SC820EVB(2008) Datasheet - Semtech Corporation

Description

   The SC820 is a dual input (adapter/USB) linear single-cell Li-ion battery charger in an 8 lead 2x2 MLPD ultra-thin package. Both inputs will survive sustained input voltage up to 30V to protect against hot plug overshoot and faulty charging adapters.

Features

◾ Dual input charger automatically selects adapter

   input over USB

◾ Constant voltage — 4.2V, 1% regulation

◾ Fast-charge current regulation — 15% at 70mA,

   9% at 700mA

◾ Three mode charging (current regulation, voltage

   regulation, thermal limiting)

◾ Input voltage protection — 30V

◾ Current-limited adapter charging support — reduces

   power dissipation in charger

◾ USB input limits charge current to prevent Vbus

   overload

◾ Instantaneous CC-to-CV transition for faster charging

◾ Programmable battery-dependent currents 

   (adapter-sourced fast-charge & pre-charge, termination)

◾ Programmable source-limited currents (USB-sourced

   fast-charge & pre-charge)

◾ 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 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