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DCV012405P-U Datasheet(PDF) 8 Page - Burr-Brown (TI) |
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DCV012405P-U Datasheet(HTML) 8 Page - Burr-Brown (TI) |
8 / 8 page 8 DCV01 ® FIGURE 2. Connecting Dual Outputs in Series. Connecting the DCV01 in Series Multiple DCV01 isolated 1W DC/DC converters can be connected in series to provide nonstandard voltage rails. This is possible by utilizing the floating outputs provided by the DCV01’s galvanic isolation. Connect the positive VOUT from one DCV01 to the negative VOUT (0V) of another (see Figure 1). If the SYNCIN pins are tied together, the self-synchronization feature of the DCV01 will prevent beat frequencies on the voltage rails. The SYNCIN feature of the DCV01 allows easy series connec- tion without external filtering, minimizing cost. The outputs on dual output DCV01 versions can also be connected in series to provide two times the magnitude of VOUT as shown in Figure 2. For example, a dual 15V DCV01 could be connected to provide a 30V rail. Connecting the DCV01 in Parallel If the output power from one DCV01 is not sufficient, it is possible to parallel the outputs of multiple DCV01s, as shown in Figure 3. Again, the SYNCIN feature allows easy synchronization to prevent power-rail beat frequencies at no additional filtering cost. PCB LAYOUT Ripple and Noise Careful consideration should be given to the layout of the PCB in order that the best results can be obtained. The DCV01 is a switching power supply and as such can place high peak current demands on the input supply. In order to avoid the supply falling momentarily during the fast switching pulses ground and power planes should be used to track the power to the input of DCV01. If this is not possible then the supplies must be connected in a star formation with the tracks made as wide as possible. If the SYNCIN pin is being used then the tracking between device SYNCIN pins should be short to avoid stray capaci- tance. If the SYNCIN pin is not being used it is advisable to place a guard ring, (connected to input ground) around this pin to avoid any noise pick up. The output should be taken from the device using ground and power planes, this will ensure minimum losses. A good quality low ESR capacitor placed as close as practicable across the input will reduce reflected ripple and ensure a smooth start up. A good quality low ESR capacitor placed as close as practicable across the rectifier output terminal and output ground will give the best ripple and noise performance. THERMAL MANAGEMENT Due to the high power density of this device it is advisable to provide ground planes on the input and output. FIGURE 3. Connecting Multiple DCV01s in Parallel. DCV 01 +V OUT V SUPPLY +V OUT –V OUT –V OUT 0V V S 0V COM DCV 01 0V 0V V OUT V SUPPLY V S 0V DCV 01 V OUT 2 x Power Out SYNC IN SYNC IN V S 0V COM |
Similar Part No. - DCV012405P-U |
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