OB3399高精度PWM控制器芯片

2020-2-19 11:15:22 8695 LED芯片

0 　　OB3399高精度离线主面PWM控制器　　一般的描述　　OB3399主面监管离线了　　照明控制器,可以实现精确的领导　　电流。它极大地简化了LED照明　　系统设计通过消除二次侧　　反馈电路。专有的恒压　　(CV)和恒流控制(CC) 　　综合如下图所示。　　LED电流可以调整(CC控制) 　　外部电阻Rs在CS销。　　OB3399提供全面的保护　　和自动恢复功能,包括覆盖　　逐周期限流,VDD夹和　　UVLO。优秀的EMI性能　　在鲜专用频率洗牌　　技术。　　OB3399提供SOT23-6包。　　图1。典型的CC / CV曲线　　特性　　 High Precise Constant Current Regulation 　　通用交流输入　　 Primary-side Sensing 和 Regulation Without 　　TL431和Opto-coupler 　　 Adjustable Constant Current Outpu 　　OB3399高精度离线主面PWM控制器　　一般的描述　　OB3399主面监管离线了　　照明控制器,可以实现精确的领导　　电流。它极大地简化了LED照明　　系统设计通过消除二次侧　　反馈电路。专有的恒压　　(CV)和恒流控制(CC) 　　综合如下图所示。　　LED电流可以调整(CC控制) 　　外部电阻Rs在CS销。　　OB3399提供全面的保护　　和自动恢复功能,包括覆盖　　逐周期限流,VDD夹和　　UVLO。优秀的EMI性能　　在鲜专用频率洗牌　　技术。　　OB3399提供SOT23-6包。　　图1。典型的CC / CV曲线　　特性　　 High Precise Constant Current Regulation 　　通用交流输入　　 Primary-side Sensing 和 Regulation Without 　　TL431和Opto-coupler 　　 Adjustable Constant Current Outpu 深圳市芯美力科技有限公司 OB3399 High Precision Offline Primary-Side PWM Controller GENERAL DESCRIPTION OB3399 is a primary side regulation off-line LED lighting controller which can achieve accurate LED current. It significantly simplifies LED lighting system design by eliminating the secondary side feedback circuitry. Proprietary Constant Voltage (CV) and Constant Current (CC) control is integrated as shown in the figure below. The LED current (CC control) can be adjusted externally by the resistor Rs at CS pin. OB3399 offers comprehensive protection coverage with auto-recovery features including Cycle-by-Cycle current limiting, VDD clamp and UVLO. Excellent EMI performance is achieved with On-Bright proprietary frequency shuffling technique. OB3399 is offered in SOT23-6 package. Fig.1. Typical CC/CV Curve FEATURES  High Precise Constant Current Regulation at Universal AC input  Primary-side Sensing and Regulation Without TL431 and Opto-coupler  Adjustable Constant Current and Output Power Setting  Adjustable Constant Voltage Load Compensation  Built-in Primary Winding Inductance Compensation  Built-in Leading Edge Blanking (LEB)  Cycle-by-Cycle Current Limiting  VDD Under Voltage Lockout with Hysteresis (UVLO)  Latched over temperature protection (OTP)  VDD Clamp APPLICATIONS Low Power AC/DC offline SMPS for  LED applications Shenzhen city core beauty technology co., LTD 0
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