Datasheet > MC34671

MC34671

更新时间： 2024-11-07 00:04:35

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		/
页数	文件大小	规格书
22页	597K
描述
Power Management IC

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MC34671 数据手册

Document Number: MC34671

Rev. 1.0, 01/2008

Freescale Semiconductor

Advance Information

High Input Voltage 600mA

Charger for Single-cell Li-Ion

Batteries

34671

The MC34671 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 cell phones, Bluetooth accessories and MP3

players.

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 600mA 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 MC34671 also protects the system with its input over-voltage

protection (OVP) feature. In addition, the MC34671 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)

EP SUFFIX (PB-FREE)

98ASA10774D

8-PIN UDFN

ORDERING INFORMATION

Temperature

Package

Device

MC34671AEP/R2

Range (T )

-40°C to 85°C

8-UDFN

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.

Features

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

• Guaranteed maximum 600mA programmable CC-mode current

•

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

±5% current accuracy over -40°C to 85°C

• 28V maximum voltage for the power input with 11V 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

34671

V_IN

TO BATTERY

VIN

BAT

C_IN

GND

C_OUT

ISET

R_ISET

V_IO

CHG

PPR

OFF

TO MCU

FAST

Figure 1. 34671 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MC34671相关器件

型号	品牌	获取价格	描述	数据表
MC34671AEP	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
MC34671AEP/R2	FREESCALE	获取价格	High Input Voltage 600mA Charger for Single-cell Li-Ion Batteries
MC34671AEPR2	NXP	获取价格	Battery Charger, single cell, 0.6Amp, QFN 8, Reel
MC34673	FREESCALE	获取价格	High Input Voltage 1.2A Charger for Single-cell Li-Ion Batteries
MC34673AEP	FREESCALE	获取价格	High Input Voltage 1.2A Charger for Single-cell Li-Ion Batteries
MC34673AEP	NXP	获取价格	Battery Charger, single cell, 1.2A, QFN 8
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

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