WS2293 Product Description WS2293 Switch Power Supply PWM Controller Features � Extended burst mode control for improving efficiency and minimum standby power the standby power and higher RoHS compliant, the IC has the � Low startup current (4uA) Burst Mode function and very low startup current and working � Low operation current (1.7mA) current. At the condition of no load or light load, the IC � 0.8mA operation current at noload operates in extended ‘burst mode’ to minimize switching loss � Wide operation voltage (7.5-34V) by lower the switching frequency. The low startup current and � Advanced frequency jitter control low operating current contribute to a reliable power on startup � Built in Leading edge blanking (LEB) design with WS2293. A large value resistor could thus be used � Built in Synchrnous slope compensation in the startup circuit to minimize the power consumption and � Current mode operates improve the efficiency of the power convert. � External programmable switching frequency WS2293 covers wide supply voltage(7.5-34V),which helps � Cycle by cycle Over Current Protection (OCP) easing the transform design ; WS2293 applies advanced � CS open protection frequency jitter control to improve EMI performance at � over temperature protection(OTP) mid-load and light-load � Soft-start (4ms) The � VDD over voltage protection and clamp improves system large signal stability and reduces the � under voltage lockout with hysteresis(UVLO) possible subharmonic oscillation at high PWM duty cycle � Driver Output clamped(13V) output. Leading-edge blanking on current sense(SENSE) � Soft-driver function for lower EMI input removes the signal glitch due to snubber circuit diode � Frequency jitter reverse recovery and thus greatly reduces the external � Constant output power limited (90-264VAC) component count and system cost in the design. WS2293 � Over load protection(OLP) offers � Free audio noise operation self-recovery feature including cycle by cycle over current internal complete protection (OCP), over coverage load with protection circuit automatic (OLP), over clamped to maximum 13V to protect the external MOSFET. flyback converter:: Excellent EMI performance is achieved by using the frequency � Battery Charger � Power Adaptor � Set-Top Box Power Supplies � Open-frame SMPS Jitter and the soft-switching 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. The IC can be used as the best alternative products of the linear power General Description WS2293 which is optimized for high performance is a highly integrated current mode PWM control IC. It is switch protection compensation under voltage lockout (UVLO). The gate-driven output is Universal switch power supply and offline AC/DC for slope temperature protection (OTP), VDD Over Voltage Protection, Applications applied synchronous power of the small-sized and supply or the RCC-mode power to improve the whole performance of the switch power system and lower the cost. WS2293 is offered in SOT23-6 package. medium-sized for example the power adaptor. For lower W/T-Y029-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 1113 WS2293 Product Description Typical Application Circuit V+ L EM I Filter N V- 1 G N D G a te 6 2 FB VDD 5 3 R I Se n se 4 Pin Definition and Device Marking WS2293 is offered in SOT23-6,as shown below: 1 SO T23-6 6 GND G AT E 93:WS2293 2 5 S O T2 3-6 FB Y:Year Code(0-9) VDD 3 . 93 YMF 4 RI M:Month Code(1-12) F: Factory No. S E NS E Pin Function Description Pin Name Pin No. /SOT23-6 DIP8 DIP8/SOT23-6 Pin Type Function Description GATE 6 Output Totem-pole gate drive output for the power MOSFET VDD 5 Power Power Supply SENSE 4 Current Current sense input. Monitoring RI FB 3 2 Frequency Internal oscillator frequency setting pin. A resistor which is Setting connected between RI and GND sets the PWM frequency Feedback Input GND 1 Ground Feedback input pin. The PWM duty cycle is determined by voltage into this pin and the current-sense signal at Pin 4 Ground W/T-Y029-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 1113 WS2293 Product Description Block Diagram GND VDD 5. 5V Internal supply UVLO VDD _ OVP VDD _ low OSC RI VDD_ low OLP Logic Burst mode FB L o g ic Soft driver G AT E VDD_ low PW M S lo p e SENSE com p LEB OCP Soft start OTP Ordering Information Package IC Marking Information Purchasing Device Name 6-Pin SOT23-6, Pb-free 93YMF WS2293YP(SOT23-6) Recommended Operating Condition Symbol Parameter Value Unit VDD Supply Voltage 10~30 V 100 Kohm -20~85 ℃ Value Unit 34.5 V FB input voltage -0.3~7 V SENSE input voltage -0.3~7 V VRI RI input voltage -0.3~7 V TJ Operation Junction Temperature -20~150 ℃ TSTG Storage Temperature -40~150 ℃ VCV Vcc Clamp Voltage 35.5 V ICC Vcc Clamp Continuous Current 10 mA VDD RI RI Resistor TA Operating temperature Absolute Maximum Ratings Symbol Parameter VDD DC Power Supply VFB VSENSE Note 1: Stresses above 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 in the Recommended Operating Conditions section are not implied. Exposure to absolute maximum-rated conditions for extended periods may affect device reliability. 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 3/10 WS2293 Product Description ESD Information Symbol Parameter VESD-HBM Human body model on all pins VESD-MM Machine model on all pins Value Unit 3 KV 300 V Electrical Characteristics (Unless otherwise specified,TA=25℃,VCC=16V) Symbol Parameter Test conditions Min Typ Max Unit 34 V Supply Voltage (VDD) VDD_OP Operation voltage UVLO_ON Turn on threshold Voltage 7.5 8.5 9.5 V UVLO_OFF Turn-off threshold Voltage 14.5 15.5 16.5 V I_VDD_ST Start up current 4 10 uA I_VDD_OP Operation Current 1.7 2.5 mA VDD=13V,RI=100K VDD=16V,RI=100K,VFB=3V GATE with 1nF to GND VDD_OVP VDD_Clamp VDD Zener Clamp Voltage IVDD=10mA 34.5 V 35.5 V Feedback Input Section VFB_Open VFB Open Loop Voltage VDD=16V,FB open, 4.3 5.0 5.6 V IFB_Short FB Pin Short Current FB Shorted to GND 0.22 0.315 0.41 mA VTH_PL Power limiting FB Threshold VDD=16V, RI=100K 3.2 3.65 4.0 V TD_PL Power limiting Debounce VDD=16V,FB open,RI=100KΩ 48 60 72 ms ZFB_IN Input Impedance VDD=16V,FB=2V/3V,CS open 13 16.5 20 kΩ Max_Duty Maximum duty cycle VDD=16V,FB open, CS=0,RI=100KΩ 72 77 82 % Current Sense Section TLEB Leading edge Blanking Time 330 ns TD_OCP OCP control delay GATE with 1nF to GND 70 ns VTH_OCP OCP threshold FB=3.4V 0.690 0.740 0.790 V Max_OC Max_OCP for line comp FB=3.4V 0.9 0.95 1 V VDD=16V,RI=100K,,FB=3.2V 60 65 70 khz Oscillator Section Fosc Frequency Jitter period For 65K 4 ms ±5 % VDD=9.5V,RI=100K, FB=1V 22 khz TEMP = -20 to 85℃ 5 % VDD = 12 to 25V 5 % 150 ℃ Jitter range Fosc_BM Burst mode frequency Frequency variation versus ∆f_temp temp. Deviation ∆f_VDD Frequency variation versus VDD Thermal protection T_shutdown WIN SEM I Thermal shutdown temperature 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 4/10 WS2293 Product Description GATE Output Section VOL Output voltage Low VDD = 16V, Io = -20mA VOH Output voltage high VDD = 16V, Io = 20mA 9 VClamp Output clamp voltage VDD = 20V 11 Tr Rising time VDD = 16V, GATE with 1nF to GND 250 ns Tf Falling time VDD = 16V, GATE with 1nF to GND 75 ns 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 0.8 M ICROELECTRON ICS V V 13 WIN SEM I 14.5 V M ICROELECTRON ICS 5/10 WS2293 Product Description Typical Operating Characteristics UVLO(OF F )vs Temperature 1 5 .6 5 8 .6 5 8 .6 0 UVLO( OFF)(V) UVLO (ON)( V) UVLO(ON)vs Temperature 8 .5 5 8 .5 0 8 .4 5 8 .4 0 1 5 .6 0 1 5 .5 5 1 5 .5 0 1 5 .4 5 1 5 .4 0 -2 5 5 35 65 95 125 -2 5 5 Temperature(°C) 35 65 95 125 Temperature(°C) IVDD_startup vs VDD IV D D vs V D D 1.2 IVDD_start up(µA) IV DD(µA ) 1 0.8 0.6 0.4 0.2 0 20 15 10 5 0 0 10 20 30 0 2 4 VDD(V) 6 8 10 12 14 VDD(V) F o sc vs Te m p e r a tu r e 6 5 .5 5 4 6 5 .0 5 0 KH z 3 2 Fosc(KHz) I_Vdd (mA) I_Vdd vs Gate load 6 5 KH z 1 0 0 KHz 1 0 6 4 .5 6 4 .0 6 3 .5 6 3 .0 6 2 .5 0 5 0 0 1000 1500 2000 6 2 .0 -2 5 load(pF ) 5 35 65 95 125 Te m p e r a tu r e ( ° C ) 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 6/10 WS2293 Product Description Function Description operates, the peak current is then gradually increased from WS2293 is a highly integrated current mode PWM control IC zero. Every restart attempt is followed by 4ms soft-start. which is optimized for high performance. It is applied for switch power of the small-sized and medium-sized for Burst Mode example the power adaptor. The low startup current, At very light load or no load condition, the IC operates in operation current and burst mode function at the condition of no load and low load can decrease the standby power of the Burst Mode. In this condition, the voltage at FB is below system, and improve the power convert efficiency. The burst mode threshold level, thus system goes into burst internal synchronous slope compensation, the leading edge mode. The gate dive output switches only when VCC blanking function of the Sense pin not only decrease the voltage drops below a preset level or FB input is active to component number, but also improve the stability of the output an on state. Otherwise the gate drive remains at off system and avoid the harmonics generation. WS2293 also state to minimize the switching loss thus reduce the standby have multiform general recovery protection mode. The main power consumption. The frequency control also eliminates function is described as below.。 the audio noise at any loading conditions. Startup Current and Startup Control Startup current of WS2293 is designed to be very low(4uA) so that VDD could be charged up above UVLO threshold level and starts up quickly. A large value startup resistor can therefore be used to minimize the power loss, predigest the design of startup circuit and provides reliable startup in application. For the design of AC/DC adaptor with universal Oscillator Operation A resistor connected between RI and GND sets the charge/discharge time of the constant current source to the internal cap and thus the PWM oscillator frequency is determined. The relationship between RI and switching frequency follows the below equation: input range, a startup resistor of 2 MΩ, 1/8 W could be used FOSC = together with a VDD capacitor to provide a fast startup and low power dissipation solution. 6500 (Khz ) RI(Kohm ) Advanced frequency jitter control The frequency jitter range is in proportion to the switching Wide operating voltage frequency in traditional PWM controller,so that, at mid-low or WS2293 covers wide supply voltage from 7.5V to 34.5V, light-low, the switching frequency is decreased, and the which helps easing the transform design, and a same frequency jitter range is also decreased, which deteriorates transform can be used to design different output voltage, so the EMI performance. WS2293 applies advanced frequency jitter control to keep well EMI performance at all load that the compatibility is improved condition. Operating Current The operating current of WS2293 is very low .Good efficiency is achieved with low operating current together with extended burst mode control circuit which can easy the design of VDD capacitor. WS2259 WS2293 Soft-start As soon as VDD reaches UVLO(on), the soft-start function 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 7/10 WS2293 Product Description Current Sensing and Leading Edge Blanking power switch. The gate drive strength which is too weak Cycle-by-Cycle current limiting is offered in WS2293. The leads to over switch loss of MOSFET while too strong gate switch current is detected by a sense resistor into the drive output compromises in the over EMI. A good tradeoff SENSE pin. The internal Leading-edge blanking chops off between output strength and dead time control is achieved the sense voltage spike at initial MOSFET on state due to through the design of the built-in totem pole gate in WS2293. snubber diode circuit reverse recovery and thus reduce the The low standby dissipation and good EMI system design is external RC filter circuit. The current limit comparator is easier to achieve through this dedicated devise. For disabled and cannot turn off the external MOSFET during MOSFET gate protection, an internal 13V clamp is added at the blanking period. PWM duty cycle is determined by higher than expected VCC input. voltage level into SENSE pin and FB pin. Protection Controls Internal Synchronized Slope Compensation Good power supply system reliability is achieved with Built-in slope compensation circuit adds slope voltage onto auto-recovery protection features including Cycle-by-Cycle the current sense input voltage for PWM generation. This current limiting (OCP), Over Load Protection (OLP), CS greatly improves the close loop stability at CCM and open protection, Under Voltage Lockout on VDD (UVLO), prevents the sub-harmonic oscillation and thus reduces the Over Temperature Protection (OTP), and VDD over Voltage output ripple voltage. Protection & VDD clamp. Internal line voltage compensation of OCP helps to achieve Gate Driver constant output power limit over the universal input voltage GATE pin of WS2293 is connected to the gate of an external range. 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 8/10 WS2293 Product Description SOT23-6 封装外观图 A C2 B1 B θ1 θ B2 A2 R θ3 C D R2 R1 C1 θ2 D2 A1 D1 D3 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 9/10 WS2293 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 10/10