INTRODUCTION

The SMB137C is a programmable single-cell lithiumion/lithium-polymer battery charger designed for a variety of portable applications. Unlike conventional charging devices, the SMB137C’s high-efficiency switch-mode operation eliminates the low charge current and thermal problems of conventional linear solutions. In addition, the switching architecture in conjunction with programmability enables dramatically faster charging – TurboCharge™ mode - from current limited inputs such as USB.

FEATURES

• Automatic Input Current Limit for universal USB/AC/DC adapter compatibility*

• Optional automatic power source detection per latest USB charging specification 1.2

• USB or AC input with automatic input selection and programmable input current limiting (USB2.0 compliant)

• Up to 750mA charging output from 500mA USB port or 1500mA from AC adapter using proprietary “TurboChargeTM Mode”

• Input/output CurrentPath™ control allows system operation with deeply discharged/missing battery – no start-up delay

• “Low Battery Recovery” mode for >500mA startup from 100mA USB port with deeply discharged cells – no start-up delay*

• USB OTG, HDMI, MHL power support (up to 500mA @ +5V)

• Hardware programmable support for JEITA

• High-efficiency step-down regulator with 3MHz switching

• +4.35 to +6.0V input voltage range

• +18V input tolerance (non-operating)

• High-accuracy float voltage regulation: 1.0%

• Digital programming of major parameters via I2C interface*

• Comprehensive protection features

• Tiny CSP-30 package

APPLICATIONS

• Smartphones

• Tablet PCs

• Portable Media Players

• Perfect Companion for MSM Chipsets