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NCP1573 Fiches technique(PDF) 4 Page - ON Semiconductor |
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NCP1573 Fiches technique(HTML) 4 Page - ON Semiconductor |
4 / 17 page NCP1573 http://onsemi.com 4 ELECTRICAL CHARACTERISTICS (continued) (0°C < TJ < 125°C, 11.4 V < VCC < 12.6 V, CGATE(H) = CGATE(L) = 3.3 nF, CPGDELAY = 0.01 μF, CCOMP = 0.1 μF; unless otherwise specified.) Characteristic Unit Max Typ Min Test Conditions PWM Comparator PWM Comparator Offset VFB = 0 V, Increase COMP Until GATE(H) Starts Switching 0.475 0.525 0.575 V Ramp Max Duty Cycle − − 80 − % Artificial Ramp Duty Cycle = 50% 15 25 35 mV Transient Response COMP = 1.5 V, VFB 20 mV Overdrive. Note 3 − 200 300 ns VFB Input Range Note 3 0 − 1.4 V Oscillator Switching Frequency − 150 200 250 kHz General Electrical Specifications VCC Supply Current COMP = 0 V (No Switching) − 10 15 mA 3. Guaranteed by design. Not tested in production. PACKAGE PIN DESCRIPTION PACKAGE PIN # PIN SYMBOL FUNCTION 1 VCC Power supply input. 2 PWRGD Open collector output goes low when VFB is out of regulation. User must externally limit current into this pin to less than 20 mA. 3 PGDELAY External capacitor programs PWRGD low−to−high transition delay. 4 COMP Error amp output. PWM comparator reference input. A capacitor to LGND provides error amp compensation. Pulling pin < 0.475 V locks gate outputs to a zero percent duty cycle state. 5 GATE(H) High−side switch FET driver pin. Capable of delivering peak currents of 1.5 A. 6 GATE(L) Low−side synchronous FET driver pin. Capable of delivering peak currents of 1.5 A. 7 VFB Error amplifier and PWM comparator input. 8 GND Power supply return. |
Numéro de pièce similaire - NCP1573 |
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Description similaire - NCP1573 |
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