SY7304DBC產品品牌-產品參數-產品手冊

SY7304DBC產品品牌

　　矽力杰（Silergy）是一家專注于設計和制造高性能模擬和混合信號集成電路的品牌。該公司致力于為客戶提供高品質、創新的解決方案，涉及電源管理、LED驅動器、電池管理等領域。矽力杰產品以其高效能耗、穩定性強和先進的集成特性而備受認可，并在消費類電子產品、工業設備及汽車電子等領域得到廣泛應用。

　　總部位于美國加州，矽力杰在全球范圍內設有研發團隊、銷售網絡以及技術支持服務，以滿足客戶需求并與之合作定制解決方案。作為一家技術導向型企業，該品牌不斷投入研發，并致力于滿足各種應用領域對高性能集成電路的需求。

　　綜上所述，矽力杰是一家注重創新和可靠性的模擬和混合信號集成電路品牌，在行業中具有良好聲譽。

SY7304DBC產品參數

　　商品參數

　　商品目錄DC-DC電源芯片

　　功能類型升壓型

　　輸入電壓3V~33V

　　輸出電壓600mV~33V

　　輸出電流4A

　　開關頻率1MHz

　　屬性參數值

　　工作溫度-40℃~+125℃

　　同步整流否

　　輸出通道數1

　　拓撲結構升壓式

　　開關管(內置/外置)內置

SY7304DBC產品手冊

　　Applications Information Because of the high integration in SY7304, the application circuit based on this regulator IC is rather simple. Only input capacitor C , output capacitor C , 1) Choose the inductance to provide the desiredripple current. It is suggested to choose the ripplecurrent to be about 40% of the maximumaverageinput current. The inductance is calculated as: ? VIN ? 2 (VOUT ?VIN) IN OUT L ? ? ? (H) inductor L and feedback resistors (R1 and R2) need to be selected for the targeted applications. ? VOUT ? FSW ? IOUT_MAX ? 40%Feedback resistor divider R1 and R2 Choose R1 and R2 to program the proper output voltage. To minimize the power consumption under light load, it is desirable to choose large resistance values for both R1 and R2. A value between 10k and 1M is recommended for both resistors. If R1=200k is chosen, then R2 can be calculated to be: where FSW is the switching frequency and IOUT_MAXis the maximum load current. SY7304 regulator IC is less sensitive to the ripplecurrent variations. Consequently, the final choice of inductance can be slightly off the calculation valuewithout significantly impacting the performance. R 2 ? 0.6R1 VOUT ? 0.6 (?) 2) The saturation current rating of an inductor must be selected to guarantee an adequate margin tothepeak inductor current under full load conditions. ? VOUT ? ? VIN ? 2 (VOUT ?VIN) ISAT_MIN ? ? ?? IOUT_MAX ? ? ?? VIN ? ? VOUT ? 2 ?FSW?LInput capacitor CIN The ripple current through input capacitor is calculated as: 3) The DCR of the inductor and the core loss at theswitching frequency must be lowenoughtoachieve the desired efficiency requirement. It isdesirable to choose an inductor with DCR<10m?to achieve a good overall efficiency. ICIN_RMS ? VIN ? (VOUT ? VIN) (A) Enable Operation Pulling the EN pin low (<0.4v) will="" shut="" downthedevice.="" during="" the="" down="" sy7304shut="" current="" drops="" to="" lower="" than="" a.="" driving="" minimize="" potential="" noise="" place="" a="" typical="" x5r="" or="" better="" grade="" ceramic="" capacitor="" really="" close="" in="" and="" gnd="" pins.="" care="" should="" be="" taken="" loop="" area="" formed="" by="" low="" esr="" with="" greater="" 10uf="" capacitance="" is="" recommended.="" output="" cout="" selected="" handle="" ripple="" requirements.="" both="" steady="" state="" transient="" requirements="" must="" into="" account="" when="" selecting="" this="" capacitor.="" for="" best="" it="" recommended="" use="" 22uf="" capacitance.="" boost="" inductor="" l="" there="" are="" several="" considerations="" choosing="" inductor.="" en="" pin="" high="">2V) will turn on the IC again. Rectifier Diode Selection Schottky diode is a good choice for high efficiencyoperation because of its low forward voltage dropandfast reverse recovery. The maximumcurrent ratingof the diode must be higher than maximuminput current. And the average current rating of the diode must behigher than the output current. Layout Design The layout design of SY7304 regulator is highlysimplified. To achieve a higher efficiency and better noise immunity, following components should beplaced close to the IC: CIN, L, R1 and R2. 1) It is desirable to maximize the PCBcopper areaconnecting to GND pin to achieve better thermal