ZXLD1366EN8TC Diodes Incorporated

ZXLD1366 HIGH ACCURACY 1A, 60V LED DRIVER WITH AEC-Q100 Description Pin Assignments The ZXLD1366 is a continuous mode inductive step-down converter, designed for driving single or multiple series connected (TOP VIEW) LEDs efficiently from a voltage source higher than the LED voltage. The device operates from an input supply between 6V and 60V and LX 1 5 V IN provides an externally adjustable output current of up to 1A. GND 2 The ZXLD1366 is qualified to AEC-Q100 Grade 1, enabling operation in ambient temperatures from -40C to +125C. 4 I 3 ADJ SENSE The ZXLD1366 uses a high-side output current sensing circuit TSOT25 which uses an external resistor to set the nominal average output current. The output current can be adjusted above, or below the set value, by applying an external control signal to the ADJ pin. (TOP VIEW) V Enhanced output current dimming resolution can be achieved by LX 1 6 IN applying a PWM signal to the ADJ pin. 2 5 GND GND Soft-start can be forced using an external capacitor from the ADJ pin to ground. Applying a voltage of 0.2V or lower to the ADJ pin 3 4 I ADJ turns the output off and switches the device into a low current SENSE standby state. U-DFN3030-6 V-DFN3030-6 Features (TOP VIEW) Typically Better than 0.8% Output Current Accuracy LX 1 8 V IN Simple and with Low Part Count GND 2 7 GND Single Pin On/Off and Brightness Control Using DC Voltage or PWM GND 3 6 GND PWM Resolution up to 1000:1 ADJ 4 I 5 SENSE High Efficiency (up to 97%) Switching Frequencies up to 1MHz SO-8EP Wide Input Voltage Range: 6V to 60V Inherent Open-Circuit LED Protection Available in Thermally Enhanced Green Molding Packages Typical Application Circuit - SO-8EP = +45C/W JA - V-DFN3030-6 = +44C/W JA D1 - TSOT25 JA = +82C/W Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2) Rs V (24V) IN Halogen and Antimony Free. Green Device (Note 3) 0.2V Qualified to AEC-Q100 Grade 1 An Automotive Compliant part is available under a separate datasheet (ZXLD1366Q) Applications L1 Low Voltage Industrial Lighting C1 4.7F LED Back-Up Lighting Illuminated Signs Emergency Lighting VIN ISENSE LX ADJ SELV Lighting ZXLD1366 100nF GND Refrigeration Lights GND Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See ZXLD1366 Block Diagram D1 V IN L1 R S I 5 V 4 SENSE 1 IN LX 5V R1 C1 4.7F Voltage - regulator 0.2V + Low voltage - detector + MN - Adj + 3 R5 R4 600KHz 20K 50K R2 D1 1.25V - + R3 1.35V Gnd 2 Figure 1. Pin Connection for TSOT25 Package Pin Description Name TSOT25 V-DFN3030-6 SO-8EP Function LX 1 1 1 Drain of NDMOS switch GND 2 2, 5 2, 3, 6, 7 Ground (0V) Multi-function On/Off and brightness control pin: Leave floating for normal operation.(VADJ = VREF = 1.25V giving nominal average output current I = 0.2V/ ) OUTnom RS Drive to voltage below 0.2V to turn off output current ADJ 3 3 4 Drive with DC voltage (0.3V < V < 2.5V) to adjust output current from 25% ADJ to 200% of I OUTnom Connect a capacitor from this pin to ground to set soft-start time. Soft start time increases approximately 0.2ms/nF Connect resistor RS from this pin to VIN to define nominal average output current I = 0.2V . I 4 4 5 OUTnom /RS SENSE (Note: R = 0.2V with ADJ pin open-circuit) SMIN Input Voltage (6V to 60V). Decouple to ground with 4.7F of higher X7R ceramic 5 6 8 V IN capacitor close to device. Exposed Pad (EP) - connected to device substrate. To improve thermal impedance of package the EP must be connected to power ground but should not be used as the 0V (GND) current path. Pad - Pad Pad It can be left floating but must not be connected to any other voltage other than 0V. 2 of 31 ZXLD1366 April 2016 Diodes Incorporated www.diodes.com Document number: DS31992 Rev. 9 - 2