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NCP5211A Datasheet(PDF) 4 Page - ON Semiconductor |
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NCP5211A Datasheet(HTML) 4 Page - ON Semiconductor |
4 / 16 page NCP5211A http://onsemi.com 4 ELECTRICAL CHARACTERISTICS (continued) (−40 °C < TA < 85°C; −40°C < TJ < 125°C; 4.5 V < VCC, VC < 14 V; 7.0 V < BST < 20 V; CGATE(H) = CGATE(L) = 3.3 nF; ROSC = 51 k; CCOMP = 0.1 µF, unless otherwise specified.) Characteristic Test Conditions Min Typ Max Unit GATE(H) and GATE(L) High Voltage (AC) GATE(L), GATE(H) 0.5 nF < CGATE(H) = CGATE(L) < 10 nF VC − 0.5 BST − 0.5 − − V Low Voltage (AC) GATE(L) or GATE(H) 0.5 nF < CGATE(H); CGATE(L) < 10 nF − − 0.5 V Rise Time VC = BST = 10 V, Measure: 1.0 V < GATE(L) < 9.0 V, 1.0 V < GATE(H) < 9.0 V − 40 80 ns Fall Time VC = BST = 10 V, Measure: 1.0 V < GATE(L) < 9.0 V, 1.0 V < GATE(H) < 9.0 V − 40 80 ns GATE(H) to GATE(L) Delay GATE(H) < 2.0 V, GATE(L) > 2.0 V 40 70 110 ns GATE(L) to GATE(H) Delay GATE(L) < 2.0 V, GATE(H) > 2.0 V 40 70 110 ns GATE(H)/(L) Pull−Down Resistance to PGND 20 50 115 k Ω Overcurrent Protection Current Limit Threshold 0 V < IS+ < 4.5 V, 0 V < IS− < 4.5 V 54 60 66 mV IS+ Bias Current 0 V < IS+ < 4.5 V −1.0 0.1 1.0 µA IS− Bias Current 0 V < IS− < 4.5 V −1.0 0.1 1.0 µA PWM Comparator Transient Response COMP = 0 − 1.5 V, VFFB, 20 mV overdrive − 100 200 ns PWM Comparator Offset VFB = VFFB = 0 V; Increase COMP until GATE(H) starts switching 0.425 0.475 0.525 V Artificial Ramp Duty Cycle = 70% (Note 3) 30 55 80 mV VFFB Bias Current VFFB = 0 V − 0.1 1.0 µA VFFB Max Input (Note 3) 1.1 − − V Minimum Pulse Width − − − 200 ns Oscillator Switching Frequency ROSC = 51 k 270 300 330 kHz ROSC Voltage − 1.21 1.25 1.29 V Max Duty Cycle VCOMP > VFFB + 1.0 V 65 70 75 % General Electrical Specifications VCC Supply Current COMP = 0 V (no switching) − 7.0 8.3 mA BST Supply Current COMP = 0 V (no switching) − 2.0 3.0 mA VC Supply Current COMP = 0 V (no switching) − 2.0 3.0 mA Start Threshold GATE(H) Switching, COMP Charging 4.03 4.18 4.33 V Stop Threshold GATE(H) Not Switching, COMP Not Charging 3.89 4.04 4.19 V Hysteresis Start−Stop 100 140 180 mV Sense Ground Current − − 0.15 1.00 mA 3. Guaranteed by design. Not tested in production. |
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