ob3394/ ob3396 离线高精度初级侧pwm电源开关的详细描述： ob3394/ob3396 highprecision off-line primary-side pwm power switchob3394 is a primaryside regulation off-line led lighting controller which can achieveaccurate led current. it significantly simplifies led lightingsystem design by eliminating the secondary side feedback circuitry.features: ◆ high precise constant current regulation at universalac input ◆ primary-side sensing and regulation without tl431 andopto-coupler ◆ programmable cc regulation ◆ adjustable constantcurrent and output power setting◆ built-in secondary constantcurrent control with primary side feedback◆ built-in adaptivecurrent peak regulation◆ built-in primary winding inductancecompensation◆ power on soft-start◆ cycle-by-cycle current limiting◆ built-in leading edge blanking (leb) ◆ vdd under voltage lockoutwith hysteresis (uvlo) ◆ vdd ovp ◆ vdd clamp ◆ available in dip8packages, rohs compliant applications: low power ac/dc offline smpsfor◆ led applicationsob3394/ ob3396离线高精度初级侧pwm电源开关ob3394是一个初级端调节离线led照明控制器，可以实现准确的led电流。显著简化了led照明系统设计，消除次级侧反馈电路。产品特点：◆高精度恒流调节在通用ac输入◆原边感应和调节，而无需tl431和光电耦合器◆cc条例可编程◆可调恒流输出电源设置◆内置的二次恒定电流控制与初级反馈◆内置的自适应电流调峰◆内置原边绕组电感补偿◆电源软启动◆逐周期电流限制◆内置前沿消隐（leb）◆vdd与滞后欠压锁定（uvlo）◆vddovp◆vdd钳◆可提供dip8封装，符合rohs标准应用范围：低功率ac/ dc离线smps◆led应用

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深圳市华创威国际货运代理有限公司
胡雪丽
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