Datasheet > HM4050BMR

HM4050BMR

更新时间： 2024-11-11 02:55:27

品牌	Logo	应用领域
华之美 - HMSEMI		/
页数	文件大小	规格书
12页	957K
描述
highly integrated Li-Ion and Li-Pol linear chargers

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数据手册

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HM4050BMR 数据手册

HM4050B

GENERAL DESCRIPTION

FEATURES

The HM4050B series of devices are highly integrated Li-Ion

and Li-Pol linear chargers targeted at small capacity

battery for portable applications. It is a complete

constant-current/ constant voltage linear charger. No

external sense resistor is needed, and no blocking diode

is required due to the internal MOSFET architecture. It

can deliver up to 150mA of charge current (using a good

thermal PCB layout) with a final float voltage accuracy of

±1%. The charge voltage is fixed at 4.2V or 4.35V, and

the charge current can be programmed externally with

a single resistor. The charger function has high accuracy

current and voltage regulation loops and charge

termination.

Charging

1% Charge Voltage Accuracy

5% Charge Current Accuracy

Support Application for Very Low Charge Currents –

1mA to 150mA

Support minimum 0.1mA Charge Termination

Current

45nA Maximum Battery Output Leakage Current @

0℃~85℃

High Voltage Chemistry Support: up to 4.35V

Others

Output Short-Circuit Protection

Soft-Start Limits Inrush Current

Charge Status Output Pin

Automatic Recharge

The HM4050B automatically terminates the charge cycle

when the charge current drops to 1/10 the programmed

value after the final float voltage is reached.

APPLICATIONS

 Fitness Accessories

When the input supply (wall adapter or USB supply) is

removed, the HM4050B will shut off, only 40nA leakage

current coming from battery at sleep mode when

ambient temperature is 85℃, so it can save energy and

improve standby time.

 Smart Watches

 Bluetooth Handsets

 Wireless Low-Power Handheld Devices

MARKING DESCRIPTION

The HM4050B is available in a small package with SOT23-

NXYWV

5L. Standard product is Pb-Free and Halogen-free.

“N”: Product code, here use “Y” stand for “HM4050B”

“X”: Package factory

“Y”: Wafer foundry vendor

“W”: The week of manufacturing

E.g.: “A”stands for week 1, “Z”stands for week 26,

“a”stands for week 27, “z” stands for week 52.

“V”: Product version code

12 3 4 5 6 7...12

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