OB3350 – Cost Effective LED Controller

Part Number : OB3350

Function : Cost Effective LED Controller

Manufactures : On-Bright

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OB3350 image

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pinout

Description :

Cost Effective LED Controller OB3350 GENERAL DESCRIPTION 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. The OB3350 offers external low frequency PWM (LPWM) dimming method for a wide range of dimming control. The OB3350 offers comprehensive protection such as power MOSFET over current protection (OCP), output over voltage protection (OVP), IC power supply under voltage lockout (UVLO), and LED open protection. FEATURES Current Mode PWM Controller With Good Dynamic Response 8V to 35V Input Voltage Range External PWM Dimming Mode Over Voltage Protection Over Current Protection Under Voltage Lockout (UVLO) Thermal Shutdown APPLICATIONS LCD Monitor LCD TV Flat panel display The OB3350 SOP-8 Packages. 3350 is offered in SOP TYPICAL APPLICATION Figure1. OB3350 Typical Application Schematic ©On-Bright Electronics Confidential -1- Preliminary datasheet OB_DOC_DS_335000 Free Datasheet http://www.datasheetlist.com/ Cost Effective LED Controller OB3350 Absolute Maximum Ratings Parameter Value VIN Input Voltage to GND -0.3V to 40V I/O to GND -0.3V to 7V Operating Ambient Temp. TA -40 ~ 85 Operating Junction Temp. TJ -40 ~ 150 Min/Max Storage Temp. Tstg -55 ~150 Lead Temp. (10 Sec) 260 Note: Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute maximum-rated conditions for extended periods may affect device reliability. Recommended Operating Range Parameter Vin Voltage Burst Dimming Frequency Value 8V to 35V 100Hz to 1KHz Package Thermal Characteristics Parameter Thermal Resistance JA (SOP) Value 150 /W Ordering Information Part Number OB3350CP OB3350CPA CPA Description SOP8, 8, pb-free in tube SOP8, SOP8 pb-free free in T T&R OB3350 X X X Package Cost Effective LED Controller Package Pb- free P:Pb-free Packing Blank:Tube A: Taping C:SOP8 Package Marking Information Y:Year Code WW:Week Code(01-52) ZZZ:Lot Code C:SOP8 Package P:Pb-free Package S:Internal Code(Optional) ©On-Bright Electronics Confidential -2- Preliminary datasheet OB_DOC_DS_335000 Free Datasheet http://www.datasheetlist.com/ Cost Effective LED Controller OB3350 Pin Configuration VIN GATE GND CS 1 2 8 7 PWM OVP COMP FB OB3350 3 4 6 5 No. 1 2 3 4 […]

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OB3350 Datasheet


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