Diodes ZXLD1366 User Manual
Zxld1366, Description, Pin assignments
ZXLD1366
Document number: DS31992 Rev. 8 - 2
1 of 30
October 2013
© Diodes Incorporated
A Product Line of
Diodes Incorporated
ZXLD1366
HIGH ACCURACY 1A, 60V LED DRIVER WITH AEC-Q100
Description
The ZXLD1366 is a continuous mode inductive step-down
converter, designed for driving single or multiple series connected
LEDs efficiently from a voltage source higher than the LED voltage.
The device operates from an input supply between 6V and 60V and
provides an externally adjustable output current of up to 1A.
The ZXLD1366 has been qualified to AECQ100 Grade 1 enabling
operation in ambient temperatures from -40°C to +125°C.
The ZXLD1366 uses a high-side output current sensing circuit
which uses an external resistor to set the nominal average output
current. The output current can be adjusted above, or below the set
value, by applying an external control signal to the 'ADJ' pin.
Enhanced output current dimming resolution can be achieved by
applying a PWM signal to the ‘ADJ’ pin.
Soft-start can be forced using an external capacitor from the ADJ
pin to ground. 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
Typical Application Circuit
Features
• Typically better than 0.8% output current accuracy
• Simple and with low part count
• Single pin on/off and brightness control using DC voltage or
PWM
• PWM resolution up to 1000:1
• High efficiency (up to 97%)
• Switching frequencies up to 1MHz
• Wide input voltage range: 6V to 60V
• Inherent open-circuit LED protection
• Available in thermally enhanced Green molding packages
SO-8EP θ
JA
= +
45°C/W
U- DFN3030-6 θ
JA
= +
44°C/W
TSOT25 θ
JA
=
+
82°C/W
Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
• Qualified to AEC-Q100 Grade 1
SO-8EP ZXLD1366EN8TC
TSOT25 ZXLD1366ET5TA
Applications
• Automotive
lighting
•
Low voltage industrial lighting
•
LED back-up lighting
• Illuminated
signs
• Emergency
lighting
• SELV
lighting
• Refrigeration
lights
Notes:
1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied.
2. S more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free,
"Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl)
and <1000ppm antimony compounds.
(TOP VIEW)
TSOT25
I
SENSE
V
IN
2
1
3
4
5
ADJ
GND
LX
1
2
3
4
5
6
U-DFN3030-6
(TOP VIEW)
LX
GND
ADJ
V
IN
I
SENSE
GND
(TOP VIEW)
SO-8EP
4
6
5
1
7
2
8
3
LX
GND
GND
ADJ
V
IN
GND
GND
I
SENSE
V
IN
I
SENSE
LX
GND
ZXLD1366
ADJ
V
IN
(24V)
Rs
0.2V
4.7µF
C1
GND
100nF
D1
L1