| 전자부품 데이터시트 검색엔진 |
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TLVH431 데이터시트(PDF) 21 Page - Texas Instruments |
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TLVH431 데이터시트(HTML) 21 Page - Texas Instruments |
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21 / 37 page ![]() www.ti.com APPLICATION INFORMATION P − + P P VCC VFB Current Sense Gate Drive GND Controller P P P P TLVH431 VO 3.3 V VI 120 V ∼ ∼ TLVH431, TLVH431A, TLVH431B TLVH432, TLVH432A, TLVH432B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS SLVS555F – NOVEMBER 2004 – REVISED OCTOBER 2005 Figure 18. Flyback With Isolation Using TLVH431 and TLVH432 as Voltage Reference and Error Amplifier Figure 18 shows the TLVH431 used in a 3.3-V isolated flyback supply. Output voltage VO can be as low as reference voltage VREF (1.24 V). The output of the regulator plus the forward voltage drop of the optocoupler LED (1.24 + 1.4 = 2.64 V) determine the minimum voltage that can be regulated in an isolated supply configuration. Regulated voltage as low as 2.7 Vdc is possible in the topology shown in Figure 18. 21 |
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