The pin is detecting the rectified sine waveform peak value of input voltage 4 CS Primary current sensing 5 FB This pin captures the feedback voltage from the auxiliary winding. In a half line cycle, the operation parameters, such like DC bus voltage, primary peak current, duty cycle, etc. W3 Secondary Winding Start at white terminal. The primary OCP comparator 4. FB voltage is used to control no load output voltage and determine acceleration stop point at start-up phase. As shown in Figure 5 and Figure 6, comparing to the Flyback application, the Buck-Boost converter has only inductor instead of transformer, has not primary snubber circuit.
|Date Added:||8 May 2007|
|File Size:||27.26 Mb|
|Operating Systems:||Windows NT/2000/XP/2003/2003/7/8/10 MacOS 10/X|
|Price:||Free* [*Free Regsitration Required]|
Data sheet, Pin configuration, Pin description – Diodes AP1682 User Manual
The rectified input voltage peak value sensing pin. The rectified input voltage peak value sensing pin.
To reduce start-up time, an acceleration start function is embedded in AP As shown in Figure 5 and Figure 6, comparing to the Flyback application, the Buck-Boost converter has only inductor instead of transformer, has not primary snubber circuit. If the higher efficiency is required, the higher current rating diode is preferred.
Use Voltage Divider Rule to find 1. Review of LR les. The pin is detecting the rectified sine waveform peak value of input voltage.
W1 Start at Pin 3. EF16, PC40 or equivalent 2 Bobbin: Transformer Electrical Schematic Diagram Apr. Load Regulation of Output Current 7. Too high capacitance will result in the distortion of sine waveform current reference, and then the worse Power Factor.
In Buck-Boost application, there is not transformer but an inductor, which means the equivalent turns ratio is 1. Therefore les VCC voltage which comes from aux winding coupling with transformer winding also needs the wider operating voltage range. Documents Flashcards Grammar checker. Therefore, a line compensation circuit is necessary to decrease or eliminate this gap and achieve the better output current accuracy. High Voltage Demo Boards.
Data sheet, Pin configuration, Pin description | Diodes AP User Manual | Page 2 / 11
The effective area of EF16 is The design specification is 8. The AP start-up voltage threshold is Pin Configuration and Description The AP features low start-up current, low operation current and high efficiency. This will lead to AP latch working mode.
FB voltage is used to control no load output voltage and determine acceleration stop point at start-up phase 6 GND Ground. At start-up phase, the AP system Apr. The AP have a wide operating voltage window from 8V to 30V. Certainly, the efficiency and BOM cost are also the important factors for components selection. The output current is constant regardless of output voltage changing.
So the AP also can be used in non-isolated Buck-Boost application. This pin captures the feedback voltage from the auxiliary winding. Insulation 1 Layer of insulation tape , 0. The a1p682 current sense resistor value is one of design inputs for output constant current value setting according to equation Current return for gate driver and control circuits of the IC. On the other hand, if the output voltage is the lower, the KP value should be set as the higher, so that the higher diode rectifier conduction duty cycle, the lower primary peak current, and the higher conversion ler.
When open load condition or load disconnecting happens, the output voltage rises to the maximum value and the FB pin voltage reaches 4V.