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FAN6920MRMY データシート(PDF) 10 Page - Fairchild Semiconductor |
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FAN6920MRMY データシート(HTML) 10 Page - Fairchild Semiconductor |
10 / 24 page © 2010 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN6920MR • Rev. 1.0.3 10 Electrical Characteristics (Continued) VDD=15V, TA=-40°C ~105°C (TA=TJ), unless otherwise specified. Symbol Parameter Conditions Min. Typ. Max. Units PWM STAGE Feedback Input Section AV Input-Voltage to Current Sense Attenuation (4) AV = VCS /VFB , 0 < VCS < 0.9 1/2.75 1/3.00 1/3.25 V/V ZFB Input Impedance (4) VFB > VG 3 5 7 kΩ IOZ Bias Current VFB = VOZ 1.2 2.0 mA VOZ Zero Duty Cycle Input Voltage 0.7 0.9 1.1 V VFB-OLP Open-Loop Protection Threshold Voltage 3.9 4.2 4.5 V tFB-OLP The Debounce Time for Open- Loop Protection 40 50 60 ms tFB-SS Internal Soft-Start Time (4) VFB = 0V~3.6V 4 5 6 ms DET Pin OVP and Valley Detection Section VDET-OVP Comparator Reference Voltage 2.45 2.50 2.55 V Av Open-Loop Gain (4) 60 dB BW Gain Bandwidth (4) 1 MHz tDET-OVP Output OVP (Auto-Recovery) Debounce Time 100 150 200 µs IDET-SOURCE Maximum Source Current VDET = 0V 1 mA VDET-LOW Lower Clamp Voltage IDET = 1mA 0.15 0.25 0.35 V tVALLEY-DELAY Delay Time from Valley Signal Detected to Output Turn-On (4) 150 200 250 ns tOFF-BNK Leading-Edge Blanking Time for DET-OVP (2.5V) and Valley Signal when PWM MOS Turns Off (4) 2.5 µs tTIME-OUT Time-Out After tOFF-MIN (4) 8 9 10 µs PWM Oscillator Section tON-MAX-PWM Maximum On-Time 38 45 52 µs tOFF-MIN Minimum Off-Time VFB ≧ VN, TA = 25°C 5 µs VFB = VG 20.5 VN Beginning of Green-On Mode at FB Voltage Level 1.95 2.10 2.25 V VG Beginning of Green-Off Mode at FB Voltage Level 1.00 1.15 1.30 V ΔVG Hysteresis for Beginning of Green-Off Mode at FB Voltage Level (4) 0.1 V Continued on the following page… |
同様の部品番号 - FAN6920MRMY |
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同様の説明 - FAN6920MRMY |
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