ZXLD1360ET5TA Diodes Incorporated

A Product Line of Diodes Incorporated ZXLD1360 30V 1A LED DRIVER with AEC-Q100 Description Pin Assignments The ZXLD1360 is a continuous mode inductive step-down converter with integrated switch and high side current sense. V LX IN It operates from an input supply from 7V to 30V driving single GND or multiple series connected LEDs efficiently externally adjustable output current up to 1mA. ADJ I The ZXLD1360 has been qualified to AEC-Q100 Grade 1 SENSE enabling operation in ambient temperatures from -40C to TSOT23-5 125C. Top View The output current can be adjusted by applying a DC voltage or a PWM waveform to the ADJ pin 100:1 adjustment of output current is possible using PWM control. Applying 0.2V or lower to the ADJ pin turns the output off and switches the device into a low current standby state. Features Typical Application Circuit Simple low parts count Single pin on/off and brightness control using DC voltage RR L1L1 or PWM SS VV ININ High efficiency (up to 95%) 7~37~300VV 0.10.1 47H47H Wide input voltage range: 7V to 30V 40V transient capability VV LXLX ININ SETSET Qualified to AEC-Q100 Grade 1 C1C1 Available in thermally enhanced packages ADJADJ ZXLD1ZXLD1360360 4.4.77FF o TSOT23-5 82 C/W JA Available in Green molding (no Br, Sb) with lead free GNGNDD finish/RoHS compliant Up to 1MHz switching frequency GNDGND Typical 4% output current accuracy 1 of 25 March 2011 ZXLD1360 Diodes Incorporated www.diodes.com Document number: DS33471 Rev. 4 - 2 A Product Line of Diodes Incorporated ZXLD1360 Block Diagram D1 V IN L1 R S 54V I 1 LX IN SENSE 5V R1 Voltage C1 0.2V regulator 4.7F Low voltage detector MN ADJ 3 R4 R5 R2 200k 20k D1 1.25V R3 1.35V GND 2 Figure 1. Block diagram With Pin Connections Pin Descriptions Name Pin No. Description LX 1 Drain of NDMOS switch GND 2 Ground (0V) Multi-function On/Off and brightness control pin: Leave floating for normal operation.(V = V = 1.25V giving nominal average output current ADJ REF o I = 0.1/R ) OUTnom S 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 25% to 200% of ADJ ADJ 3 I OUTnom Drive with PWM signal from open-collector or open-drain transistor, to adjust output current. Adjustment range 25% to 100% of I for f>10kHz and 1% to 100% of I for f < OUTnom OUTnom 500Hz Connect a capacitor from this pin to ground to increase soft-start time. (Default soft-start time = 500s. Additional soft-start time is approximately 500s/nF) Connect resistor R from this to V to define nominal average output current I =0.1/R S IN OUTnom S I 4 SENSE (Note: R =0.1V with ADJ pin open circuit) SMIN Input voltage (7V to 30V). Decouple to ground with 4.7F of higher X7R ceramic capacitor close to V 5 IN device 2 of 25 March 2011 ZXLD1360 Diodes Incorporated www.diodes.com Document number: DS33471 Rev. 4 - 2