Zetex Semiconductors PLC zxld1350ev2 manual ZXLD1350 Device Description, Ordering Information

ZXLD1350EV2

ZXLD1350 DEVICE DESCRIPTION

The ZXLD1350 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 350mA.

ZXLD1350 DEVICE FEATURES		DEVICE APPLICATIONS
• Drives one or more series-connected 1W white		•	LED flashlights.
	LEDs up to 350mA.	• High Power LED driving.
•	Internal 30V switch.	• Low-voltage halogen replacement LEDs.
• Wide input voltage: 7V to 30V.		•	Automotive lighting.
• Inherent open circuit LED protection.		•	Illuminated signs.
• Brightness control using DC or PWM.
•	Internal PWM filter.

ZXLD1350 Device Packages, Pin and Definitions

					TSOT23-5 pack
ZXLD1350 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 DC voltage (0.3V to 1.25V) or with PWM signal to adjust
					output current or....
				• Connect a capacitor from this pin to ground to set 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/ Rs
VIN		5	Input voltage: 7V to 30V. Decouple to ground with a 1uF or higher ceramic
			capacitor.
					ORDERING INFORMATION
	EVALBOARD ORDER NUMBER				DEVICE ORDER NUMBER
		ZXLD1350EV2				ZXLD1350E5TA

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

ZXLD1350EV2 User Guide Iss 5 10-04-07