EUP2588.pdf
No.10044
? 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
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.
