WS2580 Product Description Low Power Primary Side AC/DC Controller Features General Description � 100mW no-load power The WS2580 is a high performance AC/DC power supply � Lower start-up current controller for battery charger and adapter applications. � PFM mode The device uses Pulse Frequency Modulation (PFM) method � Build-in Leading Edge Blanking to build discontinuous conduction mode (DCM) flyback � Cycle by cycle over current protection (OCP) power supplies. The WS2580 provides accurate constant � Under voltage lockout voltage and constant current (CC/CV) regulation without � ±5% CC、CV Accuracy requiring the opto-coupler and the secondary control � Ultra low standby power (<100mW) circuitry. It also eliminates the need of loop compensation circuitry while maintaining stability. Applications The WS2580 achieves excellent regulation and high power Universal switch power supply equipment and offline efficiency, the no-load power consumption is less than 100mW. AC/DC flyback power converter � Adapters/Chargers for Cell phones, PDAs, MP3 and The WSWS2580 is available in SOT23-6 package. other portable apparatus � LED Driver � Standby and Auxiliary power supplies Typical Application Circuit V+ L N V- 1 2 3 OUT FB GND CPC VCC CS 6 5 4 W/T-Y019-Rev.A/2 May.2014 WINSEM I M ICROELECTRONICS WINSEM I M ICROELECTRONICS Copyright@Winsemi Microelectronics Co., Ltd., All right reserved. WINSEM I M ICROELECTRONICS WINSEM I M ICROELECTRONICS WINSEM I M ICROELECTRONICS 1212 WS2580 Product Description Pin Definition and Device Marking WS2580 is available in SOT23-6 package: OUT 1 6 FB GND 2 5 CPC VCC 3 4 CS 80: WSXX80; Y: Year 2=2012， . 80 YMF M:Month 1,2…A=10,B=11,C=12 F: Factory No. Pin Function Description Pin Name Pin Number Function Description OUT 1 Drive output. Connects to the power MOSFET GND 2 Ground. VCC 3 Power supply. CS 4 Current sense input. CPC 5 Cable voltage compensation input pin, connects to an external filter capacitor FB 6 Feedback input Block Diagram CPC VCC 5 3 Cable 补 偿 6 VD D _ 5 V S O CP FB Q CV R 恒压控制 EA Regulator & B IA S ZC D p fm To n s Dectector p fm D R IV E R 1 OUT TO NS Line 补 偿 恒流控制 Q C C R 2 4 O CP 0 .5 V CS R C滤 波 GND OC P S Pre -OC P 0 .4 V WIN SEM I M ICROELECTRON ICS www.winsemi.com WIN SEM I M ICROELECTRON ICS Tel : +86-755-8250 6288 WIN SEM I M ICROELECTRON ICS Fax : +86-755-8250 6299 WIN SEM I M ICROELECTRON ICS WIN SEM I M ICROELECTRON ICS 2/9 WS2580 Product Description Ordering Information Package IC Marking Information Purchasing Device Name 6 Pin SOT23-6, Pb-free WS2580 WS2580 Recommended Operating Condition Symbol Parameter Value Unit VCC VCC supply voltage 10~30 V TA Operating temperature -20~85 ℃ Absolute Maximum Ratings Parameter Value Unit Supply voltage （VCC） 30 V Feedback voltage （FB） -40~10 V CS，CPC，OUT Voltage -0.3~7 V Internally limited A 150 ℃ Storage temperature -65~150 ℃ Thermal resistance junction-to-ambient 250 ℃/W Output current Operating junction temperature Note 1 ： Stresses greater than those listed under “Absolute Maximum Rating” may cause permanent damage to the device. These are stress ratings only, and 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 Rating” for extended periods may affect device reliability. ESD Information Symbol Parameter Value Unit VESD_HBM Human model 2000 V VESD_MM Machine model 200 V WIN SEM I M ICROELECTRON ICS www.winsemi.com WIN SEM I M ICROELECTRON ICS Tel : +86-755-8250 6288 WIN SEM I M ICROELECTRON ICS Fax : +86-755-8250 6299 WIN SEM I M ICROELECTRON ICS WIN SEM I M ICROELECTRON ICS 3/9 WS2580 Product Description Electrical Characteristics(VCC=15V，TA=25℃if not otherwise noted) Parameter Symbol Conditions Min Typ Max Unit Start-up section Start-up threshold Vstu 17.8 19.4 21 V UVLO threshold Vlo 6 7.5 8.5 V Start-up current Istart VCC=Vstu-0.5V 4 6 uA Operating current IVCC Static 500 700 uA Output current Isourceh Vout=2V 45 50 55 mA Output current， Vcs>Vocp80% Isoutcel Vout=2V 0.3 1.4 1.8 mA Drive output section Current sense section CS compare threshold Vocp 485 500 515 mV 80%CS compare threshold Vocp80% 380 400 420 mV Leading edge blanking Tleb 500 ns Vs&href 4 V Feedback section Feedback threshold voltage WIN SEM I M ICROELECTRON ICS www.winsemi.com WIN SEM I M ICROELECTRON ICS Tel : +86-755-8250 6288 WIN SEM I M ICROELECTRON ICS Fax : +86-755-8250 6299 WIN SEM I M ICROELECTRON ICS WIN SEM I M ICROELECTRON ICS 4/9 WS2580 Product Description Typical Operating Characteristics Vstart VS Temp Vstart( V) 1 8 .6 5 Vstop(V) 7 .5 0 1 8 .6 0 7 .4 5 1 8 .5 5 7 .4 0 1 8 .5 0 7 .3 5 1 8 .4 5 7 .3 0 1 8 .4 0 7 .2 5 1 8 .3 5 7 .2 0 -4 0 0 40 80 120 -4 0 Vstop Vs Temp 0 Temp(°C) Ist V S Tem p Ist(µA) 4 .2 Iop(µA) 80 120 lop V S Tem p 700 630 560 490 3 .6 3 .0 420 350 2 .4 1 .8 280 210 140 1 .2 0 .6 70 0 0 -4 0 0 40 80 120 -4 0 M ICROELECTRON ICS www.winsemi.com WIN SEM I M ICROELECTRON ICS Tel : +86-755-8250 6288 0 40 80 120 Temp(°C) Temp(°C) WIN SEM I 40 Temp(°C) WIN SEM I M ICROELECTRON ICS Fax : +86-755-8250 6299 WIN SEM I M ICROELECTRON ICS WIN SEM I M ICROELECTRON ICS 5/9 WS2580 Product Description Function Description 3、 Constant Voltage Operation 1、 Start-up and UVLO The WS2580 captures the auxiliary winding feedback At the phase of power-on, the rectified high voltage DC voltage at FB pin and operates in constant-voltage (CV) charges the capacitor of VCC through the start-up resistor. mode to regulate the output voltage. Assuming the When VCC rises to 18V, the IC enters normal operation, secondary winding is master, the auxiliary winding is slave then switching begins and the output voltage begins to rise. during the D1 on-time. The auxiliary voltage is given by: The VCC bypass capacitor must supply the IC until the auxiliary winding to sustain the VCC. The under-voltage Vaux Vs = Naux Ns Vs = Vo + Vd threshold of VCC is 7V, and therefore, the voltage on the So, output voltage builds up enough to provide power from the Vaux = VCC capacitor must not drop more than 11V while the Naux ⋅ (Vo + Vd ) Ns R2 ) R3 output is charging up. Vaux = Vu * (1 + 2、 Constant Primary Peak Current Where Vd is the diode forward drop voltage. The primary current ip(t) is sensed by a current sense resistor Rcs, the current rises up linearly at a rate of: dip (t ) Vg (t ) = dt Lm （1） Auxiliary voltage waveform The output voltage is different from the secondary voltage in Primary current waveform a diode forward drop voltage that depends on the current. If As illustrated in top figure，when the current ip(t) rises up to the secondary voltage is always detected at a fixed Ipk, the switch turns off. The constant peak current is given secondary current, the difference between the output by: voltage and the secondary voltage will be a fixed Vd. The Ipk = voltage detection point is at two-thirds of the D1 on-time. Vcs Rcs （2） The CV loop control function of WS2580 then generates a The energy stored in the magnetizing inductance Lm each D1 off-time to regulate the output voltage. cycle is : Eg = 4、 Constant Current Operation 1 × Lm × Ipk 2 2 （3） So the power transferring from the input to the output is given by: P= 1 × Lm × Ipk 2 × f sw 2 Where f sw （4） is the switching frequency. When the peak Secondary current waveform current Ipk is constant, the output power depends on the switching frequency In CC operation, the CC loop control function of WS2580 f sw . will keep a fixed proportion between D1 on-time Tons and D1 WIN SEM I M ICROELECTRON ICS www.winsemi.com WIN SEM I M ICROELECTRON ICS Tel : +86-755-8250 6288 WIN SEM I M ICROELECTRON ICS Fax : +86-755-8250 6299 off-time Toffs WIN SEM I by discharging M ICROELECTRON ICS WIN SEM I or charging the M ICROELECTRON ICS 6/9 WS2580 Product Description capacitance. The fixed proportion is: higher. Tons 4 = Toffs 3 6. Line Compensation The relationship between the output constant-current Iout system CC accuracy in 90-264VAC range. Thus the higher and secondary peak current Ipks is given by: the line voltage, the lower the OCP threshold. By changing Iout = WS2580 build-in line voltage compensation to achieve great 1 Tons × Ipks × 2 Tons + Toffs the resistance of R6, the amount of compensation can be set to achieve better line compensation effect. At the instant of D1 turn-on, the primary current transfers to 7. Leading Edge Blanking the secondary at an amplitude of: Ipks = Np × Ipk Ns When the power switch is turned on, a turn-on spike will occur on the sense-resistor. To avoid false-termination of the Thus the output constant-current is given by: switching pulse, a 500ns leading-edge blanking is built in. 1 Np Tons 2 Np Iout = × × Ipk × = × × Ipk 2 Ns Tons + Toffs 7 Ns During this blanking period, the current sense comparator is 5. Cable Compensation 8. CCM Protection WS2580 detects the duty cycle (Tons/T) of the secondary The WS2580 is designed to operate in discontinuous side using RC filter, which the filtering resistance is built-in; conduction mode (DCM) in both CV and CC modes. To the filter capacitor connects to CPC pin. The larger the avoid operating in continuous conduction mode (CCM), the Tons/Tm， the lager the voltage on CPC pin, which means WS2580 detects the falling edge of the FB input voltage on the greater the load, the IC drags more current from FB pin, each cycle. If a 0.1V falling edge of FB is not detected, the thus through the feedback loop, the output voltage would be WS2580 will stop switching. disabled and the gate driver can not be switched off. . WIN SEM I M ICROELECTRON ICS www.winsemi.com WIN SEM I M ICROELECTRON ICS Tel : +86-755-8250 6288 WIN SEM I M ICROELECTRON ICS Fax : +86-755-8250 6299 WIN SEM I M ICROELECTRON ICS WIN SEM I M ICROELECTRON ICS 7/9 WS2580 Product Description Package Information SOT23-6 Package Outline Dimensions U n it:m m A C2 B1 B θ1 θ B2 A2 R C D R1 θ2 C1 θ3 R2 D1 D3 D2 A1 Winsemi Dimensions in Millimeters Symbol Dimensions in Inches Min Max Min Max A 2.72 3.12 0.107 0.123 B 1.40 1.80 0.055 0.071 C 1.00 1.20 0.039 0.047 A1 0.90 1.00 0.035 0.039 A2 0.30 0.50 0.012 0.020 B1 2.60 3.00 0.102 0.118 B2 0.119 0.135 0.005 0.005 C1 0.03 0.15 0.001 0.006 C2 0.55 0.75 0.022 0.030 D 0.03 0.13 0.001 0.005 D1 0.30 0.60 0.012 0.024 D2 0.25TYP D3 WIN SEM I 0.60 M ICROELECTRON ICS www.winsemi.com WIN SEM I 0.70 M ICROELECTRON ICS Tel : +86-755-8250 6288 0.01TYP WIN SEM I M ICROELECTRON ICS Fax : +86-755-8250 6299 0.024 WIN SEM I M ICROELECTRON ICS 0.028 WIN SEM I M ICROELECTRON ICS 8/9 WS2580 Product Description NOTE: 1.We strongly recommend customers check carefully on the trademark when buying our product, if there is any question, please don't be hesitate to contact us. 2.Please do not exceed the absolute maximum ratings of the device when circuit designing. 3.Winsemi Microelectronics Co., Ltd reserved the right to make changes in this specification sheet and is subject to change without prior notice. CONTACT: Winsemi Microelectronics Co., Ltd. ADD:Room 1002, East, Phase 2, HighTech Plaza,Tian-An Cyber Park,Chegongmiao, FuTian, Shenzhen, P.R. China Post Code : 518040 Tel : +86-755-8250 6288 FAX : +86-755-8250 6299 Web Site : www.winsemi.com WIN SEM I M ICROELECTRON ICS www.winsemi.com WIN SEM I M ICROELECTRON ICS Tel : +86-755-8250 6288 WIN SEM I M ICROELECTRON ICS Fax : +86-755-8250 6299 WIN SEM I M ICROELECTRON ICS WIN SEM I M ICROELECTRON ICS 9/9