由 170V 至 270V 交流电压供电的 16V 至 32V@2A 双元件铅酸电池充电器参考设计

iczoom188

　　描述

　　采用准谐振隔离型反激式设计，从高压线电源为两个铅酸电池元件充电。该转换器可接受两个外部信号(称为次级侧)以提供基准电压，从而可设置输出电压和电流。由于具有谷底开关调制功能，转换器展示出良好的宽范围效率。

　　特性

　　由于具有谷底开关，该隔离型反激式转换器可实现低成本、低 EMI

　　紧凑型解决方案(小型封装：仅 60mm x 60mm)在 0.1A 至 2A 的范围内以近乎平稳的效率 (78%...89%) 提供最大 64W 的功率

采用耗尽模式启动 FET，可进一步降低待机损耗

　主控器件

器件型号 名称

LM2904  双路通用运算放大器  

LM5023  AC-DC 准谐振电流模式 PWM 控制器  

LMP8480  具有电压输出的 LMP8480/LMP8481 精确 76V 高侧电流感应放大器  

TL431A  精度为 1% 的可调精密并联稳压器  　

　　The TL431 and TL432 devices are three-terminal adjustable shunt regulators, with specified thermal stability over applicable automotive, commercial, and military temperature ranges. The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V, with two external resistors. These devices have a typical output impedance of 0.2 Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications, such as onboard regulation, adjustable power supplies, and switching power supplies. The TL432 device has exactly the same functionality and electrical specifications as the TL431 device, but has different pinouts for the DBV, DBZ, and PK packages.

　　Both the TL431 and TL432 devices are offered in three grades, with initial tolerances (at 25°C) of 0.5%, 1%, and 2%, for the B, A, and standard grade, respectively. In addition, low output drift versus temperature ensures good stability over the entire temperature range.

　　The TL43xxC devices are characterized for operation from 0°C to 70°C, the TL43xxI devices are characterized for operation from –40°C to 85°C, and the TL43xxQ devices are characterized for operation from –40°C to 125°C.

　　特性

　　Reference Voltage Tolerance at 25°C

　　0.5% (B Grade)

　　1% (A Grade)

　　2% (Standard Grade)

　　Adjustable Output Voltage: Vref to 36 V

　　Operation From −40°C to 125°C

　　Typical Temperature Drift (TL431B)

　　6 mV (C Temp)

　　14 mV (I Temp, Q Temp)

　　Low Output Noise

　　0.2-Ω Typical Output Impedance

　　Sink-Current Capability: 1 mA to 100 mA

　　All trademarks are the property of their respective owners.

　 Iczoom拍明芯城（www.iczoom.com）聚焦于中小企业需求，具有货源可靠、品类齐全、交付及时、价格实惠、方案众多的特点和服务优势，客户来源非常丰富，原厂、代理商、正品经销商、同行电商、终端商均有注册。 Iczoom拍明芯城严格把控卖家资质和货品质量，快速匹配买卖信息，帮助客户“卖得快、买得全”。同时，Iczoom拍明芯城为中小企业提供专业的管理软件和全程供应链服务，让客户轻松实现内部的数据化管理。