công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
FQP7N60 bảng dữ liệu(PDF) 3 Page - Fairchild Semiconductor |
|
FQP7N60 bảng dữ liệu(HTML) 3 Page - Fairchild Semiconductor |
3 / 9 page 3 Rev D, July 2000 Performance in a Flyback Converter Figure 3 shows the design of a commercially available 60 watt flyback converter with two outputs (+160V, +15V), operating at a switching frequency of 80kHz and an input voltage of 220VAC. This type of switching power supply is used for applications, such as monitors, TVs, and miscellaneous instruments, requiring multiple output voltages . This discontinuous mode flyback converter, using a KA3882 current mode controller, features good voltage tracking with the use of pulse by pulse current sensing on the primary side, and an isolated secondary feedback loop. The PWM IC KA3882 directly drives the power MOSFET. As the power MOSFET sequentially turns on and off, energy is stored in the transformer core dur- ing the on time, and is then transferred to the output capacitor during the off time. When the power MOSFET turns off, the energy stored in the leakage inductance causes a voltage spike across the drain-to-source terminal of the power MOSFET, which amounts to at least twice the input voltage (Vin + nVo + leakage inductance voltage1). Most applications need clamp circuits to restrict this voltage spike from exceeding the BVdss rating of a MOSFET. A power MOSFET must have high voltage capability with lower on-resistance and smaller gate charge for higher efficiency. Figure 3: Flyback Converter Circuit Diagram 1. 'n' indicates a turns ratio of the transformer windings. The voltage of Vin + nVo + leakage inductance voltage of the transformer appears at the primary side. 7 8 6 3 5 2 1 4 L1 D1 T1 Fuse U1 U2 U3 Q1 Vout1 Vout2 QFET(FQP7N60) or Conventional MOSFET Vin=220VAC 1 2 3 C1 1 2 C4 C2 C3 C5 R2 R1 1 2 R3 1 R5 C6 R14 D3 1 2 C10 C9 R11 1 2 D4 1 2 R11 1 2 R13 D5 C8 R10 C7 R9 R6 R7 R8 R19 R20 2 D7 1 2 C13 R14 R16 R17 1 2 C14 D2 1 2 C11 R4 C12 R18 1 5 4 8 D6 1 2 5V 0.8A 160V 0.3A |
Số phần tương tự - FQP7N60 |
|
Mô tả tương tự - FQP7N60 |
|
|
Link URL |
Chính sách bảo mật |
ALLDATASHEET.VN |
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không? [ DONATE ] |
Alldatasheet là | Quảng cáo | Liên lạc với chúng tôi | Chính sách bảo mật | Trao đổi link | Tìm kiếm theo nhà sản xuất All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |