SUMMIT Microelectronics: Product Summary: SMB339: Programmable Switch-mode, Li+ Battery Charger with TurboCharge™ Mode, USB “On-the-Go” Power, USB Power Source Detection and Automatic Input Current Limiting

THIS PRODUCT IS NOT RECOMMENDED FOR NEW DESIGNS
Recommended Pin-for-pin and functional replacement: SMB329B

SUMMIT Microelectronics: Product Summary: SMB339

Preliminary Information

A complete index to all Product Summary pages

Download/view the SMB339 one page data sheet. Please contact your Summit Sales Representative for a full datasheet.

Download/view the SMB339 Fact Sheet

Please contact your Summit Sales Representive for the GUI Programming Software

Read our press release regarding this product.

Changing Charges for New Battery Technologies, Electronic Product News (EPN), July 23, 2009
by George Paparrizos, Director of Marketing, Summit Microelectronics, Inc.

Enabling universal battery charging and compliance, Electronic Products , March 2009

Universal charging solves the matching problem — Summit Microelectronics, EPN, January 2009

Programmable Battery Charger, Electronic Products, October 2008

Summit Microelectronics Unveils SMB339 Programmable Battery Charger IC, EDA Geek, October 2008

Universal USB battery charger adapts to any power source, Electronic Products, October 2008

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APPLICATIONS
	2.5G/3G/GSM/CDMA Phones
	Smartphones/PDAs
	Portable Media Players
	Portable GPS Terminals
	Handheld Game Consoles

SMB339 SYSTEN APPLICATIONS: Summit Microelectronics, Inc.

SMB339 SYSTEM APPLICATION

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SMB339: Programmable Switch-mode, Li+ Battery Charger with TurboCharge™ Mode, USB “On-the-Go” Power, USB Power Source Detection and Automatic Input Current Limiting

FEATURES
	Automatic input current limit*
	Optional automatic power source detection per latest USB charging specification 1.0
	USB or AC input with programmable input current limiting
	Up to 1.25A continuous charging current from AC adapter
	Up to 750mA charging current from 500mA USB port using automatic TurboCharge™ mode*
	+4.35 to +6.2V input range (+18V input protected)
	USB “On-the-Go” Power support for USB OTG enabled devices (+5V reverse output @ 500mA)
	50mA SYSON output for “dead battery” boot-up (SMB329)
	Analog output voltage for direct charge current measurement
	Reverse current blocking
	High-efficiency 3MHz current-mode step-down regulator
	Integrated frequency compensation and power MOSFETs
	High-accuracy float voltage regulation: 1%
	Pre-charge and complete-charge safety timers
	Battery pack thermal monitor
	Digital programming of all major parameters via I2C interface (One-time programmable for default, non-volatile settings)
	- Fast charge voltage threshold, float voltage - Pre-charge, fast charge, termination current
	Status register monitors and flags charger operation
	- Charge in-progress/termination - Charge timer fault - Over-current limiting - UV/OV detection/shutdown
	1.95mm x 2.22mm CSP-20 package (0.4mm pitch lead-free)

INTRODUCTION

The SMB329 and SMB339 are programmable single-cell lithium-ion/lithiumpolymer battery chargers designed for a variety of portable applications. The devices provide a simple and efficient way to charge high-capacity LiIon batteries via a USB or AC adapter input. Furthermore, the SMB329 and SMB339 are able to automatically adjust input current level by detecting the AC/DC adapter’s maximum stable output currematching wall adapter to electronic device.

Unlike conventional devices, the SMB329’s and SMB339’s high-efficiency, switch-mode operation eliminates the thermal problems of conventional linear solutions. Also the buck converter architecture effectively multiplies the input current to increase charge rate for the Li+ cell and uses current limited supplies like USB more efficiently. A 50mA SYSON switch output provides a bypass power supply to boot the system for “instant on” without waiting for charging in case of a dead battery (SMB329 only). Both products also support USB On-the-Go devices by providing the required USB-OTG +5V power supply using the Li-Ion battery as a source.

The SMB329 and SMB339 can switch between USB mode and AC Adapter mode and work seamlessly in conjunction with a USB controller. Furthermore, they offer the option to automatically differentiate an AC/DC wall adapter from a USB2.0 hub via the D+/D- USB lines, making them compatible with USB battery charging specification 1.0.

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