công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
TDA16847-2 bảng dữ liệu(PDF) 8 Page - Infineon Technologies AG |
|
TDA16847-2 bảng dữ liệu(HTML) 8 Page - Infineon Technologies AG |
8 / 29 page TDA 16846/16846-2 TDA 16847/16847-2 Version 2.0 8 31 Jul 2003 2 Functional Description Start Up Behaviour (Pin 14) When power is applied to the chip and the voltage V 14 at Pin 14 (VCC) is less than the upper threshold ( V ON) of the Supply Voltage Comparator (SVC), then the input current I 14 will be less than 100 µA. The chip is not active (off state) and driver output (Pin 13) and control output (Pin 4) will be actively held low. When V 14 exceeds the upper SVC threshold ( V ON) the chip starts working and I14 increases. When V14 falls below the lower SVC threshold ( V OFF) the chip starts again from its initial condition. Figure 4 shows the start-up circuit and Figure 5 shows the voltage V 14 during start up. Charging of C14 is done by resistor R 2 of the “Primary Current Simulation” (see later) and the internal diode D1, so no additional start up resistor is needed. The capacitor C 14 delivers the supply current until the auxiliary winding of the transformer supplies the chip with current through the external diode D14. It is recommended to apply a small RF snubber capacitor of e.g. 100 nF parallel to the electrolytic capacitor at pin 14 as shown in the application circuits in Figures 15, 16 , and 17. To avoid multiple pulses during start up in fixed frequency mode (danger of transformer saturation), the IC works in freerunning mode until the pulses at pin 3 (RZI) exceed the 2.5 V threshold (only TDA 16846-2, TDA 16847-2). Figure 4 Startup Circuit |
Số phần tương tự - TDA16847-2 |
|
Mô tả tương tự - TDA16847-2 |
|
|
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 |