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

Product Attributes

Introduction

The PSC5415 combines a highly integrated switch-mode charger, to minimize single-cell Lithium-ion (Li-ion) charging time from a USB power source, and a boost regulator to power a USB peripheral from the battery. The charging parameters and operating modes are programmable through an I²C interface that operates up to 3.4Mbps. The charger and boost regulator circuits switch at 1.5MHz to minimize the size of external passive components. The PSC5415 provides battery charging in three phases: conditioning, constant current, and constant voltage. To ensure USB compliance and minimize charging time, the input current is limited to the value set through the I²C host. Charge termination is determined by % of the setting current. The integrated circuit (IC) automatically restarts the charge cycle when the battery falls below an internal threshold. If the input source is removed, the IC enters a high-impedance mode with leakage from the battery to the input prevented. Charge status is reported back to the host through the I²C port. Charge current is reduced when the die temperature reaches 120°C. The PSC5415 can operate as a boost regulator on command from the system. The boost regulator includes a soft-start that limits inrush current from the battery. The PSC5415 is available in a 2.0×1.7mm, 20-bump, 0.4mm pitch WLCSP package.

Features

• Fully Integrated, High-Efficiency Charger for Single-Cell Li-lon and Li-Polymer Battery Packs
• Faster Charging than Linear
• Charge Voltage Accuracy: ±1% 25°C ±7.5%
• Charge Current Regulation Accuracy
• 20V Absolute Maximum Input Voltage
• 6V Maximum Input Operating Voltage
• 1.5A Maximum Charge Rate
• Programmable through High-Speed I2C Interface (3.4Mb/s) with Fast Mode Plus Compatibility
• Input Current
• Fast-Charge/Termination Current
• Charger Voltage
• Termination Enable
• 1.5MHz Synchronous Buck PWM Controller with Wide Duty Cycle Range
• Small Footprint 2.2μH External Inductor
• Weak Input Sources Accommodated by Reducing Charging Current to Maintain Minimum VBUS Voltage
• Low Reverse Leakage to Prevent Battery Drain to VBUS
• 5V, 500mA Boost Mode for USB OTG for 2.7 to 4.5V Battery Input

Applications

• Cellular Phones, Smart Phones, PDAs
• Tablet, Portable Media Players
• Gaming Device, Digital Cameras