JW7715同步整流控制器的规格书.pdfJW7715同步整流控制器的规格书pdf,1、支持DCM\

文件名称: JW7715同步整流控制器的规格书.pdf

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详细说明：JW7715同步整流控制器的规格书pdf,1、支持DCM\CrCM,CCM 工作模式 2、适应大部分电源拓扑架构（反激、LLC） 3、快速的驱动能力 4、独特的自适用关断 5、支持高边和你边应用 6、SOT23-6封装15 Rowlatt ORDER INFORMATION TOP Note LEAD FREE FINISH TAPE AND REEL PACKAGE MARKING JWXXXXPPPP#TRPBE JW7715SOTB#PBFJW7715SOTB#TRPBF SOT23-6 」WE3 Part Numberge Coand Reel(If"TR"is not shown, it means Tube) PIN CONFIGURATION TOP VIEW 6SW GND 2 5VO VCCl 3 4MOT SOT23-6 ABSOLUTE MAXIMUM RATING 1) SW PIN 80 VO PIN .30V VCC. GT PIN ,5V Maximum Power Dissipation 0.5W Junction Temperature 150°C Lead Temperature 260°C Storage Temperature… 65°Cto150°C RECOMMENDED OPERATING CONDITIONS SW Pin 47V to 70V VO Pin 4.7V to 20V VCC, GT PIN 4V to 6V Operation Junction Iemp. 40°to125° THERMAL PERFORMANCE4 SOT23-6 220..130°C Note 1)Exceeding these ratings may damage the device 2) TA=25C. The maximum allowable power dissipation is a function of the maximum junction temperature T,(MAX), the unction-to-ambient thermal resistance AJA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by Po(MAX)=(T (MAX)-TA)/0.JA 3 The JW7715 guarantees robust performance from -40C to 150C junction temperature. The junction temperature ange specification is assured by design, characterization and correlation with statistical process controls. 4)Measured on JESD51-7, 4-layer PCB JW7715Rev0.31 JoulWatt Proprietary Information. Patent Protected 3 Unauthorized Photocopy and duplication Prohibited 15 Rowlatt ELECTRICAL CHARACTERISTICS TA= 25C. unless otherwise stated em Symbol Condition Mir Max. Units VCC Section VCC Voltage VCC SW=40V. VCC=2.2uF 5.80 VCC Startup voltage CC Startup 4.05 VCC UVLO VCc uvlo 3.95 Operation Current(Switching) GT=5nF Fsw=100 KHz 32 MA Operation Current(GT On) GT=5nF VCC=22UF 1.0 mA Quiescent Current VCC=4,5V.VCC=22UF 24 A Gate Section Gate Turn on Threshold VMOS ON 300 mV Gate Turn off threshold MOS OFF -10 Gate Turn off threshold in mot VMOS OFF MOT 50 mV Gate Turn on∨ oltage SW=32V. VCC=22uF CC Gate Pull up current GT=1V 0.5 Gate Pull down current GD GT=5V 5.5 RMOT=100K 1.5 US Gate Minimum on Time TMIN ON RMOT=0 Q2 700 nS Gate Minimum off time 550 nS RGatE=OQ, CLOAD=5nF 84 Turn-on total delay DON ns RGATE-OQ, CLOAD=10nF 94 RGatE=0Q, CLOAD=5nF 224 Turn-off total delay T nS RGatE=O Q, CLOAD=10nF 324 SW and vo section VCC Charge Current SW=32V. VCC=3.5V 44 A SW Control Voltage VMOS REG -60 m SW Control Voltage MAX MOS REG MAX 180 r VO Enable Charge Voltage VCC=3V SW=0V VO Disable Charge voltage Vo DIs VCC=3V SW=0V 4.35 SW=OV, VCC=3.5V VO Charge Current IVO CHG A Vo Short-circuit Detection Voltage Vo_sHORT 2.1 JW7715Rev0.31 JoulWatt Proprietary Information. Patent Protected Unauthorized Photocopy and duplication Prohibited 15 Rowlatt PIN DESCRIPTION Pin no Name Description GT Drive the external nmosfet GND Ground 3 Power supply. Bypass a Capacitor Between VCC and GND MOT Set the minimum on-time, floating the pin means 1. 5us Output Voltage Sensing and Charging to Vcc SW External Power MOSFET Drain Voltage Sensing. Charging to vcC BLOCK DIAGRAM Detection UVLO sW凸 H LDO 81 VcC Regulator Voltage Detection Control GNDCH & Driver GT Regulation Logic Minimum off Time Minimum on Time set MOT JW7715Rev0.31 JoulWatt Proprietary Information. Patent Protected 5 Unauthorized Photocopy and duplication Prohibited 15 Rowlatt FUNCTIONAL DESCRIPTION Operation arn on phase JW7715 is a synchronous rectifier controller When the synchronous MOEFET is conducting hich combined with external mosfet can current flows through the body diode of replace the Schottky Barrier Diode. It supports MOSFET, which generates a negative voltage all operations, such as DCM, CrCM Vsw across it. When vsw is lower than vr QQuasi-Resonant) and CCM when adopted in the part will pull the gate high to turn on the flyback or LLC converters synchronous MOSFET after turn on delay time Startup During the startup period, when the VCc is lower than startup voltage, the external MOSFET is turned off. The current flows though 300mV body diode before the Vcc reaches to the Tto startup voltage Vcc startup Under-Voltage Lockout (UVLO) When the vcc is below UVlo threshold. the external MOSFET is turned off and pulled low Figure-1 Turn on delay and turn off delay Iternally. Once the VcC exceeds the startup Conducting Phase voltage Vcc startup, the parts is activated agaIn When the synchronous MOSFET is turn on the drain source voltage Vsw it is determined by its DO Charging Logic on resistance and the current through it. The part adjusts the gate voltage and regulates the JW7715 have two internal ldo to charge the Vsw to a internal threshold(typical -60mV) after VCC pin. When vo is lower than 4.55V the synchronous MoSFet turn on. When the JW7715 can power itself through the intenal Vsw is lower than -60mv, the gate keep its LDO connected to sW pin during the sr turn-off maximum voltage. And the synchronous period, which means primary the primary side MOSFET is fully on MOSFET is turned on and sw presents a The vsw rises when the current follow through positive voltage. A capacitor between VCC and GND is required to store the energy and supply the MOSFET decreases. The gate voltage will be decreased to increase its on resistance and to IC during the sr turn-on period egulate the vsw around-60mV The other internal ldo is connected from vo to VCC, it charges VCC pin when Vo is higher Figure 2 and Figure 3 show the theoretical waveforms when a Flyback converter operated than 4.55V in DCM mode and CCM mode respectively The control circuit contains a minimum on time JW7715Rev0.31 JoulWatt Proprietary Information. Patent Protected Unauthorized Photocopy and duplication Prohibited 15 Rowlatt function. The Vsw voltage may have a parasitic Turn off Phase ng when the synchronous MOSFET turns on So a minimum on time(Mot)is very important After synchronous MOSFET conducting, once to avoid the mosfet turn off threshold is false the voltage Vsw touches the MOSFET turn off triggered. During the minimum time, the gate threshold (-10m), the gate is pulled to low after can still be turned off if vsw touches a positive turn off delay time TDOFF. A 550ns blanking threshold value, +50mV time is necessary to avoid error trigger It should be noted that the typical regulation Minimum on-time( MOT) threshold (-60mv) during MOSFET on time is not fixed, it can be internally changed to ensure MOT stands for the minimum on time of the proper operation under CCM mode synchronous MOSFET or the maximum duty cycle of primary MOSFET, The MOT can be adjusted by a resistor connected to MOT pin The relation between mot and the resistor is shown in Figure 4. Floating MOT Will result in a Vsw maximum on time (-15us), and shorting MOT to GNd turns out to a minimum on time(-700nS 1.mV 60my for high frequency applications IN ON 1.5us}-…………… VGT VGTH → Minimum on time 700nS Figure-2 Conducting phase for DCM mode OR 100K Figure-4 tMOT V.S. RMOT Output voltage detection -1 dmV The JW7715 has output voltage detection -6omV function via vo pin. To avoid the gate error turn on during starting-up period, the whole SR control logic is disabled when the vo voltage is lower than 2.1V. vCC is charged from vo pin VGH when vo is higher than 4. 55v to save power loss caused by the LDo when charging from Figure-3 Conducting phase for CCM mode sW pin to Vcc pin JW7715Rev0.31 JoulWatt Proprietary Information. Patent Protected Unauthorized Photocopy and duplication Prohibited 15 Rowlatt PACKAGE OUTLINE SOT23-6 UNIT: mm 292±020 04±020 0.950BSC 0.15±0.05 190±0.10 JW7715Rev0.31 JoulWatt Proprietary Information. Patent Protected 8 Unauthorized Photocopy and duplication Prohibited 15 Rowlatt IMPORTANT NOTICE Joulwatt Technology Inc. reserves the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein Any unauthorized redistribution or copy of this document for any purpose is strictly forbidden o Joulwatt Technology Inc does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Copynight 2016 Jw7715 Incorporated All rights are reserved by Joulwatt Technology Inc. JW7715Rev0.31 JoulWatt Proprietary Information. Patent Protected Unauthorized Photocopy and duplication Prohibited

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