交流功率因數轉換器 特點： 精確度0.25%滿刻度 ±0.25o 多種輸入,輸出選擇 輸入與輸出絕緣耐壓2仟伏特/1分鐘 沖擊電壓測試5仟伏特(1.2x50us) (IEC255-4,ANSI C37.90a/1974) 突波電壓測試2.5仟伏特(0.25ms/1MHz) (IEC255-4) 尺寸小，穩定性高 主要規格： 精確度: 0.25% F.S. ±0.25°(23 ±5℃) 輸入負載: <0.2VA (Voltage) <0.2VA (Current) 最大過載能力: Current related input: 3 x rated continuous 10 x rated 30 sec. 25 x rated 3sec. 50 x rated 1sec. Voltage related input:maximum 2 x rated continuous 輸出反應速度: < 250ms(0~90%) 輸出負載能力: < 10mA for voltage mode < 10V for current mode 輸出之漣波: < 0.1% F.S. 歸零調整范圍: 0~ ±5% F.S. 最大值調整范圍: 0~ ±10% F.S. 溫度系數: 100ppm/℃ (0~50℃) 隔離特性: Input/Output/Power/Case 絕緣抗阻: >100Mohm with 500V DC 絕緣耐壓能力: 2KVac/1 min. (input/output/power/case) 突波測試: ANSI C37.90a/1974,DIN-IEC 255-4 impulse voltage 5KV(1.2x50us) 使用環境條件: -20~60℃(20 to 90% RH non-condensed) 存放環境條件: -30~70℃(20 to 90% RH non-condensed) CE認證: EN 55022:1998/A1:2000 Class A EN 61000-3-2:2000 EN 61000-3-3:1995/A1:2001 EN 55024:1998/A1:2001
交流電壓，電流轉換器 特點： 精確度0.25%滿刻度(RMS) 多種輸入,輸出選擇 輸入與輸出絕緣耐壓2仟伏特/1分鐘 沖擊電壓測試5仟伏特(1.2x50us) (IEC255-4,ANSI C37.90a/1974) 突波電壓測試2.5仟伏特(0.25ms/1MHz) (IEC255-4) 尺寸小，穩定性高 2:主要規格 精確度:0.25%F.S.(RMS) (23 ±5℃) 輸入負載: <0.2VA(voltage) <0.2VA(current) 最大過載能力: Current related input:3 x rated continuous 10 x rated 30 sec. ,25 x rated 3sec. 50 x rated 1sec. Voltage related input:maximum 2x rated continuous 輸出反應時間: <250ms (0~90%) 輸出負載能力: <10mA for voltage mode <10V for current mode 輸出漣波: <0.1% F.S. 歸零調整范圍: 0~±5% F.S. 最大值調整范圍: 0~±10% F.S. 溫度系數: 100ppm/℃ (0~50℃) 隔離特性: Input/Output/Power/Case 絕緣抗阻: >100Mohm with 500V DC 絕緣耐壓能力: 2KVac/1 min. (input/output/power) 行動測試: ANSI C37.90a/1974,DIN-IEC 255-4 impulse voltage 5KV (1.2 x 50us) 突波測試: 2.5KV-0.25ms/1MHz 使用環境條件: -20~60℃(20 to 90% RH non-condensed) 存放環境條件: -30~70℃(20 to 90% RH non-condensed) CE認證: EN 55022:1998/A1:2000 Class A EN 61000-3-2:2000 EN 61000-3-3:1995/A1:2001 EN 55024:1998/A1:2001
The purpose of this application note is to show an example of how a digital potentiometer can be used in thefeedback loop of a step-up DC-DC converter to provide calibration and/or adjustment of the output voltage.The example circuit uses a MAX5025 step-up DC-DC converter (capable of generating up to 36V,120mWmax) in conjunction with a DS1845, 256 position, NV digital potentiometer. For this example, the desiredoutput voltage is 32V, which is generated from an input supply of 5V. The output voltage can be adjusted in35mV increments (near 32V) and span a range wide enough to account for resistance, potentiometer and DCDCconverter tolerances (27.6V to 36.7V).
