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NCP1247CD100R2G Datasheet(PDF) 7 Page - ON Semiconductor |
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NCP1247CD100R2G Datasheet(HTML) 7 Page - ON Semiconductor |
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7 / 42 page  NCP1247 http://onsemi.com 7 ELECTRICAL CHARACTERISTICS (For typical values TJ = 25°C, for min/max values TJ = −40°C to +125°C, VHV = 125 V, VCC = 11 V unless otherwise noted) Characteristics Unit Max Typ Min Symbol Test Condition FEEDBACK VFB to internal current setpoint division ratio KFB 4.7 5 5.3 − Internal pull−up voltage on the FB pin (Note 6) VFB(ref) 4.5 5 5.5 V Feedback voltage below which the peak current is frozen VFB(freeze) 1.35 1.5 1.65 V SKIP CYCLE MODE Feedback voltage thresholds for skip mode VFB going down VFB going up Vskip(in) Vskip(out) 0.63 0.72 0.70 0.80 0.77 0.88 V REMOTE CONTROL ON FB PIN The voltage above which the part enters the on mode VCC > VCC(off), VHV = 60 V VON − 2.2 − V The voltage below which the part enters the off mode VCC > VCC(off) VOFF 0.35 0.40 0.45 V Minimum hysteresis between the VON and VOFF VCC > VCC(off), VHV = 60 V VHYST 500 − − mV Pull−up current in off mode VCC > VCC(off) IOFF − 5 − mA Go To Off mode timer VCC > VCC(off) tGTOM 100 150 300 ms OVERLOAD PROTECTION Fault timer duration tfault 108 128 178 ms Autorecovery mode latch−off time duration tautorec 0.85 1.00 1.35 s OVERPOWER PROTECTION VHV to IOPC conversion ratio KOPC − 0.54 − mA / V Current flowing out of CS pin (Note 7) VHV = 125 V VHV = 162 V VHV = 325 V VHV = 365 V IOPC(125) IOPC(162) IOPC(325) IOPC(365) − − − 105 0 20 110 130 − − − 150 mA FB voltage above which IOPC is applied VHV = 365 V VFB(OPCF) 2.12 2.35 2.58 V FB voltage below which is no IOPC applied VHV = 365 V VFB(OPCE) − 2.15 − V LATCH−OFF INPUT High threshold VLatch going up VOVP 2.35 2.5 2.65 V Low threshold VLatch going down VOTP 0.76 0.8 0.84 V Current source for direct NTC connection During normal operation During soft−start VLatch = 0 V INTC INTC(SSTART) 65 130 95 190 105 210 mA Blanking duration on high latch detection 65 kHz version 100 kHz version tLatch(OVP) 35 20 50 35 70 50 ms Blanking duration on low latch detection tLatch(OTP) − 350 − ms Clamping voltage ILatch = 0 mA ILatch = 1 mA Vclamp0(Latch) Vclamp1(Latch) 1.0 1.8 1.2 2.4 1.4 3.0 V TEMPERATURE SHUTDOWN Temperature shutdown TJ going up TTSD − 150 − °C Temperature shutdown hysteresis TJ going down TTSD(HYS) − 30 − °C 5. Internal supply current only, currents sourced via FB pin is not included (current is flowing in GND pin only). 6. Guaranteed by design. 7. CS pin source current is a sum of Ibias and IOPC, thus at VHV = 125 V is observed the Ibias only, because IOPC is switched off. |
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