General Description
The LD5805 is a 4-channel linear current controller which combines with a boost switching controller. It’s an ideal solution for driving high power LED backlights. The LD5805 can achieve high accuracy of constant current to 4 LED strings with 4 internal MOSFET. For each LED string, the current is adjustable to drive up to 250mA.
FEATUREs
● Input Voltage range: 6V to 36V
● Drives up to 4 strings in parallel, up to 250mA per
string
● LED current balance rate is 2.7%
● Programmable switching frequency
● PWM Input for PDIM or ADIM dimming control
Use PDIM mode: PWM Input frequency Range
100Hz ~ 1kHz
Use ADIM mode: PWM Input frequency Range 1kHz
~ 30kHz
● HV gate Voltage of 10V for driver
● Multi-chip parallel operation
● LED short and open protection
● LED pin short to ground protection
● Programmable over-voltage protection
● Thermal shutdown
APPLICATIONs
● Backlight for GPS, Portable DVD
● LED Backlight for LCD Monitor/ TV