LM317/337 1.3V~42V Positive /Negative Adjustable Voltage Power Regulator Board

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LM317/337 1.3V~42V Positive /Negative Adjustable Voltage Power Regulator Board
Product Description
WZ-68 high-quality ultra-small precision adjustable power supply, can be fixed on the fixed three-side regulator 78xx series
WZ-69 high-quality ultra-small precision adjustable power supply, can be fixed on the fixed three-terminal negative regulator 79xx series
This board adopts double-sided solder joint design, please pay attention to the positive and negative power supply, finished plate without heat sink, such as high current please add their own radiator.
PCB size of about 20x42mm, finished high about 16mm.
① rectifier part of the introduction of Maranton's grounding concept, so that greatly reduced ground interference.
② design principle is a small volume to facilitate the installation of the machine,
③ pay great attention to good decoupling.
④ voltage adjustment with precision multi-turn adjustable resistance, leaving the resistance of the installation bit (from the performance considerations we recommend the need to adjust the voltage after the fixed resistor instead).
⑤ board output can be ± 1.3V-42V adjustable (need a wider voltage, please note that the pressure and capacitance voltage).
From the regulator performance and power considerations, the input DC slightly larger than the required output DC can, such as DC9V out, available DC12V input.
Application example:
A: WZ-68 for the positive power regulator module, the pin has been fixed three-terminal regulator arrangement, respectively: input - ground - output.
Can be directly replace the common positive three-terminal regulator, such as 7805/7812/7824 and other full range of values, after loading into the corresponding voltage can be.
The circuit of the ripple and other indicators than the fixed three-terminal regulator has greatly improved, theoretically used in digital circuits can reduce (digital sound).
B: WZ-69 for the negative power regulator module, the pin has been negative fixed three-terminal regulator arrangement, respectively: ground - input - output.
Can be directly replace the common negative fixed three-terminal regulator, such as 7905/7912/7924 and other full range of values, after loading into the corresponding voltage can be.
The circuit of the ripple and other indicators than the fixed three-terminal regulator has greatly improved, theoretically used in digital circuits can reduce (digital sound).
C: Use WZ-68 and WZ-69, can be composed of ultra-small high-quality positive and negative adjustable power supply, easy to add in the CD or DAC and other machines,
The introduction of the original machine before and after the regulator can be positive and negative DC power supply, the board output for the number of analog circuits such as the need for independent power supply to facilitate the place.
D: Use 2pcs WZ-68, can be composed of ultra-small high-quality two-way adjustable power supply, can be used in optical drive and other places.
Finished plate are issued before the transfer to about 5V, after you received after the adjustment to their own required voltage.
Note: The output voltage value Uo = [(VR / R) +1] x1.25V.
Frequently Asked Questions Reply:
① how much current of the board can output ?
A: The output current and pressure cooling, etc., according to the board configuration recommended low pressure 20mA application. The core device is able to output 1.5A, but the high current application, please be sure to strengthen the heat, control pressure.
Normal work best not full load, is conducive to stable operation of the device.
② Does the board only work in DC1.5-35V voltage?
A: Taking into account the majority of friends are used for analog circuits, so our output capacitor selection of 50V pressure, this can only work in DC45V following security. There is a special demand for friends please change their own high voltage electrolysis, so that output DC200V can, the key is to control the input and output pressure.
NOTE:LM317 / lm337 is pre-owned but tested good!!
Package Included:QTY & TYP as your choice(
price is for one!!!!!
)
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Delivery details
>tems will be shipped within 1~2 business day after payment received.
> Items are shipped from China using Airmail, delivery time depends on destination and other factors,reach most of the countries within 10 to 35 business days.
> if you choose the standard shipping method or SpeedPAK the item will get to you with in 20 days.
Country
Shipping Way
Shipping Time
Tracking Number
United States
SpeedPAK
7-18
Yes
Russian
Post by Air Mail
15-35
Yes
Other Country
Post by Air Mail
15-45
No
Brazil / Africa
Post by Air Mail
35-65
No
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We stand behind our products 100% and carefully inspected by us.
Customers may request for an exchange or refund less shipping & handng within 30 days of receipt.
Return of non-defective or wrongly purchased items will be subject to a 20% restocking fee.
Product must be returned in is original packaging.
Buyers are responsible for paying the return shipping & handing charges for any replacement or refund request.
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