OB3350 Schematic – OB3350CP Equivalent

The LED Controller learn more.

Part Number: OB3350, OB3350CP

Functions: Light Emitting Diode (LED) driver, controller

Package: SOP 8 Pin Type

Manufacturer: On-Bright Electronics


OB3350 datasheet controller


LED driver controller ICs are integrated circuits specifically designed to control and drive LEDs (Light-Emitting Diodes). These ICs provide the necessary circuitry to regulate the current, voltage, and brightness of LEDs, ensuring efficient and reliable operation.

OB3350 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 OB3350 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 300mV, the error is amplified to control the pulse width of the power switch thus to regulate the current flowing the LED.


1. Current Mode PWM Controller With Good
2. Dynamic Response
3. 8V to 35V Input Voltage Range
4. External PWM Dimming Mode
5. Over Voltage Protection
6. Over Current Protection
7. Under Voltage Lockout (UVLO)
8. Thermal Shutdown


OB3350 pinout 0B3350

1 VIN: Power Power Supply Input
2 GATE: I/O Gate Driver Output Pin
3 GND: GND Ground
4 CS: I/O Current Sense Input
5 FB: I/O LED Current Feedback Input
6 COMP: I/O Boost Converter Loop Compensation Pin
7 OVP: I/O Over Voltage Protection Sense Input
8 PWM: I/O External PWM Dimming Control



Applications :

1. LCD Monitor
3. Flat panel display


When selecting an LED driver controller IC, it’s important to consider factors such as the required LED current and voltage ratings, the desired dimming control method, the power source, and any specific application requirements.

OB3350 datasheet pdf

OB3350 Datasheet File

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