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The primary resonant circuit of primary inductance and drain capacitor ensures this quasi-resonant operation. Start-up, mains enabling operation level and. Supply capacitor C VCC is charged.
Demagnetization management pin 4. To prevent very high frequency operation at lower loads, the quasi-resonant operation changes smoothly in fixed frequency PWM control.
TEAP Hoja de datos ( Datasheet PDF ) – GreenChipII SMPS control IC
Start-up current source pin 8. At very low power standby levels, the frequency is. V CC management pin 1.
Start-up, mains enabling operation level and undervoltage lock out see Figs. The TEA is the controller of a compact flyback.
Inhibiting the auxiliary supply by external means causes. The IC supply is taken over by the auxiliary winding as soon 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.
Duty cycle control pin 3. The next converter stroke is started tea157p after demagnetization of the transformer current zero current switchingwhile the drain voltage has reached the lowest voltage to prevent switching losses green function.
The IC supply is taken over by the auxiliary. The next converter stroke is started only after. Inhibiting the auxiliary supply by external means causes the converter to operate in a stable, well-defined burst mode.
The design can te1507p optimized in such a way that zero voltage switching can be reached over almost the universal mains range. An auxiliary winding of the transformer provides demagnetization detection and powers the IC after start-up. Typically, 3 Watts can be achieved for a yea1507p W converter with an output power of mW.
TEAP Datasheet pdf – GreenChip(tm)II SMPS control IC – NXP Semiconductors
At very low power tea107p levels, the frequency is controlled down, via the VCO, to a minimum frequency of about 6 kHz. Once the drain voltage exceeds the M-level mains-dependent operation-enabling levelthe start-up current source will continue charging capacitor C VCC switch S1 will be openedsee Fig. Initially, the IC is self supplying from the rectified mains. V CC start level.
The moment the voltage on pin V CC drops below the. To prevent very high frequency operation at lower loads. The TEA operates in multi modes.
All internal reference voltages are derived from a. Supply management All internal reference voltages are derived from a temperature compensated, on-chip band gap circuit.
The IC will activate the power.
Supply capacitor C VCC is charged by the internal start-up current source to a level of about 4 V or higher, depending on the drain voltage. File under Integrated Circuits, IC Typically, 3 Watts can twa1507p achieved for a.