ISL6294A中文资料High Input Voltage Charger数据手册Renesas规格书

描述 Description

Support is limited to customers who have already adopted these products.

The ISL6294A is a cost-effective, fully integrated high input voltage single-cell Li-ion battery charger. The charger uses a CC/CV charge profile required by Li-ion batteries. The charger accepts an input voltage up to 28V but is disabled when the input voltage exceeds the OVP threshold, typically 7. 3V, to prevent excessive power dissipation. The 28V rating eliminates the overvoltage protection circuit required in a low input voltage charger. The charge current and the end-of-charge (EOC) current are programmable with external resistors. When the battery voltage is lower than typically 2. 55V, the charger preconditions the battery with typically 20% of the programmed charge current. When the charge current reduces to the programmable EOC current level during the CV charge phase, an EOC indication is provided by the CHG pin, which is an open-drain output. An internal thermal foldback function protects the charger from any thermal failure. Two indication pins (PPR and CHG) allow simple interface to a microprocessor or LEDs. When no adapter is attached or when disabled, the charger draws less than 1µA leakage current from the battery.

特性 Features

• Complete Charger for Single-Cell Li-ion/Polymer Batteries
• No External Blocking Diode Required
• 1% Voltage Accuracy
• Programmable End-of-Charge Current
• Trickle Charge for Fully Discharged Batteries
• Power Presence and Charge Indications
• Ambient Temperature Range: -40°C to +85°C
• Pb-Free (RoHS Compliant)

应用 Application

• Mobile Phones
• PDAs
• Stand-Alone Chargers
• Other Handheld Devices