Zetex Semiconductors PLC manual TSOT23-5 pack, ZXLD1362EV3 User Guide issue, 11-01-2008

ZXLD1362 DEVICE DESCRIPTION

The ZXLD1362 is a continuous mode inductive driver in a TSOT23-5 package, for driving one or more series connected LEDs efficiently from a voltage source higher than the LED voltage. The device includes the output switch and a current sense circuit, which requires an external sense resistor to set the nominal current up to 1000mA.

ZXLD1362 DEVICE FEATURES		DEVICE APPLICATIONS
•	Drives one or more series-connected LEDs	•	LED flashlights.
• LEDs up to 1000mA.		• High Power LED driving.
•	Internal 60V switch.	• Low-voltage halogen replacement LEDs.
• Wide input voltage: 7V to 60V.		•	Automotive lighting.
• Inherent open circuit LED protection.		•	Illuminated signs.

•Brightness control using DC or PWM.

•Internal PWM filter.

ZXLD1362 Device Packages, Pin and Definitions

		TSOT23-5 pack
ZXLD1362 Device Pin Definition
Name	Pin No	Description
LX	1	Drain of NDMOS switch.
GND	2	Ground (0V).
ADJ	3	Internal voltage ref. pin (1.25V) :
		• Leave floating for normal operation.
		• Connect to GND to turn off output current.
		• Drive with a DC voltage (0.3V to 1.25V) or with a PWM signal to adjust
		output current
		• Connect a capacitor from this pin to ground to set the soft-start time.
ISENSE	4	Connect a sense resistor, Rs, from the ADJ pin to VIN to sense the nominal
		output current. Nominal Iout = 0.1/ R1
VIN	5	Input voltage: 7V to 60V. Decouple to ground with a 100nF and a 10uF or
		higher ceramic capacitor depending on the input voltage[1].

	ORDERING INFORMATION
EVALBOARD ORDER NUMBER	DEVICE ORDER NUMBER
ZXLD1362EV3		ZXLD1362E5TA

Please note: Evaluation boards are subject to availability and qualified leads.

ZXLD1362EV3 User Guide issue 1 2/7 11-01-2008