LN2535是一款高性能、全电压 85VAC-265VAC输入的离线式 PSR（初级调整）AC/DC 转换
控制器，适用于充电器和适配器等。该此芯片基于反激式 DCM 工作模式，在使用较少外部元器件时
可满足大多数的工业能效标准（CEC，European Blue Angel和 US Energy Star标准） 。
LN2535为了确保芯片能够安全工作，内部集成了输出短路保护电路、输出过压保护电路、欠压
保护电路和过温保护电路。
LN2535 可优化应用方案成本，基于原边反馈的结构无需外部光耦及外部基准（如 TL431）便
可实现恒压恒流输出。该芯片内部集成了补偿电路使得在外部输入电压或电感有误差变化时仍可提供
恒流输出，芯片内部也集成了输出线损补偿电路以维持输出电压的稳定，在能实现较好调整度的情况
下可实现待机功耗小 150mW。
■ 产品特点
? 初级调整技术
? 免光耦
? 高精度恒流恒压输出
? 外部元件少
? 集成输入电压变化补偿电路
? 集成变压器电感变化补偿电路
? 集成输出线损补偿电路
? 输入欠压保护、输入过压保护
? 输出短路保护、输出过压保护
? 过温保护
? 反激式 DCM工作模式
? 待机功耗低于 150mW
? SOT23-5封装
■ 用途
? 手机、PDAs、MP3及其它便携设备的充
电器/适配器
? LED驱动器
? 待机及辅助电源
■ product overview
LN2535 is a high-performance, full voltage 85 vac - 265 vac input of an off-line PSR (primary) AC/DC conversion
Controller, and is suitable for the charger and adapter, etc.The chip is based on DCM flyback type working mode, when using fewer external components
Can meet most of the industrial Energy efficiency standard (CEC, European Blue Angel and US Energy Star standards).
LN2535 in order to ensure the security of the chip can work, internal integration the output short circuit protection circuit, output overvoltage, undervoltage protection circuit
Protection circuit and thermal protection circuit.
LN2535 can optimize the cost of application solutions, based on the original edge feedback structure without the external light coupling and external benchmark (e.g., TL431)
Which can realize constant pressure constant current output.The compensation of the chip internal integration circuit makes the external input voltage or inductance is error changes can still be provided
Constant current output, chip internal also integrates the output line loss compensation circuit in order to maintain the stability of output voltage, in can achieve better adjustment degree
Small 150 mw under standby power consumption can be realized.
■ product characteristic
?Primary adjustment technology
?Avoid light coupling
?High precision constant current constant voltage output
?External components less
?Integration of the input voltage change compensation circuit
?Integrated transformer inductance change compensation circuit
?Integrated output line loss compensation circuit
?Input under-voltage protection, over voltage protection
?Output short circuit protection and output over-voltage protection
?Over temperature protection
?DCM flyback type working mode
?Standby power consumption is less than 150 mw
?SOT23-5 encapsulation
■ purpose
?Mobile phones, PDAs, MP3 players and other portable devices to charge
Electrical/adapter
?The LED driver
?Standby and auxiliary power supply
11. When off work with 25 (including A current
12.2.9 V trickle charging threshold voltage
13. Soft start current limiting surge current
14. Output has the counter-attack filling and protection function
