= 1.5 mHz; T period = 670 ns Cl = 470 pF Rt = 1.5 K Therefore; T (on) = 570 ns (max) T (off) = 100 ns (min) DUTY CYCLE, d max = T (on) max = 570 ns = 85% T (period) 670 ns NOTE: These times will determine the mosfet device selection and transformer turns ratio...
The relation be- tween VC and peak current in the power stage is given by: Figure 8 0019-9 Deadtime vs CT (RT > 5k) Figure 9 0019-10 Timing Resistance vs Frequency where: N = current sense transformer turns ratio = 1 when transformer not used. For purposes of small-signal analysis,...
A high level on the EN / UVLO pin turns on the soft start current source charging CSS and enables internal MOSFET gate driver control the VOUT to follow SS voltage at 9 times ratio. In case of OCP during soft start, the switch current will be regulated to the set current limit level....
The concentration of RNA was found to be the least in Prediabetic subject and ratio was found to be 1.89 indicating the presence of contamination. The RNA isolated from the Diabetic having ratio 1.97 which also indicates slight contamination. Current status of public health nursing in turkey, ...
21. The circuit of claim 19 wherein the functionality of the diode element is performed by one selected from the group consisting of a diode, Schottky diode, PNP transistor and a p-channel MOSFET (PMOS) transistor. 22. A method of arranging circuit elements in a light emitting diode (LED...
Figure 11.4.1, Current Mirror with non-unary gain ratio If on the input side of the mirror we connect N identical devices in parallel and connect M devices in parallel on the output side, the gain of the mirror will be M/N. In figure 11.4.1 we see an example where 2 (N=2) dev...
The PWM control circuit features adjustable duty ratio at a constant rate from 0 to 100%. The IC XL4015 also features an in-built over-current protection functionality. When a short circuit is detected at the output, the operating frequency is instantly lowered from 180 KHz to 48 KHz, causi...
At the same time, keep the current through the resistor network sufficiently larger (20x) than the leakage current on the EN/UVLO pin to minimize the error in the resistor divider ratio. 8.3.2 Overvoltage Protection (OVP) The TPS25983 allows the user to implement overvoltage lockout to ...
Current Sensing With a Current Sense Transformer S0432-01 Consider the current sense transformer, TCS, shown in Figure 15. The current flowing through RCS is the primary current, IPRI, reduced by the current sense transformer turns ratio. For a current transformer turns ratio of 100 to 1, ...
In the case of a resonant inductor, a capacitor may be used in parallel with the transformer, and also in the case of a current transformer. When a current transformer is used, the current transformer can be configured to have a windings ratio chosen to achieve optimal power factor ...