مدار مجتمع (آی سی) آی‌سی مدیریت توان (پی‌ام‌آی‌سی) مدیریت باتری (بی‌ام‌اس)

Product Attributes

Introduction

QK1201 is a dedicated IC for low-voltage LED lights, featuring complete charging functionality and comprehensive battery protection, with compatibility for both touch control and push-button switch operation. QK1201 provides LED short-circuit protection and a power-saving mode with a static standby current of less than 20uA. QK1201 offers comprehensive battery protection, including overcurrent, overvoltage, constant current, constant voltage, and temperature protection. When the lithium battery charging voltage is below 2.7V, trickle charging is applied to prevent battery damage. Once the battery voltage exceeds 2.7V, high-current constant-current charging begins. As the voltage approaches 4.2V, the charging current gradually decreases; when it falls below a certain threshold, QK1201 terminates the charging process. The charging voltage detection error can achieve ±1%. QK1201 also features reverse-polarity protection for both the charging power supply and the battery. When either the battery or the charging source is connected in reverse, the IC does not generate excessive current, protecting it from damage. QK1201 incorporates touch detection functionality, which replaces traditional buttons with variable-area touch keys, reducing the number of peripheral components required.

Features

• Low quiescent standby current
• Output LED short-circuit protection
• Under-voltage protection
• Over-temperature protection
• Direct single-cell Li-ion battery charging from USB port
• 4.2V preset charge voltage with ±1% accuracy
• Comprehensive LED status indication
• Automatic recharge
• 2.7V trickle charging
• Touch detection, ESOP-8 package

Applications

• Portable lanterns
• Flashlights
• Emergency lights
• Desk lamps
• Vanity mirrors