Hier werden die Unterschiede zwischen zwei Versionen angezeigt.
Nächste Überarbeitung | Vorhergehende Überarbeitung | ||
uln-power-supply [2016/02/11 17:49] karl angelegt |
uln-power-supply [2017/04/04 06:45] (aktuell) karl [OSH-Park] |
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====== Ultra Low Noise Linear Power Supply, using LT3042 ====== | ====== Ultra Low Noise Linear Power Supply, using LT3042 ====== | ||
+ | {{ : | ||
- | Small power regulator | + | Small power regulator |
+ | * 78xx as a pre-regulator, | ||
* Output voltage: 0-15V | * Output voltage: 0-15V | ||
* Output current: max. 200mA | * Output current: max. 200mA | ||
* Input voltage: max. 20VAC | * Input voltage: max. 20VAC | ||
+ | ===== Setting the Voltage ===== | ||
+ | The LT3042 has a very nice way to set the output voltage. | ||
+ | Instead of using an internal voltage reference and an external voltage devider, a constant current is driven through a user settable resistance, which is then the reference voltage! | ||
- | + | U_out = 100uA * R1||R2 | |
- | {{ : | + | e.g. with R1||R2 = 50kΩ, U_out = 5V |
===== Schematic ===== | ===== Schematic ===== | ||
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===== KiCad project ===== | ===== KiCad project ===== | ||
{{: | {{: | ||
+ | |||
+ | ===== OSH-Park ===== | ||
+ | You can directly order this PCB from oshpark.com | ||
+ | |||
+ | < | ||
+ | <a href=" | ||
+ | </ | ||
+ | |||
+ | {{tag> |