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ML4824 Scheda tecnica(PDF) 6 Page - Fairchild Semiconductor |
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ML4824 Scheda tecnica(HTML) 6 Page - Fairchild Semiconductor |
6 / 16 page ML4824 6 REV. 1.01 12/7/2000 TYPICAL PERFORMANCE CHARACTERISTICS 250 200 150 100 50 0 VFB (V) 05 3 14 2 250 200 150 100 50 0 IEA INPUT VOLTAGE (mV) –500 500 0 400 300 200 100 0 VRMS (mV) 05 3 14 2 Voltage Error Amplifier (VEA) Transconductance (gm) Current Error Amplifier (IEA) Transconductance (gm) Gain Modulator Transfer Characteristic (K) 15 VEAO IEAO VFB IAC VRMS ISENSE RAMP 1 OSCILLATOR OVP PFC ILIMIT 2.5V + – – + 16 2 4 3 VEA 7 + – IEA 1 + – + – PFC OUT 12 S R Q Q S R Q Q 2.7V –1V 3.5k Ω 3.5k Ω GAIN MODULATOR Figure 1. PFC Section Block Diagram. |
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