原标题：Linear LTMR8062 32V 2A电池充电解决方案

　　Linear公司的LTMR8062是完整的32V 2AμModuleR电池充电器,提供恒流/恒压充电特性,最大充电电流2A,输入电压从4.95V 到32V,最大到40V,主要应用在手持仪表,12V-24V汽车和台式计算器充电器以及太阳能电池充电.本文介绍了LTMR8062主要特性,方框图,以及多种应用电路, 32V 2A LTMR8062EV演示板电路图和材料清单(BOM).

　　The LTMR8062 is a complete 32VIN, 2A μModuleR power tracking battery charger. The LTM8062 provides a constant- current/constant-voltage charge characteristic, a 2A maximum charge current, and employs a 3.3V float voltage feedback reference, so any desired battery float voltage up to 14.4V can be programmed with a resistor divider.

　　The LTM8062 employs an input voltage regulation loop, which reduces charge current if the input voltage falls below a programmed level, set with a resistor divider. When the LTM8062 is powered by a solar panel, this input regulation loop is used to maintain the panel at peak output power.

　　The LTM8062 also features preconditioning trickle charge, bad battery detection, a choice of termination schemes and automatic restart.

　　The LTM8062 is packaged in a thermally enhanced, compact (9mmx15mmx4.32mm) over-molded land grid array (LGA) package suitable for automated assembly by standard surface mount equipment. The LTM8062 is RoHS compliant.

　　LTMR8062主要特性：

　　Complete Battery Charger System

　　Input Supply Voltage Regulation Loop for Peak Power Tracking in MPPT (Maximum Peak Power Tracking) Solar Applications

　　Wide Input Voltage Range: 4.95V to 32V (40V Abs Max)

　　2A Charge Current

　　Resistor Programmable Float Voltage Up to 14.4V Accommodates Li-Ion/Polymer, LiFePO4, SLA

　　Integrated Input Reverse Voltage Protection

　　User Selectable Termination: C/10 or Termination Timer

　　0.75% Float Voltage Reference Accuracy

　　9mmx15mmx4.32mm LGA Package

　　LTMR8062应用：

　　Industrial Handheld Instruments

　　12V to 24V Automotive and Heavy Equipment

　　Desktop Cradle Chargers

　　Solar Power Battery Charging

　　图1. LTMR8062方框图

　　图2. LTMR8062应用电路图(1):2A 2节LiFePO4电池充电器

　　图3. LTMR8062应用电路图(2):带8.4V锂离子电池组的2A 太阳能电源管理器

　　图4. LTMR8062应用电路图(3):2A LiFePO4 uModule电池充电器

　　32V 2A LTMR8062EV演示板

　　Demonstration circuit 1621A features the LTMR8062, a 32V, 2A μModuleR power tracking battery charger. The demonstration circuit is designed to operate from a 9.75V to 32V input source, and to charge a 2-cell battery pack to a fl oat voltage of 7.2V. The fl oat voltage can easily be changed to a higher or lower voltage by adjusting the values of R2 and R3. R7 and R9 keep the converter off until the input has reached 8.5V, typically. JP2 allows for easy selection of C/10 or timer charge termination. The LTM8062 data sheet must be read in conjunction with this quick start guide for working on or modifying the demo circuit 1621A.

　　图5.32V 2A LTMR8062EV演示板外形图

　　图6. 32V 2A LTMR8062EV演示板电路图

　　32V 2A LTMR8062EV演示板材料清单(BOM):