Zetex Semiconductors PLC ZXLD1362EV3 Manuale Utente
ZXLD1362EV3 User Guide issue 1
2/7
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
•
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
•
Drives one or more series-connected LEDs
•
LEDs up to 1000mA.
•
Internal 60V switch.
•
Wide input voltage: 7V to 60V.
•
Inherent open circuit LED protection.
•
Brightness control using DC or PWM.
•
Internal PWM filter.
DEVICE APPLICATIONS
• LED
flashlights.
•
High Power LED driving.
•
Low-voltage halogen replacement LEDs.
• Automotive
lighting.
• Illuminated
signs.
ZXLD1362 Device Packages, Pin and Definitions
TSOT23-5 pack
ZXLD1362 Device Pin Definition
Name Pin
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
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 I
out
= 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].
higher ceramic capacitor depending on the input voltage[1].
ORDERING INFORMATION
EVALBOARD ORDER NUMBER
ZXLD1362EV3
Please note: Evaluation boards are subject to
availability and qualified leads.
availability and qualified leads.
DEVICE ORDER NUMBER
ZXLD1362E5TA