INTRODUCTION
This series of 100W Switching Mode Power Supplies with Current Limiting Control is designed with the objectives
of high accuracy, compactness and easy portability. Rotary encoder tuning with MCU are used for voltage and
current control. 4 digit display LCD of voltage and current for high precision.
This power supply is ideal for trouble shooting circuit boards or devices which require two or three different input
voltages such as 3V or 5V, 12V and 1-36V. This power supply can provide 3 outputs at the same time.
All three outputs are fully isolated so different cross connections of 2 or 3 outputs can provide various fixed or
variable output voltages. Any output can be connected for positive or negative polarity. (See connection diagrams)
CONTROLS AND INDICATORS
1. Power Switch:
- Turns the power supply on–off, when it is on the front display lights up.
2. AC Input Socket with Fuse
3. Concealed Fuse box (ply open the cover to get to the fuse)
4. 3.3V/5VDC selection switch (for Aux output 1)
5. Output Voltage Tuning knob. (Quick push the knob to toggle the coarse and fine tuning)
6. Output Current Tuning knob. (Quick push the knob to toggle the coarse and fine tuning)
7. Output On/Off push button
- For Main output: Quick push this button to turn the Main output ON/OFF
- For Main output & Aux outputs: Push and hold this button for 3 seconds to turn the Main and Aux outputs
OFF, quick push this button again to turn them ON
8. Main Output Terminal Positive (+) Red color.
9. Main Output Terminal Negative (-) Black color
10. Aux Output 1 Terminal Positive (+) Red color (3.3VDC or 5VDC selectable)
11. Aux Output 1 Terminal Negative (-) Black color (3.3VDC or 5VDC selectable)
12. Aux Output 2 Terminal Positive (+) Red color (Fixed 12VDC)
13. Aux Output 2 Terminal negative (-) Black color (Fixed 12VDC)
14. LCD Display panel showing:
- 4 digit voltmeter, Ammeter, (CV) constant voltage mode, (CC) constant current mode,
- Output Terminal on/off state
- 2 digit Aux outputs Ammeter
15. Aux 1 output voltage indicator
16. Reserved (factory internal use only)
17. Ground Terminal
