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SI-8050SD Arkusz danych(PDF) 2 Page - Sanken electric |
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SI-8050SD Arkusz danych(HTML) 2 Page - Sanken electric |
2 / 2 page 25 ICs SI-8000SD Series ■External Dimensions (TO263-5) (Unit : mm) Pin Assignment q VIN w SWOUT e GND r VOS t S.S Plastic Mold Package Type Flammability: 94V-0 Product Mass: Approx. 1.48g 9.9 ±0.2 Case temperature measurement point (15°) (0.5) 2-R0.3 10.0 ±0.02 3-R0.3 (R0.3) (R0.3) 0.88 ±0.10 1.5 Dp: ±0.2 φ (1.7 ±0.25) 12345 (1.7 ±0.25) 0.8 ±0.1 4.5 ±0.2 1.3 0.10 ±0.15 2.4 ±0.2 +0.10 –0.05 (3°) (3°) (3°) (3°) (3°) 0 to 6° (2×R0.45) (1.7 ±0.25) (1.7 ±0.25) 0.8 ±0.1 10.0 ±0.2 (4.4) (8.0) ■Block Diagram 4 3 5 GND S.S 2 VIN SWOUT VOS 1 Reset Latch & driver Thermal protection Oscillator Comparator Error amplifier Internal power supply Overcurrent protection Reference voltage ■Reference Data Copper Laminate Area on Glass Epoxy Board vs. thermal resistance (junction to ambient air) (Typical Value) 55 50 45 40 35 30 0200 400 600 800 1000 Copper Laminate Area (mm 2) 1200 1400 1600 1800 With glass epoxy board of 40 × 40 mm ■Typical Connection Diagram VIN C1 C3 D1 L1 C2 VIN GND S.S GND SI-8000SD SWOUT VOS 12 4 3 5 + + VOUT GND Diode D1 • Be sure to use Schottky-barrier diode as D1. If other diodes like fast recovery diodes are used, ICs may be destroyed because of the reverse voltage generated by the recovery voltage or ON voltage. Choke coil L1 • If the winding resistance of the choke coil is too high, the efficiency may drop below the rated value. • As the overcurrent protection starting current is about 3.5 A, take care concerning heat radiation from the choke coil caused by magnetic saturation due to overload or short-circuited load. Capacitors C1, C2, and C3 • As large ripple currents flow through C1 and C2, use high-frequency and low-impedance capacitors aiming for switching-mode-power-supply use. Especially when the impedance of C2 is high, the switching waveform may become abnormal at low temperatures. For C2, do not use a capacitor with an extremely low equivalent series resistance (ESR) such as an OS capacitor or a tantalum capacitor, which may cause an abnormal oscillation. •C3 is a capacitor for soft start. Leave pin 5 open if the soft start function is not used. This pin is pulled up with a pull-up resistor inside the ICs. To create the optimum operating conditions, place the components as close as possible to each other. C1 : 50V/1000µF C2 : 50V/1000µF C3 :0.01µF (only when soft start function is used) L1 : 150µH D1 : SPB-G56 (Sanken) |
Podobny numer części - SI-8050SD |
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Podobny opis - SI-8050SD |
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