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1、 On-Bright Electronics Confidential Preliminary Datasheet OB_DOC_DS_526902 - 1 - OB5269 High Voltage Green Mode PWM Controller GENERAL DESCRIPTION OB5269 is a highly integrated current mode PWM control IC with high voltage start up, optimized for high performance, low standby power consumption and c
2、ost effective offline flyback converter applications. PWM switching frequency at normal operation is internally fixed and is trimmed to a tight range. At no load or light load condition, the IC operates in extended burst mode to minimize switching loss. Very low standby power consumption and very hi
3、gh conversion efficiency is thus achieved. High voltage startup is implemented in OB5269, which features with short startup time and low standby current. OB5269 offers complete protection coverage with auto-recovery including Cycle-by-Cycle current limiting (OCP), over load protection (OLP), and VDD
4、 under voltage lockout (UVLO). It also provides the protections with latched shut down including over temperature protection (OTP), and over voltage (fixed or adjustable) protection (OVP). Excellent EMI performance is achieved with On- Bright proprietary frequency shuffling technique. The tone energ
5、y at below 22KHZ is minimized to avoid audio noise during operation. OB5269 is offered in SOP8 package. FEATURES High Voltage Startup Power on Soft Start Reducing MOSFET Vds Stress Frequency shuffling for EMI Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power Audio Noise F
6、ree Operation Fixed 65KHZ Switching Frequency Comprehensive Protection Coverage o VDD Under Voltage Lockout with Hysteresis (UVLO) o Cycle-by-cycle over current protection (OCP) o Overload Protection (OLP) with auto- recovery o Over Temperature Protection (OTP) with latch shut down o VDD Over voltag
7、e Protection(OVP) with latch shut down o Adjustable OVP through external Zener APPLICATIONS Offline AC/DC flyback converter for Battery Charger Power Adaptor Open-frame SMPS TYPICAL APPLICATION 张高琨 1 3 7 6 0 1 6 0 5 7 0 On-Bright Electronics Confidential Preliminary Datasheet OB_DOC_DS_526902 - 2 -
8、OB5269 High Voltage Green Mode PWM Controller GENERAL INFORMATION Pin Configuration The OB5269 is offered in SOP8 package, shown as below. RT FB CS GND HV NC VDD GATE OB5269 1 2 3 45 6 7 8 Ordering Information Part Number Description OB5269CP SOP8, Pb-free OB5269CPA SOP8, Pb-free in Taping Package D
9、issipation Rating Package R JA(/W) SOP8 150 Absolute Maximum Ratings Parameter Value VDD DC Supply Voltage 30V High-Voltage Pin, HV -0.3 to 500 V VDD Zener Clamp VoltageNote VDD_Clamp+0.1V VDD DC Clamp Current 10 mA FB Input Voltage -0.3 to 7V CS Input Voltage -0.3 to 7V RT Input Voltage -0.3 to 7V
10、Min/Max Operating Junction Temperature TJ -40 to 150 Min/Max Storage Temperature Tstg -55 to 160 Lead Temperature (Soldering, 10secs) 260 Note: VDD_Clamp has a nominal value of 32V. Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stre
11、ss 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. OB5269 X X X Current Mode PWM Control
12、ler with HV Startup Package C:SOP8 Package Pb free P:lead-free Packing Blank:Tube A:Taping 张高琨 1 3 7 6 0 1 6 0 5 7 0 On-Bright Electronics Confidential Preliminary Datasheet OB_DOC_DS_526902 - 3 - OB5269 High Voltage Green Mode PWM Controller Marking Information YWWZZZ OB5269CP S Y:Year Code WW:Week
13、 Code(01-52) ZZZ:Lot Code C:SOP8 Package P:Pb-free Package S:Internal Code(Optional) TERMINAL ASSIGNMENTS Pin Num Pin Name I/O Description 1 RT I Dual function pin. Either connected through a NTC resistor to ground for over temperature shutdown/latch control or connected through Zener to VDD for adj
14、ustable over voltage protection 2 FB I Feedback input pin. The PWM duty cycle is determined by voltage level into this pin and the current-sense signal at CS pin 3 CS I Current sense input 4 GND P Ground 5 Gate O Totem-pole gate driver output for power Mosfet 6 VDD P Power Supply 8 HV P Connected to
15、 the line input or bulk capacitor via resistors for startup RECOMMENDED OPERATING CONDITION Symbol Parameter Min/Max Unit VDD VDD Supply Voltage 12 to 23.5 V TA Operating Ambient Temperature -20 to 85 张高琨 1 3 7 6 0 1 6 0 5 7 0 On-Bright Electronics Confidential Preliminary Datasheet OB_DOC_DS_526902 - 4 - OB5269 High Voltage Green Mode PWM Controller BLOCK DIAGRAM VDD 6 VDD 6 OVP CSCS3 FB 3 FB2 2 R OLP GNDGND PWM Comparator CPL OSC Extended Burst mode R S Q Internal supply Burst mode UVLO Slope compensation OCP 5V Vth LDO PORbPORb Debounce R LEB Soft Driver Soft Start Logic Control C
