What kind of charger are you using? Semtech SC820 Family The industry's first 30V single/dual input Li-ion chargers in 2x2mm. Semtech SC820 Family Part Inputs Protection OVP Max Modes Package SC810 Single 30V 9.6V One MLPD-6 2x2mm Key Features: SC811 Single 30V 9.6V • 30V Input Protection with 6V or 9.6V OVP • Single/Dual Input Versions for AC Adapters and USB • Programmable Charge Currents up to 1A • Thermal Limiting Prevents Overheating • Tiny and Thin 2 x 2 x 0.6mm MLPD Package • Complies with CCSA YD/T 1591-2006 SC813 Single 30V 6.0V SC820 Dual 30V & 30V 9.6V Applications: • MP3/4 Portable Media Players • GPS Personal Navigation Devices • Cellular, Cordless, WiFi/VoIP Phones • DSCs, Picture Frames, and Headsets protected to 30V Adapter or USB VIN VOUT 0 82 4.2V Adapter V_AD VOUT 2.2u SC811/13 1 = USB hi hi-z = USB low 0 = Adapter MLPD-8 2x2mm GND 2.2u 2.2u SC820 ENB MODE Enable ENB IPRGM STATB 4.2V 2.2u GND Enable MLPD-8 2x2mm V_USB USB 2.2u IPUSB SC Adapter USB High USB Low Adapter USB MLPD-8 2x2mm protected to 30V IPRGM To download SC8xx datasheets: www.semtech.com/eetcnp608 Adapter USB High USB Low IPUSB STATB