ZXLD1370_1103 Datasheet, PDF (1/36 Pages) Diodes Incorporated – 60V HIGH ACCURACY BUCK/BOOST/BUCK-BOOST LED DRIVER-CONTROLLER WITH AEC-Q100

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Diodes Incorporated
ZXLD1370
60V HIGH ACCURACY BUCK/BOOST/BUCK-BOOST LED DRIVER-CONTROLLER WITH AEC-Q100
Description
Pin Assignments
The ZXLD1370 is an LED driver controller IC for driving
external MOSFETs to drive high current LEDs. It is a
multi-topology controller enabling it to efficiently control
the current through series connected LEDs. The multi-
topology enables it to operate in buck, boost and buck-
boost configurations.
The 60V capability coupled with its multi-topology
capability enables it to be used in a wide range of
applications and drive in excess of 15 LEDs in series.
The ZXLD1370 is a modified hysteretic controller using a
patent pending control scheme providing high output
current accuracy in all three modes of operation. High
accuracy dimming is achieved through DC control and
high frequency PWM control.
The ZXLD1370 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.
Features
TSSOP-16EP
• 0.5% typical output current accuracy
• 6 to 60V operating voltage range
• LED driver supports Buck, Boost and Buck-boost
• configurations
• 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
Buck-boost diagram utilizing thermistor and TADJ
Curve showing LED current vs. T_LED
ILED
100%
Rth
REF
TAD
TH1
ZXLD1370
Document number: DS32165 Rev. 4 - 2
10%
70˚C
85˚C
TLED
Thermal network response in Buck configuration with:
Rth = 2kΩ and TH1=10kΩ (beta =3900)
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March 2011
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