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L datasheet, Pinout ,application circuits High-voltage Resonant Controller

TRF SWRA digital power datasheet meter circuit diagram digital frequency meter circuit diagram microphone mixer schematic circuit diagram digital frequency meter “power factor measurement” schematic PIC L599 Digital panel meter diagram using microcontroller SR schematic diagram of audio device c siemens MHz. This function realizes burst-mode operation when the load falls below a level that can be programmed by properly choosing the resistor connecting the optocoupler to pin RFmin see block diagram.

The driver is capable of 0. Sometimes a small bypass capacitor 0. A current generator is ON as long as the voltage applied at the pin datashfet below 1. Under output short circuit, this normally results in a nearly constant peak primary current.

Current return for both the low-side gate-drive current and the bias current of the IC. To drive the high-side switch with the bootstrap approach, the IC incorporates a high-voltage floating structure able to withstand more than V datashfet a synchronous-driven high-voltage DMOS that replaces the external fast-recovery bootstrap diode.

The input section is provided withLa double ended primary controller for resonant ddatasheet ZVS zero voltage switching. Soft-start and delayed shutdown upon overcurrent timing diagram-Delay C Delay 0. The pin is to be connected to the high-voltage input bus with a resistor divider datwsheet perform either Dayasheet or DC in systems with PFC brownout protection.


Bias the pin between 1. A capacitor and a resistor are connected from this pin to GND to set both the datasheeh duration of an overcurrent condition before the IC stops switching and the delay after which the IC restarts switching.

This pin connects an external capacitor to GND and a resistor to RFmin pin 4 that set both the maximum oscillator frequency and the time constant for the frequency shift that occurs as the chip starts up soft-start. Output voltage regulation is obtained by modulating the operating frequency.

Their combination offers complete protection against overload and short circuits. The comparator is provided with current hysteresis: A fixed deadtime inserted between the turn-OFF of one switch and the turn-ON of the other one guarantees soft-switching and enables high-frequency operation.

Block Diagram and Schematic – – This Document can not be used without Samsung’s authorization – 8. If the current keeps on building up despite this frequency increase, a second comparator referenced at 1.

A higher level OCP latches off the IC if the first-level protection is not sufficient to control the primary current. Supply Voltage of both the signal part of the IC and the low-side gate driver. Oscillator’s internal block diagram. Internally the pin connects a comparator that, when the voltage on the pin exceeds 1.

The chip restarts switching as the voltage exceeds the reference by 50 mV. A is kept always on. Delayed shutdown upon overcurrent.


(PDF) L6599 Datasheet download

This frequency shift is non linear to minimize output voltage overshoots; its duration is programmable as well. During UVLO, it is open.

If the voltage on the pin reaches 2 V, the soft start capacitor is completely discharged so that the switching frequency is pushed to its maximum eatasheet and the ? The region on the left-hand side of the diagram in Figure 5, i. In fact it incorporates thevariations. Soft-start is not invoked.

Functions Pin functions Name Function Soft start. Tie the pin to GND if the function is not used. L Auxiliary power supplyTracking boost operation n Voltage feed-forward n Inductor saturation detector n L Try Findchips PRO for schematic diagram l High-side floating gate-drive output. Leave the pin unconnected if not used. A capacitor connected from this pin to GND is charged and discharged by internal current generators programmed by the external network connected to pin 4 RFmin and determines the switching frequency of the converter.

High-side gate-drive floating supply Voltage. If the voltage on the pin is lower than the reference, the IC enters an idle state and its quiescent current is reduced. Activating the zener causes the IC to shut down not latched. The voltage on the pin is top-limited by an internal zener. Current return for the high-side gate-drive current. Bypass the pin with a capacitor to GND to reduce noise pick-up.

The board provides one.