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FA3686 Datasheet(PDF) 3 Page - List of Unclassifed Manufacturers |
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FA3686 Datasheet(HTML) 3 Page - List of Unclassifed Manufacturers |
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3 / 18 page  FA3686V 3 Error amplifier section (IN1–, FB1, IN2–, FB2, IN3–, FB3 pin) Item Symbol Test condition Min. Typ. Max. Unit Reference voltage (CH.1) VREF1 *1 0.99 1.00 1.01 V Reference voltage (CH.2) VREF2 *2 0.98 1.00 1.02 V Reference voltage (CH.3) VREF3 *3 0.98 1.00 1.02 V VREF Line regulation VREF_LINE VCC=2.5 to 18V ±2 ±5 mV VREF Variation with temperature VREF_TC1 Ta=–30 to +85˚C ±0.5 % Input bias current IIN– VINx–=0.0 to 2.5V *4 0.0 mA Open loop gain AVO 70 dB Unity gain bandwidth fT 1.5 MHz Output current (sink) ISIFB VFBx=0.5V, VINx–=VREG *4 2.3 3.5 4.7 mA Output current (source) ISOFB VFBx=VREG–0.5V, VINx–=0V *4 –360 –270 –180 µA *1 The FB1 voltage is measured under the condition that IN1- pin and FB1 pin are shorted. The input offset voltage of the error amplifier is included. *2 The FB2 voltage is measured under the condition that IN2- pin and FB2 pin are shorted. The input offset voltage of the error amplifier is included. *3 The FB3 voltage is measured under the condition that IN3- pin and FB3 pin are shorted. The input offset voltage of the error amplifier is included. *4 The “x” of INx- and FBx refers to 1 to 3. Soft start section (CS1, CS2 pin) Item Symbol Test condition Min. Typ. Max. Unit Threshold voltage (CS1) VCS1D0 Duty cycle=0%, VFB1=1.4V 0.82 V VCS1D20 Duty cycle=20%, VFB1=1.4V 0.89 0.925 0.96 V VCS1D80 Duty cycle=80%, VFB1=1.4V 1.25 1.285 1.32 V Threshold voltage (CS2) VCS2D0 Duty cycle=0%, VFB2=0.7V 1.33 V VCS2D20 Duty cycle=20%, VFB2=0.7V 1.20 1.235 1.27 V VCS2D80 Duty cycle=80%, VFB2=0.7V 0.84 0.875 0.91 V Charge current of CS2 (source) ICS1 VCS1=0.5V –2. –2.0 –1.5 µA Charge current of CS2 (sink) ICS2 VCS2=VREG–0.5V 1.5 2.0 2.4 µA Pulse width modulation (PWM) section (FB1, FB2 pin) Item Symbol Test condition Min. Typ. Max. Unit Max. duty cycle of OUT1 DMAX1 fOSC=300kHz 87 % RT=12k Ω (fOSC 500kHz) 80 85 90 % fOSC=1.5MHz 78 % Max. duty cycle of OUT2 DMAX2 fOSC=300kHz 88 % RT=12k (f OSC 500kHz) 80 85 90 % fOSC=1.5MHz 73 % Threshold voltage of FB1 VFB1D0 Duty cycle=0% 0.82 V VFB1D20 Duty cycle=20% 0.925 V VFB1D80 Duty cycle=80% 1.285 V Threshold voltage of FB2 VFB2D0 Duty cycle=0% 1.33 V VFB2D20 Duty cycle=20% 1.235 V VFB2D80 Duty cycle=80% 0.875 V Oscillator section (RT pin) Item Symbol Test condition Min. Typ. Max. Unit Oscillation frequency fOSC 435 500 565 kHz Line regulation fOSC_LINE VCC=2.5 to 18V ±1 ±5 % Variation with temperature fOSC_TC1 Ta=–30 to +85˚C±3 % |
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Similar Description - FA3686 |
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