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NCP1855 Datasheet(PDF) 8 Page - ON Semiconductor |
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NCP1855 Datasheet(HTML) 8 Page - ON Semiconductor |
8 / 26 page NCP1855 http://onsemi.com 8 Table 4. ELECTRICAL CHARACTERISTICS Min & Max Limits apply for TA between −40°C to +85°C and TJ up to +125°C for VIN between 3.9 V to 7 V (Unless otherwise noted). Typical values are referenced to TA = + 25°C and VIN = 5 V (Unless otherwise noted). Symbol Unit Max Typ Min Conditions Parameter BOOST CONVERTER AND OTG MODE VIBSTL Boost minimum input operating range Boost start−up 3.1 3.2 3.3 V Boost running 2.9 3 3.1 V VIBSTH Boost maximum input operating range 4.4 4.5 4.6 V VOBST Boost Output Voltage DC value measured on CAP pin, no load 5.00 5.1 5.15 V VOBSTAC Boost Output Voltage accuracy Measured on CAP pin Including line and load regulation −3 3 % IBSTMX Output current capability Configured Mode 1000 mA Un−configured Mode 150 mA FSWBST Switching Frequency 1.35 1.5 1.65 MHz IBPKM Maximum peak inductor current 2.5 A VOBSTOL1 Boost overload Voltage on CAP pin, falling 4.5 4.6 4.65 V VOBSTOL2 Un−configured Mode, falling, Voltage on IN pin 4.3 4.4 4.5 TOBSTOL Boost start−up time From OTG enable to VIN > VOBSTOL 32 ms IBSTPRE Boost Pre−charge current Un−configured Mode, Measured on IN pin RLOAD = 29 W, CLOAD = 10 mF 350 mA Configured Mode, Measured on IN pin RLOAD = 5.1 W, CLOAD = 10 mF 1.1 A TBSTPRE Boost Rise time Configured Mode, Measured on VIN, VIN rising (see Figure 3) RLOAD = ∞, CLOAD = 1 mF 0.3 4 ms RLOAD = 5.1 W, CLOAD = 10 mF VOBSTOV Overvoltage protection VIN rising 5.55 5.65 5.75 V Hysteresis 25 75 125 mV Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. Figure 3. Boost Test Schematic 90% 10% CLOAD RLOAD VIN VIN TBSTPRE |
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