GENERAL DESCRIPTION
OB33510 is a highly integrated and cost effective Light Emitting Diode (LED) driver optimized for LCD monitor and LCD TV backlighting application. It provides a high performance LED backlight solution with minimized BOM count.
The OB33510 build-in Power MOSFET and contains a PWM boost driver which uses current mode control and fixed frequency operation to regulate the LED current. The LED current is sensed through an external current sense resistor. The voltage across the sensing resistor is compared with reference level of 400mV, the error is amplified to control the pulse width of the power switch thus to regulate the current flowing the LED.
The OB33510 offers PWM to analog dimming method for a wide range of dimming control.
The OB33510 offers comprehensive protection such as power MOSFET over current protection (OCP), output over voltage protection (OVP), Diode & Inductor short protection, LED cathode short to GND protection, IC power supply under voltage lockout (UVLO), and LED open protection.
FEATURES
Current Mode PWM Control With Good Dynamic Response
9V to 30V Input Voltage Range
Built in 100V power MOSFET
PWM to analog Dimming Mode
Over Voltage Protection
Over Current Protection
Under Voltage Lockout (UVLO)
Thermal Shutdown
Diode & Inductor Short Protection
LED cathode short to GND Protection
SOP-8 Package
APPLICATIONS
LCD Monitor
LCD TV
Flat panel display