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The IC supply is taken over by the auxiliary. The moment the voltage on pin V CC drops below the. At very low power standby levels, the frequency is. The IC supply is taken over by the auxiliary winding as tea1057p as the output voltage reaches its intended level and the IC supply from the mains voltage is subsequently stopped for high efficiency operation green function.
V CC start level.
Duty cycle control pin 3. Start-up current source pin 8.
The primary resonant circuit of primary inductance and drain capacitor ensures this quasi-resonant operation. Supply management All internal reference voltages are derived from a temperature compensated, on-chip band gap circuit. The TEA operates in multi modes.
Typically, 3 Watts can be achieved for a 75 W converter with an output power of mW. An auxiliary winding of the transformer provides demagnetization detection te1a507p powers the IC after start-up. Typically, 3 Watts can be achieved for a. The design can be optimized in such a way that zero voltage switching can be reached over almost the universal mains range.
TEAP Hoja de datos ( Datasheet PDF ) – GreenChipII SMPS control IC
The next converter stroke is started only after demagnetization of the transformer current zero current switchingwhile the drain voltage has reached the lowest voltage to ta1507p switching losses green function. Inhibiting the auxiliary supply by external means causes.
Demagnetization management pin 4. To prevent very high frequency operation at lower loads. All internal reference voltages are derived from a. The TEA is the controller of a compact flyback. Start-up, mains enabling operation level and.
Once the drain voltage tea150p the M-level mains-dependent operation-enabling levelthe start-up current source will continue charging capacitor C VCC switch S1 tea150p7 be openedsee Fig. Initially, the IC is self supplying from the rectified mains.
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To prevent very high frequency operation at lower loads, the quasi-resonant operation changes smoothly in fixed frequency PWM control. File under Integrated Circuits, IC The next converter stroke is started only after. Supply capacitor Te1507p VCC is charged by the internal start-up current source to a level of about 4 V or higher, depending on the drain voltage. At very low power standby levels, the frequency is controlled down, via the VCO, to a minimum frequency of about 6 kHz.
Supply capacitor C VCC is tea1057p. Start-up, mains enabling operation level and undervoltage lock out see Figs.
Inhibiting the auxiliary supply by external means causes the converter to operate in a stable, fea1507p burst mode. V CC management pin 1. The IC will activate the power.