Original question:
TINA/Spice/TL783: Are there any other regulators for voltages above 120V?
Hi, first of all i need to rectify from a trasnformer (220VACin / 110VACout 10A) and want to use te fig. 15 from tl783 Datasheet some like this
My cuestions are: can i replace q3 with BUV21 for more current? which PNP should i use?
and the last one there is an easy way from stepping down the 150Vcc in my tranformer output with high current? because it will blow the tl783. the 110 x sqrt(2) ones
thanks you so much
Hi Nicolas,
Figure 15 from the TL783 datasheet is simply an example of how to use an external pass element (Q3) to increase the current flowing from Vin to Vout in the system. The current will pass through this transistor, TL783 is simply used to regulate the voltage.
You may use this example and change the components to suite your specific application needs; however, it is highly recommended that you prototype your solution to ensure that it fits your application requirements. The example in Figure 15 is based off of the 0.5 A example shown in figure 14.
Please note that your schematic is missing a critical connection between the TL783 OUT pin and the system Vout. Please also keep in mind that this application example is assuming a Vin of 125 Vdc. You must rectify your input voltage first.
Very Respectfully,
Ryan
Hi Nicolas,
In the example given in Figure 14, TIP30C was used. The example applications are meant only to help give you an idea of how you can use TL783. As stated in my previous response, you may make modifications and switch components to better suite your application requirements.
When selecting transistors and even other components like resistors and capacitors, it is important that you refer to their datasheets provided by the manufacturer. TIPL762 is rated to 6 A. As such, if you would like to modify the example to 10 A, it would be recommended to select a different transistor. It is your responsibility to ensure that your application requirements are met.
Very Respectfully,
Ryan
