板級(jí)電源設(shè)計(jì)技術(shù)-lm2940-與tl431參數(shù)與應(yīng)用(編輯修改稿)
2025-08-10 00:13 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 1) 最小陰極電流調(diào)節(jié)Imin – – mA Off–State Cathode Current (Figure 3) VKA = 36 V, Vref = 0 V 斷態(tài)陰極電流Ioff – 260 1000 – 260 1000 nA Dynamic Impedance (Figure 1, Note 3)動(dòng)態(tài)阻抗 VKA = Vref, DIK= to 100mA f 3 |ZKA| – – ΩELECTRICAL CHARACTERISTICS (TA = 25℃, unless otherwise noted.)電氣特性（25℃，除非另有說明。） Characteristic 特性 Symbol 符號(hào) TL431AI TL431AC TL431BI Unit 單位最小值 典型值 最大值最小值 典型值 最大值最小值 典型值 最大值Reference Input Voltage (Figure 1)參考輸入電壓 VKA = Vref, IK = 10 mA TA = 25℃ Vref V TA = Tlow to Thigh –– Reference Input Voltage Deviation Over Temperature Range (Figure 1, Notes 1, 2) 參考輸入電壓偏差溫度范圍VKA= Vref, IK = 10 mA DVref – 30 – 17 – 17 mV Ratio of Change in Reference Input Voltage to Change in Cathode to Anode Voltage IK = 10 mA (Figure 2), △VKA = 10 V to Vref△Vref△VKA– – – – – – – – – mV/V △VKA = 36 V to 10 V ––––––––– Reference Input Current (Figure 2)參考輸入電流 IK = 10 mA, R1 = 10 k, R2 = ∞ TA = 25℃ Iref – – – – μA TA = Tlow to Thigh (Note 1)– –––– Reference Input Current Deviation Over Temperature Range (Figure 2, Note 1) IK = 10 mA, R1 = 10k, R2 = ∞ 參考輸入電流偏差溫度范圍DIref – – – μA Minimum Cathode Current For Regulation 最小陰極電流調(diào)節(jié)VKA = Vref (Figure 1) Imin – – – mA Off–State Cathode Current(Figure 3) 斷態(tài)陰極電流VKA = 36V, Vref =0V Ioff – 260 1000 – 260 1000 – 230 500 nA Dynamic Impedance (Figure 1, Note 3) VKA = Vref, DI
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