SMB135v21SMB135 Preliminary Datasheet Programmable Switch-mode, USB/AC Input Li+ Battery Charger with TurboCharge Mode* FEATURES & APPLICATIONS Programmable USB/AC Li-Ion battery charger TurboChargeTM Mode: 750mA output from 500mA USB High-efficiency current-mode PWM controller o o 750kHz to 1.25MHz switching frequency 0% to 100% duty-cycle INTRODUCTION The SMB135 is a programmable single-cell lithium-ion/lithium-polymer battery charger for a variety of portable applications. The device provides a simple and efficient way to charge high-capacity Li-Ion batteries via a USB port or an AC adapter. Unlike conventional devices, the SMB135’s high-efficiency operation eliminates large internal temperature rise and localized hot spot in handheld equipment. TM Summit’s proprietary TurboCharge mode ……