ZXLD1366QEN8TC Diodes Incorporated

ZXLD1366Q AUTOMOTIVE COMPLIANT HIGH ACCURACY 1A, 60V LED DRIVER Description Pin Assignments The ZXLD1366Q is a continuous mode inductive step-down (TOP VIEW) converter, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. 1 V LX 5 IN The device operates from an input supply between 6V and 60V and provides an externally adjustable output current of up to 1A. 2 GND The ZXLD1366Q uses a high-side output current sensing circuit I 3 4 ADJ SENSE which uses an external resistor to set the nominal average output TSOT25 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) Enhanced output current dimming resolution can be achieved by V LX 6 1 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 turns ADJ 3 4 I SENSE the output off and switches the device into a low current standby U-DFN3030-6 state. V-DFN3030-6 The ZXLD1366Q is qualified to AEC-Q100 Grade 1 and is (TOP VIEW) Automotive Compliant supporting PPAPs. LX 1 8 V IN Features GND 2 GND 7 GND 3 Typically Better than 0.8% Output Current Accuracy 6 GND Simple and With Low Part Count 4 I ADJ 5 SENSE Single Pin On/Off and Brightness Control Using DC Voltage or SO-8EP PWM PWM Resolution up to 1000:1 High Efficiency (up to 97%) Typical Application Circuit Switching Frequencies up to 1MHz Wide Input Voltage Range: 6V to 60V Inherent Open-Circuit LED Protection Available in Thermally Enhanced Green Molding Packages V-DFN3030-6 = +44C/W JA SO-8EP = +45C/W JA TSOT25 = +82C/W JA Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Qualified to AEC-Q100 Standards for High Reliability PPAP Capable (Note 4) Applications Automotive Lighting: Internal Door Lights Rear Fog Lamps Position Lights Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See ZXLD1366Q Block Diagram D1 V IN L1 R S I 5 V 4 SENSE 1 IN LX 5V R1 C1 C1 47F 4.7 Voltage - regulator 0.2V + Low voltage - detector + MN - ADJ Adj + 3 R5 R4 600KHz 20K 50K R2 D1 1.25V - + R3 1.35V GND Gnd 2 Figure 1. Pin Connection for TSOT25 Package Pin Description Name TSOT25 SO-8EP V-DFN3030-6 Function Drain of NDMOS switch LX 1 1 1 Ground (0V) GND 2 2, 3, 6, 7 2, 5 Multi-function On/Off and brightness control pin: Leave floating for normal operation. (V = V = 1.25V giving nominal average ADJ REF output current I = 0.2V/ ) OUTnom RS Drive to voltage below 0.2V to turn off output current ADJ 3 4 3 Drive with DC voltage (0.3V < V < 2.5V) to adjust output current from 25% to ADJ 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 R from this pin to V to define nominal average output current I S IN OUTnom = 0.2V . I 4 5 4 /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 V 5 8 6 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 Pad Pad Pad but 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 32 ZXLD1366Q April 2018 Diodes Incorporated www.diodes.com Document number: DS37078 Rev. 2 - 2