EUP2588
4 Strings High Current White LED
Driver with Boost Controller
DESCRIPTION
The EUP2588 is a high power and high efficiency
boost controller with 4-channel current sinker which is
ideal for large LCD backlighting applications.
EUP2588 uses current mode, fixed frequency
architecture which can clamp the inductor peak current
each cycle. The switching frequency is programmable
by an external frequency setting resistor. It drives an
external MOSFET to boost up the output voltage from
a 4.5V to 28V input supply. The EUP2588 regulates
the current in each LED string to the programmed
value set by an external current setting resistor. The
EUP2588 current matching can achieve
±1.5%
and
regulation accuracy can reach
±2%.
A 3µA shutdown current and 0.85V (ILED@180mA)
feedback voltage and Maximum 65V output allows for
up to 18 high-power LEDs in series will greatly
improve efficiency and reduce power dissipation.
The device supports pulse width modulation (PWM)
brightness dimming. During digital PWM dimming,
the WLED current is turned on/off at the duty cycle
and frequency determined by the PWM signal on the
PWMI pin.
The EUP2588 integrated multiple protect functions,
such as LED Open, LED Short, Output Over Voltage,
Over thermal, Input Over Current, and Under Voltage
Lockout (UVLO), these protection will prevent the
LCD backlight from damage.
EUP2588 is available in 16pin SOP packages.
FEATURES
3µA shutdown current
4 strings in parallel and up to 18 LEDs per
string
External PWM Dimming Control
Output voltage up to 65V
Up to 180mA Drive Capability for Each String
Wide Input voltage range 4.5V to 28V
Better than 1.5% LED Current Regulation
Accuracy Between Strings
Boost Switching frequency can be programmed
by external resistor
Multiple Fault Protections
-Current Limit protection
-Output Short circuit detection
-Over-temperature protection
-Output Over-voltage protection
LED current turn off in shutdown mode
Integrated UVLO/ Over Thermal protection
Minimal 0.5µs LED On-Time regulation
Thermal Enhanced 16pin SOP-16 Package
RoHS Compliant and 100% Lead (Pb)-Free
Halogen-Free
APPLICATIONS
LCD Monitor LED Backlighting
LCD-TV LED Backlighting
Typical Application Circuit
Figure 1. Typical Application Circuits
DS2588
Ver1.1
May 2011
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
