Datasheet > HM4066

HM4066

更新时间： 2024-11-11 02:51:31

品牌	Logo	应用领域
华之美 - HMSEMI		电池
页数	文件大小	规格书
19页	1488K
描述
Switch Mode Li-Ion/Polymer Battery Charger

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中文翻译

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数据手册

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HM4066 数据手册

HM4066-4.2 /8.4/ 8.34

Switch Mode Li-Ion/Polymer

Battery Charger

DESCRIPTION

FEATURES

ꢀ

Wide Input Supply Voltage Range:

The HM4066 is a constant current, constant voltage

Li-Ion battery charger controller that uses a current mode

PWM step-down (buck) switching architecture. With a

500kHz switching frequency, the HM4066 provides a

small, simple and efficient solution to fast charge one

(4.2V) or two (8.4V) cell lithium-ion batteries.

4.8V to 20V – 4.2 Version

8.9V to 20V – 8.4 Version

8.9V to 20V – 8.34 Version

ꢀ

500kHz Switching Frequency

End-of-Charge Current Detection Output

12 Hour Charge Termination Timer

±1% Charge Voltage Accuracy

±10% Charge Current Accuracy

Low 10µA Reverse Battery Drain Current

Automatic Battery Recharge

The HM4066 charges the battery in three phases:

conditioning, constant current, and constant voltage. An

external sense resistor sets the charge current with ±10%

accuracy. An internal resistor divider and precision

reference set the final float voltage to 4.2V per cell with ±

1% accuracy. An internal comparator detects the near

end-of-charge condition while an internal timer sets the

total charge time and terminates the charge cycle. The

HM4066 automatically re-starts the charge if the battery

voltage falls below an internal threshold, 4.05V per cell.

The HM4066 also automatically enters sleep mode when

DC supplies are removed.

Automatic Trickle Charging of Low Voltage

Batteries

ꢀ

Automatic Sleep Mode for Low Power

Consumption

ꢀ

Battery Temperature Sensing

Stable with Ceramic Output Capacitor

Support up to 3A Charge Current

8-Lead SOP Package

The HM4066 is available in the 8-lead SOP package.

RoHS Compliant and 100% Lead (Pb)-Free

Halogen-Free

APPLICATIONS

ꢀ

Small Notebook Computer

Portable DVD

Typical Operating Performance

Handheld Instruments

Efficiency vs Input voltage

100

(Curves include input diode)

HM4066-8.4

HM4066-4.2

VBAT=3.8V

VBAT=4.0V

VBAT=7.0V

VBAT=8.0V

Input Voltage (V)

12 3 4 5 6 7...19

中文翻译

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