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NCP1937A1DR2G Datasheet(PDF) 9 Page - ON Semiconductor |
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NCP1937A1DR2G Datasheet(HTML) 9 Page - ON Semiconductor |
9 / 38 page NCP1937 www.onsemi.com 9 Table 4. ELECTRICAL CHARACTERISTICS: (VCC = 12 V, VBO/X2 = 120 V, VHV/X2 = 120 V, VFault = open, VRPFBHV = 20 V, VPFBLV = 2.4 V, VPControl = 4 V, VPCS/PZCD = 0 V, VQFB = 3 V, VPONOFF = 4 V, VQCS = 0 V, VQZCD = 0 V, VPSTimer = 0 V, RPFBHV = 200 kW, CVCC = 100 nF , CQCT = 220 pF, CPDRV = 1 nF, CQDRV = 1 nF, for typical values TJ = 25_C, for min/max values, TJ is – 40_C to 125_C, unless otherwise noted) Characteristics Unit Max Typ Min Symbol Pin Conditions PFC REGULATION BLOCK EA Output Control Voltage Range VPControl(MAX) - VPControl(MIN) 5 DVPControl 3.8 4.0 4.2 V Delta Between Minimum Control Voltage and Lower Clamp PControl Voltages VPControl(MIN) − VPClamp(lower) 5 DVPClamp(lower) −125 −100 −75 mV Ratio between the Vout Low Detect Threshold and the Regulation Level VPFBLV decreasing, VBOOST / VPREF(HL) VPFBLV decreasing, VBOOST / VPREF(LL) 18 KLOW(PFCHL) KLOW(PFCLL) 0.940 0.940 0.945 0.945 0.950 0.950 Ratio between the Vout Low Exit Threshold and the Regulation Level VPFBLV increasing 18 KLOW(HYSHL) KLOW(HYSLL) 0.950 0.950 0.960 0.960 0.965 0.965 Source Current During Vout Low Detect 5 IPControl(boost) 190 240 290 mA PFC In Regulation Threshold VPControl increasing 5 IIn_Regulation −6.5 – 0 mA Resistance of Internal Pull Down Switch IPControl = 5 mA 5 RPControl 4 25 50 W PFC SKIP MODE Delta Between Skip Level and Lower Clamp PControl Voltages VPControl decreasing, measured from VPClamp(lower) 5 DVPSKIP 5 25 50 mV PFC Skip Hysteresis VPControl increasing 5 VPSKIP(HYS) 25 50 75 mV Delay Exiting Skip Mode Apply 1 V step from VPClamp(lower) 5 tdelay(PSKIP) – 50 60 ms PFC FAULT PROTECTION Ratio between the Hard Overvoltage Pro- tection Threshold and Regulation Level VPFBLV increasing KPOVP(LL) = VPFBLV/VPREF(LL) KPOVP(HL) = VPFBLV/VPREF(HL) 18 KPOVP(LL) KPOVP(HL) 1.06 1.05 1.08 1.06 1.10 1.08 Soft Overvoltage Protection Threshold VPSOVP(LL) = soft overvoltage level DPOVP(LL) = KPOVP * VPREF(LL) − VPSOVP(LL) DPOVP(HL) = KPOVP * VPREF(HL) − VPSOVP(HL) 18 DPOVP(LL) DPOVP(HL) 20 20 – – 55 55 mV PFC Feedback Pin Disable Threshold VPFBLV decreasing 18 VPFB(disable) 0.225 0.30 0.35 V PFC Feedback Pin Enable Threshold VPFBLV increasing 18 VPFB(enable) 0.275 0.35 0.40 V PFC Feedback Pin Hysteresis VPFBLV increasing 18 VPFB(HYS) 25 50 mV PFC Feedback Disable Delay 18 tdelay(PFB) 30 ms PFC ON TIME CONTROL PFC Maximum On Time VPControl = VPControl(MAX), VBO/X2 = 163 V VBO/X2 = 325 V 15 ton1a ton1b 12.5 4.25 15 5.00 17.5 5.75 ms Minimum On−Time VPControl = VPControl(MIN) 15 tP(on−time) – – 200 ns PFC Frequency Clamp (See Table 2 for device options) 15 fclamp(PFC) 112 215 131 250 150 285 kHz |
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