When the low-side MOSFET is switched on, the bootstrap capacitor is charged to VCC through the bootstrap diode. This provides a floating high-side supply voltage at VB with respect to VS. The bootstrap diode is a fast-recovery device rated at a ...
An input clamping circuit composed of two or more Zener diodes connected in series with each other and in the reverse direction with respect to each other, is connected between the base of the switching transistor and the base bias point of the input transistor so that the base voltage of ...
The 18V zener diode insures against gate-source breakdown (VGSMAX = 20V) and the diode clamps the VSW pin to the VIN potential. Mention of these considerations appears in Appendix C. The transformer's rectified and filtered secondary pro- duces the 5V output. This output is galvanically ...
The Zener diode prevents VC pin overdrive. A2 also rises, taking the IC out of shutdown mode. The VSW pin pulses the inductor at the 100kHz clock rate, causing the output to abruptly rise. This action trips A1 low, forcing the VC pin back low and shutting off VSW pulsing. A2 also ...
This potential can be completely avoided by using a Zener diode in series with a flyback diode. When the switch is opened, the inductor current is shunted through this series arrangement, maintaining voltage equal to the Zener voltage, plus the flyback diode provides current until...
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The external Power MOSFET maximum drain to source voltage must be higher than output voltage; the maximum gate to source voltage must be higher than the input voltage (in Figure 33, if VIN is higher than 16 V, the gate must be protected through the Zener diode and resistor) The current ...
The external Power MOSFET maximum drain to source voltage must be higher than the output voltage; the maximum gate to source voltage must be higher than the input voltage (in Figure 33, if VIN is higher than 16 V, the gate must be protected through a Zener diode and resistor) The ...
which according to a control signal for driving the switching element (Tr7); and an active clamp circuit (diode D1 , the Zener diode ZD1, resistors... 町田修,青木宏宪 被引量: 0发表: 2015年 Short-circuit protection structure for insulated gate power devices This paper, we present a new...
When the switch opens, the current is shunted through the general-purpose diode and Zener diode path, maintaining a voltage equal to the Zener voltage (plus forward diode drop) until the inductor energy is dissipated. Figure 4. Zener diode for faster current decay. Active Clamping Using ...