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AN8028 bảng dữ liệu(PDF) 3 Page - Panasonic Semiconductor |
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AN8028 bảng dữ liệu(HTML) 3 Page - Panasonic Semiconductor |
3 / 13 page 3 Voltage Regulators AN8028 s Electrical Characteristics at VCC = 18 V, Ta = 25°C (continued) Parameter Symbol Conditions Min Typ Max Unit TON maximum on-period current I3TON FB terminal = open −135 −110 −85 µA TON terminal = GND TON upper limit voltage V3TON/H FB terminal = open 0.55 0.7 0.85 V TON lower limit voltage V3TON/L FB terminal = open − 0.1 0.05 0.2 V TOFF upper limit voltage V2TOFF/H 0.7 0.9 1.1 V TOFF lower limit voltage V2TOFF/L − 0.1 0.05 0.2 V Output oscillation frequency fOSC CON = 2 200 pF, ROFF = 1.5 kΩ 55 65 75 kHz COFF = 1 000 pF Output current feedback current gain GIFB IFB = −1 mA 5.05 6.8 8.55 Pre-start low-level output voltage V6STB/L VCC = 10 V, IOUT = 10 mA 1 1.25 V Low-level output voltage 1 V6L(1) IOUT = 10 mA 0.9 2 V Low-level output voltage 2 V6L(2) IOUT = 100 mA 1.1 2.2 V High-level output voltage 1 V6H(1) IOUT = −10 mA 15.7 16.5 V High-level output voltage 2 V6H(2) IOUT = −100 mA 15.5 16.3 V Pre-start circuit current I7STB VCC = 12V 55 95 135 µA Circuit current 1 I7OPR(1) VCC = 18 V 8.55 11.5 14.3 mA TON terminal = GND FB terminal = open Circuit current 2 I7OPR(2) VCC = 34 V 9.6 12.5 15.4 mA TON terminal = GND FB terminal = open TDL flowing-out current I1TDL VTDL = 0.5 V −50 µA Pin No. Equivalent circuit Description I/O 1 TDL: I Transformer reset detection terminal. When the transformer reset is detected and low is inputted into the terminal, the output of the IC (VOUT) becomes high. However, low-level sig- nal under the minimum off-period determined by the TOFF is ignored. 2 TOFF: Terminal for connecting the resistor and capaci- tor for determining the minimum off-period (low) of the IC output (VOUT). An equation for approximate calculation of the minimum off-period (TOFF) is as follows: TOFF = 2.2 × C × R C: External capacitance R: External resistance s Terminal Equivalent Circuits VREF High- side clamp Low- side clamp 1 VCC Comp. 0.1 V 2 |
Số phần tương tự - AN8028 |
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Mô tả tương tự - AN8028 |
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