07 04:40:51

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		电池
页数	文件大小	规格书
26页	716K
描述
High Input Voltage Travel Charger for Single-cell Li-Ion Batteries

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MC34674A 数据手册

Document Number: MC34674

Rev. 1.0, 01/2008

Freescale Semiconductor

Advance Information

High Input Voltage Travel

Charger for Single-cell Li-Ion

Batteries

34674

The MC34674 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 high input voltage, up to 28V, allows low-cost ac/dc

converters to be used for further system cost reduction. A typical

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 8% accuracy and the constant-

output voltage in the CV-mode is fixed at 4.2V with 0.4% accuracy over

-20°C to 70°C temperature range.

POWER MANAGEMENT IC

EP SUFFIX (PB-FREE)

98ASA10774D

8-PIN UDFN

The MC34674 has all the 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 also protects the

system with its input over-voltage protection (OVP) feature. In addition,

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. All

the above functions are fit into a small 8-lead 2X3 UDFN package.

ORDERING INFORMATION

Temperature

Package

Device

MC34674AEP/R2

Range (T )

-40°C to 85°C

8-UDFN

Features

• No external MOSFET, reverse-blocking diode or current-

sense resistor are required

• 28V maximum input voltage rating with 11V over-voltage

protection threshold

• Factory programmable charge current

• Trickle charge for fully discharged batteries

• Driving a dual-color LED and smart battery connection

verification optimized for travel charger applications

• Interface to NTC thermistor

• Internal timer and thermal current limit

• Small 2X3 mm²thermally enhanced UDFN package

• Pb-free packaging designated by suffix code EP

•

±0.4% voltage accuracy over -20°C to 70°C

34674

V_IN

VIN

BAT

TO BATTERY

C_OUT

C_IN

R_PU

VREF

TEMP

RED

GRN

R_S

TO BATTERY NTC

(THERMISTOR)

OFF

GND

Figure 1. 34674 Simplified Application Diagram

* This document contains certain information on a new product.

Specifications and information herein are subject to change without notice.

12 3 4 5 6 7...26

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与MC34674A相关器件

型号	品牌	获取价格	描述	数据表
MC34674AEP	NXP	获取价格	IC,BATTERY MANAGEMENT,LLCC,8PIN,PLASTIC
MC34674AEP/R2	FREESCALE	获取价格	High Input Voltage Travel Charger for Single-cell Li-Ion Batteries
MC34674AEP/R2	NXP	获取价格	1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8, 2 X 3 MM, 0.65 MM HEIGHT, 0.5 MM PITCH, ROHS
MC34674B	FREESCALE	获取价格	High Input Voltage Travel Charger for Single-cell Li-Ion Batteries
MC34674BEP/R2	FREESCALE	获取价格	High Input Voltage Travel Charger for Single-cell Li-Ion Batteries
MC34674BEP/R2	NXP	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, 2 X 3 MM, 0.65 MM HEIGHT, 0.50 MM PITCH, ROHS C
MC34674C	FREESCALE	获取价格	High Input Voltage Travel Charger for Single-cell Li-Ion Batteries
MC34674CEP	NXP	获取价格	IC,BATTERY MANAGEMENT,LLCC,8PIN,PLASTIC
MC34674CEP/R2	FREESCALE	获取价格	High Input Voltage Travel Charger for Single-cell Li-Ion Batteries
MC34674D	FREESCALE	获取价格	High Input Voltage Travel Charger for Single-cell Li-Ion Batteries

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