Features • Integrated power FETs with thermal regulation • Charges from either an AC wall adapter or USB power source with automatic source selection • 50 mA to 1000 mA charge currents using AC wall adapter • Pin-selectable USB charge currents of 100 mA or 500 mA • LDO mode with 1A of source current is automatically invoked when the battery is absent and the AC wall adapter is connected • Continuous battery temperature monitoring • Built-in multiple safety timers • Charge status indication • Continuous over-current and temperature protection • Near-depleted battery pre-conditioning • Sleep mode with ultra low quiescent current • On-board Kelvin-sensing achieves ±0.35% termination accuracy • Maintenance mode with automatic recharge • Thermally enhanced 3 mm x 3 mm LLP package Description The LM3658 is a single chip charger IC designed for handheld applications. It can safely charge and maintain a single cell Li-Ion/Polymer battery operating from an AC wall adapter or USB power source. Input power source selection of USB/AC is automatic. With both power sources present, the AC power source has priority. Charge current is programmed through an external resistor when operating from an AC wall adapter allowing charge currents from 50 mA to 1000 mA. When the battery is charged using USB power, charge currents of 100 mA or 500 mA are pin-selectable. The termination voltage is controlled to within ±0.35% of 4.2V. The LM3658 requires few external components and integrates internal power FETs, reverse current protection and current sensing. The internal power FETs are thermally regulated to obtain the most efficient charging rate for a given ambient temperature. The LM3658 operates in five modes: pre-qualification mode, constant-current mode, constant-voltage mode, top-off mode and maintenance mode. Additionally, the charger IC operates as a linear regulator in “LDO mode”, when the AC wall adapter is connected and no battery is present. Optimal battery management is obtained through thermal regulation, battery temperature measurement and multiple safety timers. The LM3658 provides two open-drain outputs for LED status indication or connection to GPIOs. Applications • Smartphones • Digital still cameras • PDAs • Hard Drive and flash-based MP3 players • USB-powered devices

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Datasheet

Title		Size	Date	Other Language
	LM3658 Dual Source USB/AC Li Chemistry Charger IC for Portable Applications	329 Kbytes	10-Mar-07

Featured Application Notes

Title		Size	Date	Other Language
	AN-1517: Application Note 1517 LM3658 Evaluation Kit	439 Kbytes	24-Oct-06	中文

More Application Notes

Title		Size	Date	Other Language
	AN-87: Application Note 87 Comparing the High Speed Comparators	249 Kbytes	1-Oct-02
	AN-294: Application Note 294 Special Sample and Hold Techniques	233 Kbytes	4-Oct-04

Design Tools

Reference Design

RD-167 - High Efficiency Portable Media Player (PMP) Docking Station

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM3658SD	CMOS7	0	18406	0	0	1089000	4	309006723
LM3658SD-A	CMOS7	0	18406	0	0	1089000	4	309006723
LM3658SD-B	CMOS7	0	18406	0	0	1089000	4	309006723
LM3658SDX	CMOS7	0	18406	0	0	1089000	4	309006723
LM3658SDX-A	CMOS7	0	18406	0	0	1089000	4	309006723
LM3658SDX-B	CMOS7	0	18406	0	0	1089000	4	309006723

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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