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OB2223F Dataheets PDF



Part Number OB2223F
Manufacturers On-Bright Electronics
Logo On-Bright Electronics
Description High Precision Low Cost MCM Power Switch
Datasheet OB2223F DatasheetOB2223F Datasheet (PDF)

OB2223F High Precision Low Cost MCM Power Switch GENERAL DESCRIPTION OB2223F is a high performance, high precision and low cost PWM Power switch for non-isolated buck and flyback application. It combines a dedicated current mode PWM controller (with a high voltage power MOSFET with SOP8/DIP7 package) and built-in error amplifier optimized for good overshoot and dynamic response for low cost and component count. With precise inner resistor divider, precise reference of EA , accurate constant vol.

  OB2223F   OB2223F


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OB2223F High Precision Low Cost MCM Power Switch GENERAL DESCRIPTION OB2223F is a high performance, high precision and low cost PWM Power switch for non-isolated buck and flyback application. It combines a dedicated current mode PWM controller (with a high voltage power MOSFET with SOP8/DIP7 package) and built-in error amplifier optimized for good overshoot and dynamic response for low cost and component count. With precise inner resistor divider, precise reference of EA , accurate constant voltage regulation 12V at universal AC input can be guaranteed. For high efficiency, oscillator with frequency-reduction and burst mode control is implemented. And EMI performance is achieved with On-Bright proprietary frequency shuffling technique and soft gate driver design. OB2223F offers power on soft start control and protection coverage with auto-recovery features including Cycle-by-Cycle current limiting, Over Loading Protection, Output Short-Circuit Protection, On-Chip OTP,VDD OVP, and UVLO. TYPICAL APPLICATION FEATURES • Low cost and component count buck application • Current Mode Control • Multiple mode control with good dynamic response • Oscillator of fixed maximum switching frequency with frequency-reduction and burst mode control for high efficiency • Frequency shuffling for EMI improvement • Power on Soft-start • Built-in Leading Edge Blanking (LEB) • Cycle-by-Cycle Current Limiting • Over Loading Protection • Output Short-Circuit Protection • VDD Under Voltage Lockout with Hysteresis (UVLO) • VDD OVP • On-Chip OTP APPLICATIONS Low Power AC/DC offline SMPS for • Electrical Appliance • Linear Regulator/RCC Replacement OB2223F is offered in SOP8/DIP7 package. AC IN OB2223F 1 VDD GND 8 2 COMP GND* 7 3 ENB DRAIN 6 4 CS DRAIN 5 Note : GND* Only in SOP8 package ©On-Bright Electronics Confidential -1- DC OUT Preliminary Datasheet OB_DOC_DS_2223F00 OB2223F High Precision Low Cost MCM Power Switch GENERAL INFORMATION Pin Configuration The pin map is shown as below for SOP8/DIP7 VDD 1 8 GND COMP 2 ENB 3 SOP 7 6 GND DRAIN CS 4 5 DRAIN VDD 1 7 GND COMP 2 ENB 3 DIP 6 DRAIN CS 4 5 DRAIN Ordering Information Part Number Description OB2223FCP SOP8, Pb-free, Tube OB2223FCPA SOP8, Pb-free, T&R OB2223FAP DIP7, Pb-free, Tube Package Dissipation Rating Package RθJA (℃/W) SOP8 90 DIP7 75 Note: Drain Pin Connected 100mm2 PCB copper clad. Absolute Maximum Ratings Parameter Value Drain Voltage (off state) -0.3V to Bvdss VDD Voltage -0.3 to 40V VDD Zener Clamp Continuous Current 10 mA COMP Voltage -0.3 to 7V CS Input Voltage -0.3 to 7V ENB Voltage -0.3 to 7V Min/Max Operating Junction Temperature TJ Min/Max Storage Temperature Tstg Lead Temperature (Soldering, 10secs) -40 to 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. ©On-Bright Electronics Confidential -2- Preliminary Datasheet OB_DOC_DS_2223F00 Marking Information OB2223F High Precision Low Cost MCM Power Switch TERMINAL ASSIGNMENTS Pin Num 1 2 3 4 5/6 7 8 Pin Name VDD COMP ENB CS DRAIN GND GND I/O Description P Power Supply and Output Voltage Feedback I Compensation Pin. Connect a Cap to GND I Connected to GND for 12V output I Current sense input O HV MOSFET Drain Pin. The Drain pin is connected to the primary lead of the transformer / inductance. P Ground P Ground (Only in SOP8 package) ©On-Bright Electronics Confidential -3- Preliminary Datasheet OB_DOC_DS_2223F00 BLOCK DIAGRAM OVP OB2223F High Precision Low Cost MCM Power Switch Note: GND* only in SOP8 package ©On-Bright Electronics Confidential -4- Preliminary Datasheet OB_DOC_DS_2223F00 OB2223F High Precision Low Cost MCM Power Switch ELECTRICAL CHARACTERISTICS (TA = 25℃, VDD=16V, if not otherwise noted) Symbol Parameter Test Conditions Min Supply Voltage (VDD) Section I DD ST Standby Current VDD=UVLO(off) -1V I DD op Operation Current Operation supply current CS=0V, VDD=12V - Operation supply current CS=0V, VDD=12V, CL=0.5nF UVLO(ON) VDD Under Voltage Lockout Enter VDD falling 6.0 UVLO(OFF) VDD Under Voltage Lockout Exit VDD rising 11.5 OVP Over voltage protection Ramp VDD until gate Threshold shut down 23 Vpmos Pull-up PMOS Active CS=0V,Comp=3V VDD Regulation Voltage In normal regulation, VDD will be regulated to 12.5V Ramp VDD until Comp voltage lower than 2.5V 12.0 Current Sense Input Section TLEB LEB time Vth_oc Over current threshold 890 Td_oc OCP Propagation delay ZSENSE_IN Input Impedance Frequency Section Freq_MaxNote 1 IC Maximum frequency 50 27 △f/Freq Frequency shuffling range F_shuffling Shuffling f.


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