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MM1639 Datasheet Lithium-ion Battery Charge Control

Manufacturer: MITSUMI

Overview: MITSUMI Lithium-Ion Battery Charge Control (with timers) MM1639 Lithium-Ion Battery Charge Control (with timers) Monolithic IC MM1639 Outline This is a lithium-ion battery charge control IC. It incorporates constant-voltage and constant-current circuits for easy implementation of lithium-ion battery charge. It includes functions to disable charging to overdischarged batteries, disable charging due to abnormal temperature, etc., and timer functions. It is also equipped with a 2-channel LED driver to allow the charge status to be displayed.

Datasheet Details

Part number MM1639
Manufacturer MITSUMI
File Size 104.18 KB
Description Lithium-Ion Battery Charge Control
Datasheet MM1639-MITSUMI.pdf

Key Features

  • 1. Operating supply voltage 2.7~5.9V 2. Operating ambient temperature -20~70ºC 3. Current consumption 5.0mA typ. 4. Low voltage detection voltage 2.0V typ. 5. BAT pin output voltage 4.20±0.03V (Ta=0~50ºC) 6. Recharge detection voltage 3.90V typ. 7. Precharge detection voltage 2.90V typ. 8. Fast-charge current setting Rsense=0.22V/IqCHG Example: For 0.70A, 0.22V/0.70A=0.31Ω (Rsence) Precharge current 0.026V/Rsence=0.02.

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