|Title||IC LED MV INT SWITCH SO-8EP|
Diodes Incorporated's AL8862 is a step-down DC-DC converter designed to drive LEDs with a constant current. It operates with an input supply voltage from 5 V to 60 V and provides an externally adjustable output current up to 1 A. The AL8862 integrates a low RDS(ON) power switch and a high-side output current sensing circuit. The maximum output current of AL8862 is set via an external resistor connected between the VIN and SET input pins. Dimming is achieved by applying either a DC voltage or a PWM signal at the CTRL input pin. It is available in the thermally enhanced SO-8EP package.
|Datasheet||Download AL8862SP-13 datasheet
The is a step-down DC/DC converter designed to drive LEDs with a constant current. The AL8862 operates with an input supply voltage from to 60V and provides an externally adjustable output current to 1A. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The AL8862 switches at frequency to 1MHz. This allows the use of smaller size external components, hence minimizing the PCB size. The AL8862 integrates the power switch and a high-side output current sensing circuit. Maximum output current AL8862 is set via an external resistor connected between the VIN and SET input pins. Dimming is achieved by applying either a DC voltage or a PWM signal at the CTRL input pin. The soft-start time can be adjusted using an external capacitor from the CTRL pin to ground. An input voltage 0.3V or lower at CTRL pin will shut down the power switch.Applications
Commercial & Industrial Lighting Appliances Interior Lighting Architecture Detail Lighting External Driver with Multiple Channels and Smart LightingFeatures
Wide Input Voltage Range: to 60V Output Current to 1A Internal 60V NDMOS Switch Typical 4% Output Current Accuracy Single Pin for On/Off and Brightness Control by DC Voltage or PWM Signal High Efficiency (Up to 97%) LED Short-Circuit Protection Inherent Open-Circuit LED Protection Current-Sense Resistor Short-Circuit Protection Over Temperature Shutdown to 1MHz Switching Frequency SO-8EP Packages Available in Green Molding Compound (No Br, Sb) Totally Lead-Free & Fully RoHS Compliant (Notes & 2) Halogen and Antimony Free. "Green" Device (Note 3)
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporate ds definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green" products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.
Pin Number Pin Name SET GND NC VIN SW Function Set Nominal Output Current Pin. Connect resistor RSET from this pin to VIN to define nominal average output current. Ground IC No connection Input voltage to 60V). Decouple to ground with 10F or higher X7R ceramic capacitor close to device. Switch Pin. Connect inductor/freewheeling diode here, minimizing track length at this pin to reduce EMI. Multi-function On/Off and brightness control pin: Leave floating for normal operation. Drive to voltage below 0.3V to turn off output current Drive with DC voltage (0.4V < VSET< 2.5V) to adjust output current from 100% of IOUT_NOM Drive with an analog voltage >2.6V output current will 100% of IOUT_NOM A PWM signal (Low level <0.3V, High level >2.6V, transition times less than 1us) allows the output current to be adjusted over a wide range to 100% Connect a capacitor from this pin to ground to increase soft-start time. (Default soft-start time = 0.1ms. Additional soft-start time is approx. 1.5ms/1nF) Exposed pad/TAB connects to GND and thermal mass for enhanced thermal impedance.SW VDD Generator Current Monitor Comp PWM Logic Driver Ilimiter
Parameter Input Voltage SW, SET Pin Voltage CTRL Pin Input Voltage Operating Ambient Temperature Operating Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10sec)
4. Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. Thes e are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to Absolute Maximum Ratings for extended periods may affect device reliability.
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