Diodes ZXLD1350 User Manual
Description, Pin assignments, Features
ZXLD1350
30V 350mA LED DRIVER with AEC-Q100
ZXLD1350
Document number: DS33468 Rev. 8 - 2
1 of 22
March 2011
© Diodes Incorporated
A Product Line of
Diodes Incorporated
Description
The ZXLD1350 is a hysteretic 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 efficiently external
adjustable output current up to 350mA.
The ZXLD1350 has been qualified to AECQ100 grade 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.
Pin Assignments
Features
•
Simple low parts count
•
Internal 30V NDMOS switch
•
Internal PWM filter
•
High efficiency (up to 95% (Note 1)
•
Wide input voltage range: 7V to 30V
•
40V transient capability
•
Up to 1MHz switching frequency
•
Typical 4% output current accuracy
•
Qualified to AEC-Q100 Grade 2
•
Available in “Green” Molding Compound (No Br, Sb)
•
Lead Free Finish/ RoHS Compliant (Note 2)
Typical Application Circuit
SET
V
IN
LX
GND
ADJ
ZXLD1350
R
S
0.33
Ω
L1
47µH
C1
1µF
GND
V
IN
7~30V
Notes: 1. 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.
2. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at:
I
SENSE
V
IN
ADJ
GND
LX
TSOT23-5
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