ZXLD1370_V1 Datasheet, PDF (1/2 Pages) Diodes Incorporated – Versatile LED driver increases reliability of high brightness lamps

NPA Number 001
New Product
Announcement
ZXLD1370
Versatile LED driver increases
reliability of high brightness lamps
Description
The ZXLD1370 is a high
accuracy LED driver controller;
the LED load current that can
be delivered is dependent on
the external MOSFET.
It can be used as a
ƒ Buck converter
ƒ Boost converter
ƒ Buck-Boost converter.
It is Diodes’ first LED driver to
offer this functionality.
The device can drive up to
16 LEDs in series from a
voltage source of 6.5V to
60V. Series connection of
the LED provides identical LED
currents resulting in uniform
brightness and eliminates
the need for ballast resistors.
The ZXLD1370 switches at
frequencies up to 1MHz, which
allows the use of small size
external components, hence
minimizing the required
PCB area.
A 1.5A LED driver converter is
expected to release in June
2010.
The Diodes advantage
The ZXLD1370 provide simple high reliability solution for driving
multiple extremely high brightness LEDs in multiple topologies
ƒ High accuracy LED control: 1% reference tolerance
Better brightness control and matching between lamps
ƒ Multi-topology device
1 device can be used in buck lighting, boost light and buck-boost
lighting apps
ƒ LED thermal management via external thermistor
Improves reliability of LED lamps
ƒ Separate 1000:1 PWM dimming capability
Improves dynamic range of dimming at lower light levels
ƒ Switching frequency up to 1MHz
Reduces value of inductor reducing size of solution
ƒ Two- pin diagnostic feedback pins
Reports back to system the state of LED driver and load can be used
to increase reliability of overall system
Circuit functions
ƒ Buck driving of 3W and
1W LED
ƒ Constant Current Source
ƒ Boost driving of 3W
and 1W LED
www.diodes.com