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AEO40B48-6 Datasheet(PDF) 7 Page - Astec America, Inc |
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AEO40B48-6 Datasheet(HTML) 7 Page - Astec America, Inc |
7 / 30 page Technical Reference Notes AEO_ALO40/35/30/20/10x48 Series (Single Output 8 th Brick) MODEL: AEO40x48 / ALO40x48 SERIES SHEET 7 OF 30 JUNE 24, 2005 - REVISION B Figure 4. External resistor configuration to decrease the o/p. Figure 3. External resistor configuration to increase the o/p. Basic Operation and Features INPUT UNDER VOLTAGE LOCKOUT To prevent any instability to the converter, which may affect the end system, the converter have been designed to turn-on once VIN is in the voltage range of 33-36 VDC. Likewise, it has also been programmed to turn-off when VIN drops down to 31-34 VDC. OUTPUT VOLTAGE ADJUST/TRIM The converter comes with a TRIM pin (PIN 6), which is used to adjust the output by as much as 90% to 110% of its set point. This is achieved by connecting an external resistor as described below. To INCREASE the output, external Radj_up resistor should be connected between TRIM PIN (Pin6) and +SENSE PIN (Pin 7). Please refer to Equation (1) for the required external resistance and output adjust relationship. Equation (1a): 1.5V to 12V Equation (1b): 1.2V To DECREASE the output, external Radj_down resistor should be connected between TRIM pin (Pin 6) and -SENSE PIN (Pin 5). Please refer to Equation (2) for the required external resistance and output adjust relationship. Equation (2): Where: ∆% = percent change in output voltage OUTPUT ENABLE The converter comes with an Enable pin (PIN 2), which is primarily used to turn ON/OFF the converter. Both a Positive (no “N” suffix required) and a Negative (suffix “N” required) Enable Logic options are being offered. Please refer to Table 2 for the Part Numbering Scheme. For Positive Enable, the converter is turned on when the Enable pin is at logic HIGH or left open. The unit turns off when the Enable pin is at logic LOW or directly connected to -VIN. On the other hand, the Negative Enable version turns unit on when the Enable pin is at logic LOW or directly connected to -VIN. The unit turns off when the Enable pin is at Logic HIGH. Radj_down 510 ∆% 10.2 − k Ω ⋅ Radj_up 5.1 Voset × 100 ∆% + ( ) × 0.6 ∆% × 510 ∆% − 10.2 − = ΚΩ Radj_up 5.1 Voset × 100 ∆% + ( ) × 1.225 ∆% × 510 ∆% − 10.2 − = ΚΩ |
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