DatasheetsPDF.com

OB3362F Dataheets PDF



Part Number OB3362F
Manufacturers On-Bright
Logo On-Bright
Description 4 Channels High Performance LED Driver
Datasheet OB3362F DatasheetOB3362F Datasheet (PDF)

On-Bright Confidential to IVT OB3362F 4 Channels High Performance LED Driver GENERAL DESCRIPTION The OB3362F is a highly integrated and high performance LED driver that optimized for LCD backlight application. It integrates a boost driver and 4 channels of current balancer that optimized to drives multi LED arrays, and thus provides a high performance LED backlight solution with minimized BOM count. The OB3362F contains a PWM boost driver which uses current mode control and fixed frequency ope.

  OB3362F   OB3362F


Document
On-Bright Confidential to IVT OB3362F 4 Channels High Performance LED Driver GENERAL DESCRIPTION The OB3362F is a highly integrated and high performance LED driver that optimized for LCD backlight application. It integrates a boost driver and 4 channels of current balancer that optimized to drives multi LED arrays, and thus provides a high performance LED backlight solution with minimized BOM count. The OB3362F contains a PWM boost driver which uses current mode control and fixed frequency operation. The operation frequency can be programmed by setting external resistor value at RI pin. The OB3362F integrates 4 channels current balancer with up to 200mA current capability per channel and it can achieve 3% matching accuracy among LED strings. The minimum voltage of current source is regulated to as lower as 350mV, which benefits the efficiency and improves the IC thermal performance. The OB3362F supports external PWM dimming and internal burst dimming mode which allow flexible control of the backlight luminance. The LED current is directly modulated by external PWM duty cycle when PWM dimming mode is selected. The LED current can be adjusted by an external DC voltage when internal burst dimming mode is selected. TYPICAL APPLICATION FEATURES „ 10V gate drive, better MOS compatibility „ High Efficiency and Compact Size „ 6V to 30V Input Voltage Range „ 3% Matching Accuracy Between 4 LED Strings Control Current „ 100KHz~600KHz Operating Frequency „ Internal/External PWM Dimming „ Very Low Standby Power „ Programmable Over Voltage Protection „ Under Voltage Lockout(UVLO) „ Open/Short LED Protection „ Thermal Shutdown APPLICATIONS „ LCD Monitor „ LCD TV „ Flat panel display OB3362F is offered in 16-pin ESOP/DIP Figure1: OB3362F Typical Application Schematic ©On-Bright Electronics Confidential -1- Preliminary Datasheet OB_DOC_DS_3362F00 On-Bright Confidential to IVT OB3362F 4 Channels High Performance LED Driver Absolute Maximum Ratings Parameter Vin Input Voltage to GND FAULT to GND LEDX to GND I/O to GND Operating Ambient Temp. TA Operating Junction Temp. TJ Min/Max Storage Temp. Tstg Lead Temp. (10 Sec) Value -0.3V to 40V Vin-7V to Vin -0.3V to 40V -0.3V to 7V -20℃ ~ 85℃ 150℃ -55℃ ~150℃ 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 Operating Frequency Value 6V to 30V 100KHz to 600KHz Ordering Information Part Number OB3362FRP OB3362FHP OB3362FHPA Description DIP16, Pb-free in Tube ESOP16, Pb-free in Tube ESOP16, Pb-free in T&R Marking Information ©On-Bright Electronics Confidential -2- Preliminary Datasheet OB_DOC_DS_3362F00 On-Bright Confidential to IVT OB3362F 4 Channels High Performance LED Driver Pin Configuration for OB3362F ENA DIM GND RI BFIS/ ET DMOD LED1 LED2 1 2 3 4 5 6 7 8 16 CMP 15 VCC 14 VIN 13 GATE 12 CS 11 OVP 10 LED4 9 LED3 ESOP16 / DIP16 Terminal Assignment for OB3362F Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Pin Name ENA DIM GND RI ISET BF/DMOD LED1 LED2 LED3 LED4 OVP CS GATE VIN VCC CMP I/O Pin Function Input On/off control signal input pin Input DC voltage or PWM signal input pin for dimming control, the DC voltage dimming is negative polarity Power Ground I/O Set the switching frequency by external resistor I/O Set the output current of every channels by external resistor Dimming mode selection pin I/O • Internal bust dimming mode: connect an external capacitor to ground, and the bust frequency is set by the capacitance • External PWM dimming mode: short this pin to ground. I/O LED string current input I/O LED string current input I/O LED string current input I/O LED string current input Input Over voltage protection input Input Current sense input Output Gate drive output Power Power supply I/O Internal 10V LDO output I/O Loop compensation and soft start time setting ©On-Bright Electronics Confidential -3- Preliminary Datasheet OB_DOC_DS_3362F00 On-Bright Confidential to IVT Functional Block Diagram VIN OB3362F 4 Channels High Performance LED Driver VCC ENA GND RI CMP BF/DMOD DIM UVLO LDO 10V 5V Drive OSC CLK S + - - 350mV EA + PWM Control Logic + - 1.2V Dimming Control DIM Feedback Control 1.2V + - Current Control ... GATE CS OVP LED1 LED4 ISET Figure2: OB3362F Functional Block Diagram ©On-Bright Electronics Confidential -4- Preliminary Datasheet OB_DOC_DS_3362F00 On-Bright Confidential to IVT OB3362F 4 Channels High Performance LED Driver Electrical Characteristics VIN=12V, ENA=5V, ISET=60kohm to ground, TA=25℃, if not otherwise noted. Parameter Symbol Condition Min Operating Input Voltage VIN 6 St.


BTA256M OB3362F KIA78R25F


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)