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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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SS6563-CNTB Fiches technique(PDF) 6 Page - Silicon Standard Corp. |
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SS6563-CNTB Fiches technique(HTML) 6 Page - Silicon Standard Corp. |
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6 / 10 page  www.SiliconStandard.com 6 of 10 SS6563 PIN DESCRIPTIONS PIN 1: DC - The collector of the switch - 2A. PIN 2: DE - Darlington switch emitter. PIN 3: CF - Oscillator timing capacitor. PIN 4: GND - Power ground. PIN 5: FB - Feedback comparator inverting input. PIN 6: VCC - Power supply input. PIN 7: IS - Highside current sense input. VCC - VIS=300mV. PIN 8: BOOST - Bootstrapped driver collector. APPLICATION INFORMATION DESIGN FORMULA TABLE CALCULATION STEP-DOWN STEP-UP t t ON OFF V + V V - V - V OUT F IN(MIN) SAT OUT V + V V V - V OUT F IN(MIN) IN(MIN) SAT - (tON + tOFF) MAX 1 FMIN 1 FMIN CT 4x10 -5t ON 4 x 10 -5t ON IC (SWITCH) 2IOUT(MAX) 2IOUT(MAX) ( ) t + t t ON OFF OFF RS 0.3/IC(SWITCH) 0.3/ IC (SWITCH) L(MIN) ( ) V - V - V I t IN(MIN) SAT OUT C(SWITCH) ON(MAX) ( ) V - V I t IN(MIN) SAT C(SWITCH) ON(MAX) Co I (t + t 8 V C ( SWITCH) ON OFF RIPPLE( P - P ) ) I t V OUT ON RIPPLE(P - P) VSAT = Saturation voltage of the output switch. VF = Forward voltage of the ringback rectifier The following power supply characteristics must be chosen: VIN - Nominal input voltage. VOUT - Desired output voltage, VOUT = 1.25 (1 + RB/RA) IOUT - Desired output current. FMIN - Minimum desired switching frequency at selected values for VIN and IOUT. VRIPPLE (P-P) - Desired peak-to-peak output ripple voltage. In practice, the calculated value will need to be increased due to the capacitor equivalent series resistance and board lay- out. The ripple voltage should be kept to a low value since it will directly affect the line and load regulation. Rev.2.02 4/06/2004 |
Numéro de pièce similaire - SS6563-CNTB |
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Description similaire - SS6563-CNTB |
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