LY6294ETB

This chip is a fully integrated power management IC designed for Bluetooth charging cases, integrating lithium battery charge management, a synchronous boost converter, battery fuel gauge, and protection function modules. It supports Hall sensor direct drive of the enable pin, enabling automatic earphone reconnection on lid open, LED illumination for 8 seconds on lid open, and automatic boost activation on lid close — eliminating the need for external MOSFETs, transistors, and other output loop control circuits. It also supports MCU control of the enable pin for fast output turn-on and turn-off, enabling communication between the charging case and earphones without external control MOSFETs or current discharge MOSFETs. An integrated NTC temperature protection function allows a single NTC resistor to monitor lithium battery temperature during both charging and discharging states.

Applications

• Bluetooth earphone charging case
• Portable lithium battery applications

Key features

• Hall sensor or MCU direct-drive control
• Hall-enabled lid-open illumination for 8s, auto boost activation on lid close
• Negative temperature coefficient (NTC) support
• Light-load auto-shutdown current: 7mA
• Standby voltage: selectable battery voltage or 2V
• Standby current: 4μA
• Charging current: 0.2A / 0.3A / 0.4A / 0.9A
• Maximum discharge current: 1A
• Output overvoltage, short-circuit, and overcurrent protection
• Intelligent temperature control
• 1/2 LED battery level indication
• Boost efficiency up to 93%
• ESOP8 package