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ZLED7320 Datasheet(PDF) 1 Page - Integrated Device Technology |
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ZLED7320 Datasheet(HTML) 1 Page - Integrated Device Technology |
1 / 27 page High Current 40V LED Driver with Internal Switch ZLED7x20 Datasheet © 2016 Integrated Device Technology, Inc. 1 April 20, 2016 Vin I SENSE LX GND ZLED7x20 D1 LED String Vs = 6 to 40 VDC (C3) Rs L1 (C1) C2 0.1µF ADJ 33µH to 220µH Brief Description The ZLED7x20 continuous-mode inductive step- down converter family is part of our line of LED- control ICs. It is designed for applications requiring high brightness and high current. It can efficiently drive a single LED or multiple series-connected LEDs from a voltage input higher than the LED for- ward voltage: Vin = 6 to 40 VDC. It provides an adjustable output current ≤1.2A, which is set via an external resistor and controlled by the ZLED7x20’s integrated high-side output current-sensing circuit and high speed internal 40V power switch. An external control signal, which can be a DC voltage, PWM, or microcontroller-generated waveform, on the ADJ pin can also be used to linearly adjust a continuous output current or to control a gated out- put current. The output can be turned off by applying a voltage lower than 0.2V to the ADJ pin, which puts the ZLED7x20 in a low-current standby state. The ZLED7x20 enables diverse industrial and consumer lighting applications requiring high driving currents, wide operating voltage range, high efficiency, and variable brightness control. It offers over-temperature and LED open-circuit pro- tection. The ZLED7x20 can also minimize bill-of- material costs because very few external com- ponents are required for most applications. Only a resistor, a diode, an inductor, and three capacitors are needed for a typical basic application. Features • Up to 1.2A output current • Internal 40V power switch • Wide DC input voltage range 6 to 40 VDC • Output current accuracy: 3% (typical) • Dimming ratio: 1200:1 • LED open-circuit protection • Thermal shutdown protection Benefits • High efficiency: up to 98% • Single pin on/off and brightness control using DC voltage or PWM • Very few external components needed for operation • Footprint compatible with our ZLED7000 depending on the application. Available Support • Evaluation Kit Physical Characteristics • Operating junction temperature: -40°C to 125°C • Switching frequency: up to 1MHz ZLED7x20 Family Selection Matrix Product Max. Current Output Package ZLED7020 1.2A SOT89-5 ZLED7320 1.0A DFN-5 ZLED7520 0.75A DFN-5 ZLED7720 0.35A DFN-5 ZLED7x20 Typical Application Circuit |
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