JTM1221 Controller for Adaptive 100/120Hz Current Ripple Removing Circuit, It is considered that LED is shorted when the cathode voltage of LED is higher than short connecting threshold and remains

                          目录tB3嘉泰姆

   1.产品概述      2.产品特点      3.应用范围     4.技术规格书下载（PDF文档）</span>tB3嘉泰姆

   5.产品封装      6.电路原理图</strong>     7.相关产品tB3嘉泰姆

一.产品概述tB3嘉泰姆

  JTM1221 is a controller for driving external NMOSFET to remove the 100/120Hz LED current ripple on AC/DC power by a capacitor between VC and GND.tB3嘉泰姆

        The adaptive technology of JTM1221 ensures removing LED current ripple.tB3嘉泰姆

       JTM1221 clamps the input voltage on VIN pin by 30V. Only one resistor is needed when the output voltage of AC/DC power is higher than 31V.tB3嘉泰姆

     JTM1221 allows user to setup maximum LED current by the sensing resistor between the source of NMOSFET and ground, which protects  NMOSFET from being damaged when LED short connected or hot-plug.tB3嘉泰姆

     By sensing the drain voltage of NMOSFET via a  resistor between the drain and VLMT  pin,JTM1221 allows user to setup the maximum cathode voltage of LED string, which could help limit the power dissipation on chip.tB3嘉泰姆

      It is considered that LED is shorted  when the cathode voltage of LED is higher than short connecting threshold and remains over 60us JTM1221 shuts down NMOSFET when LED is shorted and recovers after 13ms.tB3嘉泰姆

     JTM1221 provides over thermal protection. When the temperature of JTM1221 exceed 135 , OTP is trigged. JTM1221 shuts down NMOSFET until the temperature decrease to 110tB3嘉泰姆

二.产品特点tB3嘉泰姆

Controller for adaptive 100/120Hz current ripple removertB3嘉泰姆

Built-in zener diode for input voltage clampingtB3嘉泰姆

VG output voltage high to 10VtB3嘉泰姆

Parameters Subject to Change Without NoticetB3嘉泰姆

Programmable amplitude of LED current rippletB3嘉泰姆

Programmable maximum cathode voltage of LEDtB3嘉泰姆

Programmable maximum LED current tB3嘉泰姆

Short protectiontB3嘉泰姆

Over temperature protectiontB3嘉泰姆

SOT23-6 PackagetB3嘉泰姆

三.应用范围tB3嘉泰姆

   LED lighting tB3嘉泰姆

四.技术规格书（产品PDF)tB3嘉泰姆

需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持</span>！</span>tB3嘉泰姆

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五.产品封装图</span>tB3嘉泰姆

  tB3嘉泰姆

六.电路原理图</strong>tB3嘉泰姆

   tB3嘉泰姆

七.相关芯片选择指南tB3嘉泰姆

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