DatasheetsPDF.com

OB2358L Dataheets PDF



Part Number OB2358L
Manufacturers On-Bright Electronics
Logo On-Bright Electronics
Description Current Mode PWM Power Switch
Datasheet OB2358L DatasheetOB2358L Datasheet (PDF)

OB2358L Current Mode PWM Power Switch Frequency Shuffling Product Specification GENERAL DESCRIPTION OB2358L combines a dedicated current mode PWM controller with a high voltage power MOSFET. It is optimized for high performance, low standby power, and cost effective off-line flyback converter applications in sub 27W range. OB2358L offers complete protection coverage with automatic self-recovery feature including Cycle-by-Cycle current limiting (OCP), over load protection (OLP), over te.

  OB2358L   OB2358L


Document
OB2358L Current Mode PWM Power Switch Frequency Shuffling Product Specification GENERAL DESCRIPTION OB2358L combines a dedicated current mode PWM controller with a high voltage power MOSFET. It is optimized for high performance, low standby power, and cost effective off-line flyback converter applications in sub 27W range. OB2358L offers complete protection coverage with automatic self-recovery feature including Cycle-by-Cycle current limiting (OCP), over load protection (OLP), over temperature protection (OTP), over voltage protection and VDD under voltage lockout (UVLO). Excellent EMI performance is achieved with On-Bright proprietary frequency shuffling technique together with soft switching control at the totem pole gate drive output. The tone energy at below 20KHZ is minimized in the design and audio noise is eliminated during operation. OB2358L is offered in DIP8 package. APPLICATIONS Offline AC/DC flyback converter for ■ AC/DC adapter ■ PDA power supplies ■ Digital Cameras and Camcorder Adapter ■ VCR, SVR, STB, DVD&DVCD Player SMPS ■ Set-Top Box Power ■ Auxiliary Power Supply for PC and Server ■ Open-frame SMPS TYPICAL APPLICATION FEATURES ■ Power on Soft Start Reducing MOSFET Vds Stress ■ Frequency shuffling for EMI ■ Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power Design ■ Audio Noise Free Operation ■ Fixed 50KHZ Switching Frequency ■ Internal Synchronized Slope Compensation ■ Low VDD Startup Current and Low Operating Current ■ Leading Edge Blanking on Current Sense Input ■ Good Protection Coverage With Auto SelfRecovery o VDD Under Voltage Lockout with Hysteresis (UVLO) o Over Temperature Protection (OTP) o On-Bright Proprietary Line Input Compensated Cycle-by-Cycle Over-current Threshold Setting For Constant Output Power Limiting Over Universal Input Voltage Range. o Overload Protection (OLP). o Over voltage Protection(OVP) Output Power Table Product OB2358L 230VAC±15% Open Frame1 27W 85-265VAC Open Frame1 16W Notes: 1. Maximum practical continuous power in an open frame design with sufficient drain pattern as a heat sink, at 50℃ ambient. Higher output power is possible with extra added heat sink or air circulation to reduce thermal resistance. ©On-Bright Electronics Confidential -1- Datasheet OB_DOC_DS_2358LA1 OB2358L Current Mode PWM Power Switch Frequency Shuffling GENERAL INFORMATION Pin Configuration The OB2358L is offered in DIP8 package as shown below. Ordering Information Part Number Description OB2358LAP DIP8, Pb-free Package Dissipation Rating Package DIP8 RθJA (℃/W) 75 Note: Drain Pin Connected to 100mm2 PCB copper clad. Absolute Maximum Ratings Parameter Drain Voltage (off state) VDD Voltage VDD-G Input Voltage FB Input Voltage Sense Input Voltage Maximum Operating Junction Temperature TJ Min/Max Storage Temperature Tstg Lead Temperature (Soldering, 10secs) Value -0.3V to BVdss -0.3V to 30 V -0.3V to 30 V -0.3 to 7V -0.3 to 7V 150℃ -55 to 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. Marking Information ©On-Bright Electronics Confidential -2- Datasheet OB_DOC_DS_2358LA1 OB2358L Current Mode PWM Power Switch Frequency Shuffling TERMINAL ASSIGNMENTS Pin Name GND FB VDD-G SENSE VDD Drain I/O Description P Ground I Feedback input pin. The PWM duty cycle is determined by voltage level into this pin and the current-sense signal at Pin 4. P Internal Gate Driver Power Supply I Current sense input P IC DC power supply Input O HV MOSFET Drain Pin. The Drain pin is connected to the primary lead of the transformer BLOCK DIAGRAM VDD 2 Internal supply 5V RQ S UVLO POR OVP Burst mode RCeuferrreenntce OTP Soft Driver VDD_G 1 Drain 5/6 Power MOSFET OSC Extended Burst mode CPL Vth Soft Start OCP Slope compensation SENSE 4 LEB 5.7V PWM Comparator 50ms OLP 7/8 GND R FB 3 R ©On-Bright Electronics Confidential -3- Datasheet OB_DOC_DS_2358LA1 OB2358L Current Mode PWM Power Switch Frequency Shuffling ELECTRICAL CHARACTERISTICS (TA = 25℃, VDD=16V, unless otherwise noted) Symbol Parameter Test Conditions Min Typ Max Unit Supply Voltage (VDD) Istartup VDD Start Current I_VDD_Operation Operation Current up VDD=11V,Measure Leakage current into VDD VFB=3V 5 20 1.6 uA mA UVLO(ON) VDD Under Voltage Lockout Enter 5.8 6.8 7.8 V UVLO(OFF) VDD Under Voltage Lockout Exit (Recovery) 11.5 12.5 13.5 V OVP(ON) Over voltage protection voltage CS=0V,FB=3V Ramp up VDD until gate clock is off 22.0 23.5 25.0 V Feedback Input Section(FB Pin) VFB_Open VFB Open Loop Voltage IFB_Short FB pin short circuit current Short FB pi.


R5C841 OB2358L B544


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