ZXLD1350 Datasheet, PDF (1/22 Pages) Zetex Semiconductors – 350mA LED driver with internal switch

Description
The ZXLD1350 is a continous mode inductive step-down
converter with integrated switch and high side current sense.
It operates from an input supply from 7V to 30V driving single
or multiple series connected LEDs effeciently external
adjustable output current up to 350mA.
The ZXLD1350 has been qualified to AECQ100.2 allowing it
to operate at ambient temperatures from -40 to 105°C.
The output current can be adjusted by applying a DC voltage
or a PWM waveform. 100:1 adjustment of output current is
possible using PWM control. Applying a voltage of 0.2V or
lower to the ADJ pin turns the output off and switches the
device into a low current standby state.
A Product Line of
Diodes Incorporated
ZXLD1350
30V 350mA LED DRIVER with AEC-Q100
Pin Assignments
LX
GND
ADJ
V_IN
TSOT23-5
Top View
I_SENSE
Features
• Simple low parts count
• Internal 30V NDMOS switch
• Internal PWM filter
• High efficiency (up to 95%^(*))
• Wide input voltage range: 7V to 30V
• 40V transient capability
• Up to 1MHz switching frequency
• Typical 4% output current accuracy
• Qualified to AEC-Q100.2
Typical Application Circuit
V_IN
R_S
LED
Cled
L1
D1
V_IN
I_{S E NSE}
LX
ZXLD1350
*Using standard external components as specified under electrical characteristics. Efficiency is dependent upon the number of
LEDs driven and on external component types and values.
ZXLD1350
Document number: DS33468 Rev. 7 - 2
1 of 22
www.diodes.com
November 2010
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