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SC813 Datasheet(PDF) 1 Page - Semtech Corporation |
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SC813 Datasheet(HTML) 1 Page - Semtech Corporation |
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1 / 23 page  © 2008 Semtech Corporation POWER MANAGEMENT 1 SC811 / SC813 Adapter/USB Tri-Mode Single-cell Li-ion Charger Features Single input charger with three charging modes Constant voltage — 4.2V, 1% regulation Fast-charge current regulation — 15% at 70mA, 9% at 700mA Charging by current regulation, voltage regulation, and thermal limiting Input voltage protection — 30V Current-limited adapter support capability — reduces power dissipation in charger IC USB high and low power modes limit charge current to prevent USB Vbus overload Instantaneous CC-to-CV transition for faster charging Programmable battery-dependent currents (adapter mode fast- and pre-charge, termination) Programmable source-limited currents (USB-high mode fast-charge, and USB-low mode fast- and pre-charge) Independent programming of termination current with dual-mode operation Three termination options — float-charge, automatic re-charge, or forced re-charge to keep the battery topped-off after termination without float-charging Soft-start reduces adapter or USB load transients High operating voltage range of SC811 permits use of unregulated adapters Complies with CCSA YD/T 1591-2006 Space saving 2x2x0.6 (mm) MLPD package WEEE and RoHS compliant Applications Mobile phones MP3 players GPS handheld receivers Description The SC811 and SC813 are highly versatile single input triple mode (adapter/USB high current, USB low current) linear single-cell Li-ion battery chargers, each in an 8 lead 2x2 MLPD ultra-thin package. The input will survive sus- tained input voltage up to 30V to protect against hot plug overshoot and faulty charging adapters. The SC811 has 9.6V rising, 8.2V falling OVP thresholds for general purpose charging with low cost adaptors. The SC813 has 6V rising, 5.6V falling OVP thresholds for customers utilizing charg- ing adapters with specifications that are similar to a USB Vbus supply. The SC811 and SC813 differ only in OVP threshold. Charging begins automatically when an input source is applied to the charging input. Thermal limiting protects against excessive power dissipation. The charger can be programmed to turn off when charging is complete or to continue operating as an LDO regulator while float-charg- ing the battery. Three charging modes are provided: adapter mode, USB low power mode, and USB high power mode. Battery- capacity-dependent and charging source-dependent current programming are independently programmed. Adapter and USB high power modes can charge up to 1A, with the charging adapter operating either in voltage regulation or in current limit to obtain the lowest possible power dissipation. A single current programming pin is used to program pre-charge, termination, and adapter- mode fast-charge currents in fixed proportions. In the USB modes, a second programming pin is used to program low power pre-charge current and low and high power fast-charge currents. This configuration allows indepen- dent programming of termination current. The two USB modes dynamically limit the charging load if necessary to prevent overloading the USB Vbus supply. Device Load Battery Pack 2.2 μF VADAPTER 2.2 μF MODE SELECT VIN IPUSB IPRGM MODE GND STATB ENB BAT SC811 / SC813 Typical Application Circuit April 7, 2008 |
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