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NCP5212AMNTXG Datasheet(PDF) 7 Page - ON Semiconductor |
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NCP5212AMNTXG Datasheet(HTML) 7 Page - ON Semiconductor |
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7 / 19 page  NCP5212A, NCP5212T http://onsemi.com 7 ELECTRICAL CHARACTERISTICS (VIN = 12 V, VCC = VCCP = 5 V, TA =−40°C to 85°C, unless other noted) Characteristics Unit Max Typ Min Test Conditions Symbol OSCILLATOR Operation Frequency FSW 270 300 330 kHz OVERCURRENT THRESHOLD Total Detection Time TDETECT Period of FB shorts to ground before SS 1.26 1.92 2.21 ms OCSET Detection Time T_OCDET (Note 2) 1.09 1.47 ms INTERNAL SOFT−START Soft−Start Time TSS 0.9 1.1 1.3 ms VOLTAGE ERROR AMPLIFIER DC Gain GAIN_VEA (Note 2) 88 dB Unity Gain Bandwidth BW_VEA (Note 2) 15 MHz Slew Rate SR_VEA COMP PIN TO GND = 100 pF (Note 2) 2.5 V/ms FB Bias Current Ibias_FB 0.1 mA Output Voltage Swing Vmax_EA Isource_EA = 2 mA 3.3 3.5 V Vmin_EA Isink_EA = 2 mA 0.15 0.3 V DIFFERENTIAL CURRENT SENSE AMPLIFIER CS+ and CS− Common−mode Input Signal Range VCSCOM_MAX Refer to AGND 3.5 V Input Bias Current CS_IIB −100 100 nA Input Signal Range CS_range −70 70 mV Offset Current at IDRP IDRP_offset (CS+) − (CS−) = 0 V −1.0 1.0 mA [(CS+)−(CS−)] to IDRP Gain IDRP_GAIN (IDRP/((CS+) − (CS−))) (CS+) − (CS−) = 10 mV, V(IDRP) = 0.8 V TA = 25°C 0.475 0.525 0.575 mA/mV TA = −40°C to 85°C 0.425 0.625 mA/mV Current−Sense Bandwidth BW_CS At −3dB to DC Gain (Note 2) 20 MHz Maximum IDRP Output Voltage IDRP_Max (CS+) − (CS−) = 70 mV, Isource drops to 95% of the value when V(IDRP) = 0.8 V 2.5 V Minimum IDRP Output Voltage IDRP_Min 0 V IDRP Output current I_IDRP −1.0 35 mA OVERCURRENT PROTECTION SETTING Overcurrent Threshold (OCTH) Detection Current I_OCSET Sourced from OCP before soft−start, Rocset = 16.7 kW is connected from OCP to AGND or FB 21.6 24 26.4 mA Ratio of OC Threshold over OCSET Votlage K_OCSET V((CS+) − (CS−)) / V_OCSET (Note 2) 0.1 − OCSET Voltage for Default Fixed OC Threshold VOCSET_DFT Rocset v 2 kW is connected from OCP to AGND or FB 100 mV OCSET Voltage for Adjustable OC Threshold VOCSET_ADJ Rocset = 8.3 ~ 25 kW is connected from OCP to AGND or FB 200 600 mV OCSET Voltage for OC Disable VOCSET_DIS Rocset w 35 kW is connected from OCP to AGND or FB 720 mV Default Fixed OC Threshold V_OCTH_DFT (CS+) – (CS−), Pin OCP is shorted to AGND or FB 35 40 45 mV 2. Guaranteed by design, not tested in production. |
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