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ZLED7015 Scheda tecnica(PDF) 1 Page - Renesas Technology Corp |
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ZLED7015 Scheda tecnica(HTML) 1 Page - Renesas Technology Corp |
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1 / 23 page  1.0MHz Boost Converter with Internal 35V Switch ZLED7015 Datasheet © 2016 Integrated Device Technology, Inc. 1 April 20, 2016 EN LX ZLED7015 LED String VIN = 6 to 30 VDC COUT R1 L1 CIN D1 FB PGND AGND OVP R2 RS VP VDD C1 CVDD CVP C2 RVDD REN COVP VOUT Brief Description The ZLED7015, one of our ZLED family of LED control ICs, is a constant current boost converter with an internal high-power 35V switch. It is opti- mal for driving multiple white LEDs connected in series so that the LED current is uniform for better brightness and color control. It can also drive devices that require a constant voltage and is capable of operating efficiently with voltage supplies ranging from 6VDC to 30VDC. It is ideal for diverse lighting applications requiring low sup- ply voltages such as SELV applications. Typically, smaller, less expensive external components can be used since the ZLED7015 switches at 1 .0MHz (typical). The ZLED7015 output current is adjustable via an external current sense resistor RS connected from the FB pin to ground. The ZLED7015 improves efficiency and minimizes power losses in the current setting resistor RS by use of an internal 0.3V feedback reference vol- tage. Dimming can be controlled using a pulse-width modulation (PWM) waveform or a DC voltage applied to the FB pin. The ZLED7015 provides a “soft-start” function to prevent excessive in-rush current on start-up and ensures a controlled rise of the output voltage. Over-voltage protection is adjustable via external resistors R1 and R2. ZLED7015 Typical Application Circuit Features • Integrated 35V power switch • Wide input range: 6VDC to 30VDC • Over-temperature protection • Over-voltage (open LED string) protection adjusted via external resistor divider • Under-voltage lockout ensures reliable circuit operation • Control of output current during start-up via internal “soft-start” • Switching frequency: 1.0MHz • Single pin on/off or brightness control via PWM, microcontroller, or DC voltage control signal input • MSOP-10 package Benefits • High efficiency: up to 95% efficiency • Few small, low-profile components needed for operation • Small form-factor package Available Support • Evaluation Kit Physical Characteristics • Operating temperature: -40°C to 85°C • RoHS-compliant |
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