KD3300 DC Power Supply Series User Manual
Manufacturer: DONGGUAN KORAD TECHNOLOGY CO., LTD.
Address: F9, Building D2, Kechuang Center, Songshan Lake Intelligent Valley, No. 7 Yanhe North Road, Liaobu Town, Dongguan City, Guangdong Province.
Contact: Tel: +86-769-81111584 | Fax: +86-769-81111804 | E-mail: krissy@koradtechnology.com
Websites: www.koradtechnology.com | www.korad.com.cn
Main Features
- 10mV/1mA high resolution
- Low ripple & Low noise
- Series and parallel functions
- Cooling fan controlled by heatsink temperature
- Constant voltage/constant current operation
- Digital panel control
- 4 digits display
- Software calibration
- Button lock function
- Output ON/OFF control
- Standard interfaces: USB, RS232 & LAN (only for KD3303P & KD3305P)
Safety Instructions
Safety Guidelines
- Do not block or obstruct the cooling fan vent opening.
- Avoid severe impacts or rough handling that leads to damage.
- Do not discharge static electricity.
- Do not disassemble unless you are qualified as service personnel.
AC Input Requirements
AC Input voltage: 110V / 120V / 220V / 230V, 50 / 60Hz
Grounding: Connect the protective grounding conductor of the AC power cord to an earth ground to avoid electrical shock. ⚠️
Operation Environment
- Location: Indoor, no direct sunlight, dust free, almost non-conductive pollution.
- Relative Humidity: <80%
- Altitude: <2000m
- Temperature: 0-40℃
Storage Environment
- Location: Indoor
- Relative Humidity: <70%
- Temperature: -10-70℃
Fuse Information
Fuse Replacement: To ensure fire protection, replace the fuse only with the specified type and rating. Disconnect the power cord before fuse replacement. Ensure the cause of fuse blowout is fixed before replacing the fuse.
| Model | 110/120V | 220/230V |
|---|---|---|
| KD3303 | T6A/250V | T3A/250V |
| KD3305 | T10A/250V | T5A/250V |
Input Current (220V): KD3303D - 2.11A, KD3303P - 2.12A; KD3305D - 3.22A, KD3305P - 3.23A
Specifications
Note: The specifications below are tested under the conditions of 25 °C ±5 °C and a 20-minute warm-up period.
| Specifications | KD3303D/P | KD3305D/P |
|---|---|---|
| Voltage Range | 0-30V | 0-30V |
| Current Range | 0-3A | 0-5A |
| Load Regulation | ||
| Voltage | ≤0.01%+3mV | ≤0.01%+5mV |
| Current | ≤0.1%+5mA | ≤0.1%+10mA |
| Line Regulation | ||
| Voltage | ≤0.01%+3mV | ≤0.01%+3mV |
| Current | ≤0.1%+3mA | ≤0.1%+3mA |
| Setup Resolution | ||
| Voltage | 10mV | 10mV |
| Current | 1mA | 1mA |
| Setup Accuracy (25°C ±5°C) | ||
| Voltage | ≤0.5%+20mV | ≤0.5%+20mV |
| Current | ≤0.5%+5mA | ≤0.5%+10mA |
| Ripple (20-20MHz) | ||
| Voltage | ≤1mVrms | ≤2mVrms |
| Current | ≤3mArms | ≤3mArms |
| Temp. Coefficient | ||
| Voltage | ≤150ppm | ≤150ppm |
| Current | ≤150ppm | ≤150ppm |
| Read Back Resolution | ||
| Voltage | 10mV | 10mV |
| Current | 1mA | 1mA |
| Read Back Temp. Coefficient | ||
| Voltage | ≤150ppm | ≤150ppm |
| Current | ≤150ppm | ≤150ppm |
CH3 Specifications
- Voltage Range: 5V / 3.3V / 2.5V
- Current Range: 3A
- Voltage Accuracy: ±50mV
- Load Regulation: ±50mV
Reaction Time
| Parameter | Value |
|---|---|
| Voltage Rise | ≤100mS |
| Voltage Drop (10% Rated load) | ≤100mS |
Weight and Dimensions
Dimensions: 250(W) * 150(H) * 378(D) mm
Weight:
- KD3303D: 7.7kgs
- KD3303P: 7.8kgs
- KD3305D: 10.4kgs
- KD3305P: 10.5kgs
Operation
Adjusting Voltage and Current (CH1/CH2)
To adjust voltage or current for CH1 or CH2: Press the corresponding adjustment knob. The digit to be adjusted will blink. Rotate the knob to increase or decrease the value. Press the knob again to move to the next digit. The corresponding digit indicators will light on and blink during adjustment.
Adjusting Voltage (CH3)
To select the voltage for CH3: Press and hold the CH3 button for 2 seconds. The voltage will cycle through 2.5V, 3.3V, and 5V. The indicator for the selected voltage will light up.
Series and Parallel Operation
Series Operation
To enable series operation: Press and hold the SER button for 1 second. The SER indicator will light up, indicating series mode. In this mode, CH2 acts as the master and CH1 as the slave, with CH1's operation shielded. Press the ON/OFF button to control the output. The connection diagram shows CH1 output connected to CH2 input, and CH2 output connected to the load.
Maximum Voltage in Series: 60V (for KD3303D/KD3303P/KD3305D/KD3305P)
Maximum Current in Series: 3A (for KD3303D/KD3303P), 5A (for KD3305D/KD3305P)
Parallel Operation
To enable parallel operation: Press and hold the PARA button for 1 second. The PARA indicator will light up, indicating parallel mode. In this mode, CH2 acts as the master and CH1 as the slave, with CH1's operation shielded. Press the ON/OFF button to control the output. The connection diagram shows both CH1 and CH2 outputs connected in parallel to the load.
Front Panel Description
The front panel features digital displays for voltage and current. It includes adjustment knobs for voltage and current on CH1 and CH2. Control buttons are available for Parallel (PARA), Series (SER), CH3 voltage selection, Output ON/OFF, and Power. Interface ports for USB, RS232, and LAN are also present, along with output terminals and grounding points for CH1 and CH2.
Rear Panel Description
The rear panel is equipped with a power socket, a ventilation hole, and warning labels (CE, "REMOVE COVER"). Interface ports for USB, RS232, and LAN are also located on the rear panel.
