{"id":17623,"date":"2025-04-15T18:37:37","date_gmt":"2025-04-15T10:37:37","guid":{"rendered":"https:\/\/www.ecmos.com.tw\/?p=17623"},"modified":"2025-04-15T18:39:30","modified_gmt":"2025-04-15T10:39:30","slug":"ec4304-1a-hysteretic-high-brightness-led-driver-with-internal-switch","status":"publish","type":"post","link":"https:\/\/www.ecmos.com.tw\/en\/led-driver\/ec4304-1a-hysteretic-high-brightness-led-driver-with-internal-switch\/","title":{"rendered":"EC4304\uff5c1A, Hysteretic, High Brightness LED Driver with Internal Switch"},"content":{"rendered":"\n
\u898f\u683c\u66f8\u4e0b\u8f09<\/div><\/a>\n\n\n\n
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General Description<\/h3>\n\n\n\n

The EC4304 is a high-efficiency continuous mode inductive step-down converter which drives N-channel MOSFET and it is designed for driving single or multiple series connected LEDs from a voltage source higher than the LED voltage.<\/p>\n\n\n\n

It operates from input supply between 7V and 40V and provides and externally adjustable output current to 1A which is depending on supply voltage and external components.<\/p>\n\n\n\n

This EC4304 includes the output switch and high-side output current sensing circuit, which uses an external resistor to set the output current.<\/p>\n\n\n\n

The ADJ pin will accept either a DC voltage or a PWM waveform. This will provide either a continuous or gated output current depending upon the control frequency.<\/p>\n\n\n\n

The PWM filter components contains a soft-start rising time setting. The soft-start time can be increased by using an external capacitor from the ADJ pin to ground. Applying a 0.2V or lower to the ADJ pin turns the output off and switches the device into a low current standby state.<\/p>\n\n\n\n

Features<\/h3>\n\n\n\n
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  • Operates from 7V to 40V Supply Voltage<\/li>\n\n\n\n
  • Internal 40V NDMOS Switch<\/li>\n\n\n\n
  • Output Current 1A<\/li>\n\n\n\n
  • Single Pin On\/Off and Brightness Control Using DC Voltage or PWM<\/li>\n\n\n\n
  • EC4304 to 95% Efficiency<\/li>\n\n\n\n
  • Typical +\/-5% LED Current Accuracy<\/li>\n\n\n\n
  • Input Under Voltage Lockout<\/li>\n\n\n\n
  • SOT23-5L\u3001DFN 3×3 8L\u3001SOT89-5L Package<\/li>\n\n\n\n
  • RoHS Compliant and Halogen-Free<\/li>\n<\/ul>\n\n\n\n

    Application<\/strong><\/h3>\n\n\n\n
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    • Automotive LED Lighting<\/li>\n\n\n\n
    • High Power LED Lighting<\/li>\n\n\n\n
    • Indicator and Emergency Lighting<\/li>\n\n\n\n
    • Architectural Lighting<\/li>\n\n\n\n
    • Low Voltage Industrial Lighting<\/li>\n\n\n\n
    • Signage and Decorative LED Lighting<\/li>\n<\/ul>\n\n\n\n
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