SC806 Miniature High Current Lithium-Ion Battery Charger POWER MANAGEMENT Description Features The SC806 is a fully integrated, single cell, constant-cur- Fully integrated charger with FET pass transistor, rent (cc)/constant-voltage (cv) Lithium-Ion battery charger reverse-blocking diode, sense resistor and thermal in a tiny 3x3 mm thermally enhanced MLP package. The protection SC806 can operate as a stand-alone charger or in con- High Accuracy Charge Current* junction with a Power Management Controller (PMIC). Tiny 3mm x 3mm 10 lead MLP package Programmable precharge, fastcharge and termina- The SC806 has a pre-charge function for trickle charging tion current deeply discharged batteries. The fast charge current is Battery voltage controlled to 1% accuracy enabled automatically when the battery voltage reaches Battery Charge Current accurate to 5% at 800mA the required threshold. When the battery reaches the Soft-start for step load and adapter plug-in constant voltage or CV portion of the charge curve the Up to 1A continuous charge current SC806 switches to CV regulation mode. In this mode Input voltage range from 3V to 6V allows seamless the output current decays until the termination current is charging from current limited adapter reached. At this point the SC806 signals the charge cycle 0.1A battery drain current in shutdown and is complete and turns off the output and enters the moni- tor mode. If the battery voltage drops by 100mV from monitor modes the CV voltage a new charge cycle will begin. Over current protection in all charging modes Automatic loss of battery detection The SC806 can also function as a general purpose cur- Adapter Present, Charge Status, and No Battery rent source or as a current source for charging Nickel- output LED drivers Cadmium (NiCd) and Nickel-Metal-Hydride (NiMH) batter- ies. *Patent Pending Applications Cellular phones PDAs Handheld meters Charging stations USB chargers Digital cameras GPS Handhelds Programmable current source Typical Application Circuit SC806 Typical Application Circuit NTC Voltage SC806 3 1 CHARGER VIN VCC VOUT 10 9 CHRGB NTC 2 5 CPB ITERM D2 8 4 NOBAT IPRGM C1 D1 7 6 BATTERY DIS GND .1uF LED LED R4 3.01k R3 C2 NOBAT Indicator R2 R1 3.01k 1k Adapter 2.2uF 1k Present Indicator Charging Indicator August 10, 2005 1 www.semtech.comSC806 POWER MANAGEMENT Absolute Maximum Ratings Exceeding the specifications below may result in permanent damage to the device or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied. Plarameter SmymboMsaximu Unit VCC, CPB, CHRGB, NTC, DIS to GND -V0.3 to 7.0 VOUT, NOBAT, IPRGM, ITERM to GND -V0.3 to +6.0 Power Dissipation M)LP (Derate 20mW/Cadbove 85C P2 W Thermal Impedance, Junction to Case 5W0* C/ JA Jxunction Temperature T0jma 1C5 OTperating Ambient Temperature Range -C40 to +85 A PTeak IR Reflow temperature, soldering 20s-40s 2C60 LEAD STtorage Temperature Range -C65 to 150 STG VOUT short to GND CAontinuous VOUT Output Current 1A *Calculated from package in still air, mounted to 3 x 4.5, 4 layer FR4 PCP with thermal vias under the exposed pad per JESD51 standards. Electrical Characteristics Unless otherwise noted: VCC = 4.75V - 5.25V. o Plarameter SsymboC5ondition 2CT A o (-40Csto +85C) Unit MpinTxy MnaMxi Ma ICnput VoltageV5C 33.15 6V. Shutdown Mode ICC 8050 400 1A20 DIS DIS = 5V Operating Current Charging Mode, CPB, ICC CHRGB, ITERM, 18.2 05. 2A.2 m CHG IPRGM = 0 A Bkattery Leakage Current Ilea V1CC = 0V 01. A BAT R*egulated VoltageV2BAT* 46. 44.1 4V.2 BQattery Pre-Charge Current IPRE 550 455 ITERM Resistor R = 3.01k mA Battery Termination Current I0TERMQ 55455 IFastQ IPRGM = 15k 100 91.5 111.5 mA 1 Battery Fast-Charge Current IPRGM = 1.87k IFastQ VBATTERY = 3.8V 787 -5 +5 % 2 Battery Fast-Charge 2.8V < VBATTERY < VBAT 1A.0*** Current Limit Dropout Voltage = 1V 2004 Semtech Corp. 2 www.semtech.com