Datasheet > MC34673AEP

MC34673AEP

更新时间： 2024-11-08 15:19:03

品牌	Logo	应用领域
恩智浦 - NXP		电池
页数	文件大小	规格书
22页	844K
描述
Battery Charger, single cell, 1.2A, QFN 8

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MC34673AEP 数据手册

Document Number: MC34673

Rev. 1.0, 01/2008

Freescale Semiconductor

Advance Information

High Input Voltage 1.2A Charger

for Single-cell Li-Ion Batteries

34673

The MC34673 is a cost-effective fully-integrated battery charger for

Li-Ion or Li-Polymer batteries. The high input voltage, up to 28V,

eliminates the input over-voltage protection circuit required in handheld

devices such as PDAs, cell phones, portable video game players and

digital still cameras.

POWER MANAGEMENT IC

A typical charge cycle includes trickle, constant-current (CC) and

constant-voltage (CV) charge modes. The CC-mode current is

programmable up to 1.2A with an external resistor. The voltage across

the external resistor is also used to monitor the actual charge current.

The constant voltage is fixed at 4.2V with 0.7% accuracy over a -20°C

to 70°C temperature range. The trickle-mode current is preset to 20%

of the CC-mode current when the battery voltage is lower than the

trickle-mode threshold. The end-of-charge (EOC) current threshold is

preset to 10% of the CC-mode current to save the board space and

cost. A charge current thermal foldback feature limits the charge

current when the IC internal temperature rises to a preset threshold.

The MC34673 also protects the system with its input over-voltage

protection (OVP) feature. In addition, the MC34673 has a 2.6V falling

power-on-reset (POR) threshold, making it perfect to work with current

limited power supplies. Three indication pins (PPR, CHG and FAST)

can be simply interfaced to a microprocessor or LEDs. When no power

supply is connected, or when disabled, the charger draws less than

1.0µA leakage current from the battery.

EP SUFFIX (PB-FREE)

98ASA10774D

8-PIN UDFN

ORDERING INFORMATION

Temperature

Package

Device

MC34673AEP/R2

Range (T )

-40°C to 85°C

8-UDFN

Features

• No external MOSFET, reverse-blocking diode or current-sense resistor are required

• Guaranteed maximum 1.2A programmable CC-mode current

•

±0.7% voltage accuracy over -20°C to 70°C

±6% current accuracy over -40°C to 85°C

• 28V maximum voltage for the power input with 6.8V over-voltage protection threshold

• 2.6V minimum input operating voltage

• Trickle charge for fully discharged batteries

• Charge current monitor

• Charge current thermal foldback

• Pb-free packaging designated by suffix code EP

34673

V_IN

VIN

TO BATTERY

BAT

C_IN

GND

C_OUT

ISET

R_ISET

CHG

PPR

V_IO

OFF

TO MCU

FAST

Figure 1. 34673 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...22

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与MC34673AEP相关器件

型号	品牌	获取价格	描述	数据表
MC34673AEPR2	FREESCALE	获取价格	High Input Voltage 1.2A Charger for Single-cell Li-Ion Batteries
MC34674	FREESCALE	获取价格	High Input Voltage Travel Charger for Single-cell Li-Ion Batteries
MC34674_08	FREESCALE	获取价格	High Input Voltage Travel Charger for Single-cell Li-Ion Batteries
MC34674A	FREESCALE	获取价格	High Input Voltage Travel Charger for Single-cell Li-Ion Batteries
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

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