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FAN5345 データシート(PDF) 5 Page - Fairchild Semiconductor |
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FAN5345 データシート(HTML) 5 Page - Fairchild Semiconductor |
5 / 14 page © 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN5345 • Rev. 1.0.0 5 Electrical Specifications VIN = 2.5V to 5.5V and TA = -40°C to +85°C unless otherwise noted. Typical values are at TA = +25°C and VIN = 3.6V. Symbol Parameter Conditions Min. Typ. Max. Unit Power Supplies ISD Shutdown Supply Current EN = GND 0.30 0.90 A IQ(ACTIVE) Quiescent Current at ILOAD = 0mA Device Not Switching, No Load 300 A VUVLO Under-Voltage Lockout Threshold VIN Rising 2.10 2.35 2.60 V VIN Falling 1.80 2.05 2.30 VUVHYST Under-Voltage Lockout Hysteresis 250 mV EN: Enable Pin VIH HIGH-Level Input Voltage 1.2 V VIL LOW-Level Input Voltage 0.4 V REN EN Pull-Down Resistance 200 300 400 k TLO EN Low Time for Dimming (3) VIN = 3.6V; Figure 28 0.5 300 µs THI Delay Between Steps (3) VIN = 3.6V; Figure 28 0.5 µs TSD EN Low, Shutdown Pulse Width VIN = 3.6V; from Falling Edge of EN 1 ms Feedback and Reference VFB Feedback Voltage ILED = 20mA from -40°C to +85°C, 2.7V ≤ VIN ≤ 5.5V 230 250 270 mV IFB Feedback Input Current VFB = 250mV 0.1 1.0 A Power Outputs RDS(ON)_Q1 Boost Switch On Resistance VIN = 3.6V, ISW = 100mA 600 m VIN = 2.5V, ISW = 100mA 650 ISW(OFF) SW Node Leakage (2) EN = 0, VIN = VSW = VOUT = 5.5V, VLED = 0V 0.1 2.0 A ILIM-PK Boost Switch Peak Current Limit FAN5345S20X: VIN = 3.2V to 4.3V, TA = 20°C to +60°C, VF = 3.4V, 4 LEDs 200 300 400 mA FAN5345S30X 500 750 1000 Oscillator fSW Boost Regulator Switching Frequency 0.95 1.15 1.35 MHz Output and Protection VOVP Boost Output Over-Voltage Protection FAN5345S20X 18.0 20.0 21.5 V FAN5345S30X 27.5 30.0 32.5 OVP Hysteresis FAN5345S20X 0.8 FAN5345S30X 1.0 VTLSC VOUT Short-Circuit Detection Threshold VOUT Falling VIN – 1.4 V VTHSC VOUT Short-Circuit Detection Threshold VOUT Rising VIN – 1.2 V DMAX Maximum Boost Duty Cycle (3,4) 85 % DMIN Minimum Boost Duty Cycle (3,4) 20 TTSD Thermal Shutdown 150 °C THYS Thermal Shutdown Hysteresis 35 °C Notes: 2. SW leakage current includes the leakage current of two internal switches; SW to GND and SW to VOUT. 3. Not tested in production; guaranteed by design. 4. Application should guarantee that minimum and maximum duty cycle fall between 20-85% to meet the specified range. |
同様の部品番号 - FAN5345 |
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同様の説明 - FAN5345 |
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