Datasheet > MAX8934B

MAX8934B

更新时间： 2024-11-27 14:57:31

品牌	Logo	应用领域
亚德诺 - ADI		电池
页数	文件大小	规格书
32页	1338K
描述
双输入线性充电器，具有智能电源选择器，提供高级电池温度监测

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数据手册

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MAX8934B 数据手册

EVALUATION KIT AVAILABLE

MAX8934A–MAX8934E

Dual-Input Linear Chargers, Smart Power Selector

with Advanced Battery Temperature Monitoring

General Description

Features

Li+ Charger with Smart Power Selector, No

The MAX8934_ dual-input Li+/Li-Poly linear battery char-

gers with Smart Power SelectorK safely charge a single

Li+/Li-Poly cell in accordance with JEITA recommenda-

tions. The MAX8934_ monitors the battery temperature

External MOSFETs Needed

Monitors Battery Temperature and Adjusts Charge

Current and Termination Voltage Automatically

per JEITA Recommendations

BATT

) while charging, and automatically adjusts the

fast-charge current and charge termination voltage as the

battery temperature varies. The MAX8934_ also monitors

the battery temperature while the battery is discharging,

and provides a warning flag (OT) to the system in the

event that the battery is over temperature. Two safety pro-

files are supported (see Figure 6 for details). An ultra-low

OT Flags System of a Hot Battery During

Discharge

Ultra-Low I , Always-On 3.3V LDO

Common or Separate USB and Adapter Inputs

Automatic Adapter/USB/Battery Switchover

Load Peaks in Excess of Adapter Rating are

Supported by Battery

I , always-on LDO provides an additional 3.3V supply for

system power.

The MAX8934_ operates with either separate inputs

for USB and AC adapter power*, or from a single input

that accepts both. All power switches for charging and

switching the load between battery and external power

are included on-chip. No external MOSFETs are required.

Input OVP to 16V (DC) and 9V (USB)

40mI SYS-to-BATT Switch

Thermal Regulation Prevents Overheating

4.35V or 5.3V SYS Regulation Voltage

1.5A (max) USB Input Current Limit (MAX8934D)

The MAX8934_ features a Smart Power Selector to make

the best use of limited USB or adapter power. Input cur-

rent limit and battery charge current limit are indepen-

dently set. Input power not used by the system charges

the battery. Charge current limit and DC current limit can

be set up to 1.5A and 2A, respectively, while USB input

current can be set to 100mA or 500mA for the MAX8934A/

MAX8934B/MAX8934C/MAX8934E and up to 1.5A (max)

for the MAX8934D. Automatic input selection switches the

system load from battery to external power.

Ordering Information

PART

MAX8934AETI+

TEMP RANGE

PIN-PACKAGE

-40NC to +85NC

28 Thin QFN-EP**

+Denotes a lead(Pb)-free/RoHS-compliant package.

**EP = Exposed pad.

Ordering Information continued and Selector Guide appears

at end of data sheet.

The MAX8934A provides a SYS output voltage of 5.3V,

while the MAX8934B–MAX8934E provides a SYS output

voltage of 4.35V.

Typical Operating Circuit

LDO

3.3V ALWAYS-ON

LINEAR

Other features include overvoltage protection (OVP),

open-drain charge status and fault outputs, power-OK

monitors, charge timers, and a battery thermistor moni-

tor. Additionally, on-chip thermal limiting reduces the

battery charge-rate to prevent charger overheating.

The MAX8934_ is available in a 28-pin, 4mm x 4mm,

TQFN package.

REGULATOR

SYS

ADAPTER

CHARGE

CURRENT

LOAD

CURRENT

SYSTEM

LOAD

Applications

CHARGE

PDAs, Palmtop, and Wireless Handhelds

Portable Media, MP3 Players, and PNDs

Digital Still Cameras and Digital Video Cameras

Handheld Game Systems

AND

SYS LOAD

SWITCH

USB Q2

BATT

GND

USB

BATTERY

MAX8934A−

MAX8934E

Smart Power Selector is a trademark of Maxim Integrated

Products, Inc.

*Protected by U.S. Patent #6,507,172.

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

19-4995; Rev 3; 1/14

12 3 4 5 6 7...32

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与MAX8934B相关器件

型号	品牌	获取价格	描述	数据表
MAX8934BETI+	MAXIM	获取价格	Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitor
MAX8934BETI+T	MAXIM	获取价格	Power Management Circuit, BICMOS, PQCC28,
MAX8934C	ADI	获取价格	双输入线性充电器，具有智能电源选择器，提供高级电池温度监测
MAX8934CETI+	MAXIM	获取价格	Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitor
MAX8934CETI+T	MAXIM	获取价格	Power Management Circuit, BICMOS, PQCC28,
MAX8934D	ADI	获取价格	双输入线性充电器，具有智能电源选择器，提供高级电池温度监测
MAX8934DETI+	MAXIM	获取价格	Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitor
MAX8934DETI+T	MAXIM	获取价格	Power Management Circuit, BICMOS, PQCC28,
MAX8934E	MAXIM	获取价格	Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitor
MAX8934E	ADI	获取价格	双输入线性充电器，具有智能电源选择器，提供高级电池温度监测