ZXLD1374_11 Datasheet, PDF (1/37 Pages) Diodes Incorporated – 60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST

A Product Line of
Diodes Incorporated
ZXLD1374
60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST
LED DRIVER CONVERTER WITH AEC-Q100
Description
Pin Assignments
The ZXLD1374 is a 60V LED driver with integrated 1.5A low
side switch to drive high current LEDs. It is a multi-topology
converter enabling it to operate in Buck, Boost and Buck-boost
configurations; efficiently controlling the current of up to
16 series connected LEDs.
The ZXLD1374 is a modified hysteretic converter using a
patent pending control scheme providing high output current
accuracy in all three topologies. High accuracy dimming is
achieved through DC control and high frequency PWM control.
The ZXLD1374 uses two pins for fault diagnosis. A flag output
highlights a fault, while the multi-level status pin gives further
information on the exact fault.
The ZXLD1374 has been qualified to AEC-Q100 Grade 1
enabling operation in ambient temperatures from -40 to 125°C.
ADJ 1
REF 2
TADJ 3
SHP 4
STATUS 5
SGND 6
PGND 7
PGND 8
N/C 9
N/C 10
TSSOP-20EP
Thermal
Pad
ZXLD1374
20 GI
19 PWM
18 FLAG
17 ISM
16 VIN
15 VAUX
14 LX
13 LX
12 N/C
11 N/C
Features
• 0.5% typical output current accuracy
• 6.3 to 60V operating voltage range
• 1.5A integrated low side switch
• LED driver supports Buck, Boost and Buck-Boost topologies
• Wide dynamic range dimming
o 20:1 DC dimming
o 1000:1 dimming range at 500Hz
• Up to 1MHz switching
• High temperature control of LED current using TADJ
• AEC-Q100 Grade 1
• Available in “Green” Molding Compound (No Br, Sb) with
lead Free Finish/ RoHS Compliant (Note 1)
Note 1: EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions
applied. Please visit our website at
http://www.diodes.com/products/lead_free.html
Typical Application Circuit
ZXLD1374
Document number: DS35032 Rev. 2 - 2
1 of 37
www.diodes.com
March 2011
© Diodes Incorporated