EUP2592 Datasheet | Eutech Microelectronics

8-String White LED Driver for LCD Panel Application DESCRIPTION The EUP2592 is an 8-channel WLED driver that controls WLED current for LCD backlight application. The EUP2592 is capable of driving up to eight strings in parallel and 12 LEDs per string. Each string is terminated with ballast that achieves ±1.5% current regulation accuracy between strings, ensuring even LED brightness. The EUP2592 have wide input voltage range from 4.5V to 28V, and provide adjustable 5m A to 50m A LED current. EUP2592 uses an external PWM signal to control WLED dimming. EUP2592 has built in many fault protections. The EUP2592 step-up controller Features an internal 150mΩ (typ.), 48V (max.) power MOSFET with local current-sense amplifier for accurate cycle-by-cycle current limit. This architecture greatly simplifies the external circuitry and saves PCB space. The EUP2592 minimizes the headroom voltage of output and power loss by detecting the highest LED forward voltage dynamically. Low-feedback voltage at each LED string 360m V (typ.) at 20m A LED current helps reduce power loss and improve efficiency. The EUP2592 internally generates a PWM signal for accurate WLED dimming control. The PWM b frequency is resistor programmable, while PWM duty ‘Ry w cycle is controlled directly from an Vm external PWM signal or through an adjustable resistor at PWMO pin. m .co a This internal PWM dimming control provides h c te dimming range with 8-bit resolution to maximize o f go can also battery life. The EUP2592 WLED brightness w. w be directly modulated with an w external PWM signal from 100Hz to 10k Hz. The EUP2592 have extensive protection that include string open and short detection, over voltage protection, over-temperature protection and an optional input over-current protection with an external fault disconnect switch. Features Up to 8 strings in parallel and 12 LEDs per string Maximum number of LEDs that can be driven is 96 (8x12) WLEDs Accurate PWM Dimming Control with 8-bit...