A Product Line of Diodes Incorporated ZXLD1356/ ZXLD1356Q 60V 550mA LED DRIVER and AUTOMOTIVE GRADE Description Pin Assignments The ZXLD1356 is a continuous mode inductive step-down converter, (TOP VIEW) designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. The device operates LX 1 5 V IN from an input supply between 6V and 60V and provides an externally adjustable output current of up to 550mA. Depending upon supply GND 2 voltage and external components, this can provide up to 30 watts of 4 I output power. 3 ADJ SENSE TSOT25 The ZXLD1356 has been qualified to AECQ100 Grade 1 enabling operation in ambient temperatures from -40C to +125C (TOP VIEW) Output current can be adjusted above, or below the set value, by V applying an external control signal to the ADJ pin. Enhanced output LX 1 6 IN current dimming can be achieved by applying a PWM signal to the ADJ GND 2 5 GND pin. 34 I ADJ SENSE Features V-DFN3030-6 Typically better than 0.8% output current accuracy Simple and with low part count Applications Single pin on/off and brightness control using DC voltage or PWM PWM resolution up to 1000:1 Low Voltage Halogen Replacement LEDs High efficiency (up to 97%) Automotive Lighting Wide input voltage range: 6V to 60V Low Voltage Industrial Lighting Inherent open-circuit LED protection LED Back-Up Lighting Available in thermally enhanced packages Illuminated Signs V-DFN3030-6 44C/W JA Emergency Lighting TSOT25 82C/W JA SELV Lighting Available in Green Molding Compound (No Br, Sb) with lead Free Refrigeration Lights Finish/ RoHS Compliant Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) ZXLD1356QET5TA Automotive Grade qualified to AEC-Q100 Grade 1 Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See A Product Line of Diodes Incorporated ZXLD1356/ ZXLD1356Q Typical Applications Circuit D1 Rs V (24V) IN 0.36V L1 C1 4.7F V I IN SENSE LX ADJ ZXLD1356 100nF GND GND Pin Descriptions Pin Pin Number Function Name TSOT25 V-DFN3030-6 LX 1 1 Drain of NDMOS switch GND 2 2, 5 Ground (0V) Multi-function On/Off and brightness control pin: Leave floating for normal operation.(V = V = 1.25V giving nominal average output ADJ REF current o I = 0.2V/R ) OUTnom S ADJ 3 3 Drive to voltage below 0.2V to turn off output current Drive with DC voltage (0.3V<V <2.5V) to adjust output current from 24% to 200% of ADJ I OUTnom Connect a capacitor from this pin to ground to define soft-start time. Soft-start time is approx.0.2ms/nF Connect resistor R from this to V to define nominal average output current I = 0.2/R S IN OUTnom S I 4 4 SENSE (Note: R =0.36V with ADJ pin open circuit) SMIN Input voltage (6V to 60V). Decouple to ground with 4.7F of higher X7R ceramic capacitor close V 5 6 IN to device Exposed pad (EP) - connected to device substrate. To improve thermal impedance of package the EP must be connected to power ground but Pad Pad should not be used as the 0V (GND) current path. It can be left floating but must not be connected to any other voltage other than 0V. 2 of 29 October 2012 ZXLD1356/ ZXLD1356Q Diodes Incorporated www.diodes.com Document number: DS33470 Rev. 4 - 2