NB/T 10285-2019Fixed voltage input and unregulated output isolated DC-DC module power supply (English PDF)

3.1 Single inline package; SIP

Two rows of pins are drawn from one or both sides of the package, and the pin pitch is an integer multiple of 2.54 mm (tenth of an inch).

3.2 Dual inline package; DIP

Two rows of pins are drawn from one or both sides of the package, and the pin pitch is an integer multiple of 2.54 mm (tenth of an inch).

3.3 Surface mount devices; SMD

A component mounted on the surface of a printed circuit board.

3.4 Conversion efficiency

The ratio of total output power to input power.

4.1 General

This standard recommends the following packaging modes.

The following recommended packaging modes are generally suitable for module power supplies with power below 3 W, and are encouraged to be applied to higher power module power supplies.

For the housing material of the module power supply, this standard recommends the use of insulating materials.

All the following dimensions are in millimeters (mm), the terminal section tolerance is ±0.10 mm, and the remaining dimension tolerances are ±0.5 mm.

The English representations in the following pin mode table are. GND-input ground, Vin-input positive, 0V-output ground, Vo-output positive, -Vo-output Negative, NC- forbidden connection pin, No Pin-no pin.

4.2 SIP encapsulation mode

The package mode shown in Figure 1 and Figure 2 is recommended for module power supplies with a withstand voltage of 1 500 V DC and below.

The module power supply with a withstand voltage of 3 000 V DC is recommended to adopt the package mode shown in Figure 3.

The module power supply with a withstand voltage of 6 000 V DC is recommended to adopt the package mode shown in Figure 4.

4.3 DIP package mode

The module power supply with withstand voltage of 1 500 V DC and below is recommended to adopt the packaging modes shown in Figure 5 and Figure 6.

The module power supply with a withstand voltage of 3 000 V DC is recommended to adopt the package mode shown in Figure 7.

The package mode shown in Figure 8 is recommended for the module power supply with a withstand voltage of 6 000 V DC.

4.4 SMD packaging mode

The package mode shown in Figure 9 is recommended for dual output module power supplies with a withstand voltage of 3 000 V DC and below.

The package mode shown in Figure 10 is recommended for single output module power supplies with a withstand voltage of 3 000 V DC and below.

The package mode shown in Figure 11 is recommended for the module power supply with a withstand voltage of 6 000 V DC.

5.1 Operating temperature range

The operating temperature range of the module power supply should be specified, and one of the following ranges should be selected first. At a given maximum temperature and maximum rated output Power and under the most unfavorable environmental conditions with natural cooling (natural air cooling) at an altitude of 2 000 m, the manufacturer shall confirm that the module power supply can be continuous Operation without derating. When the temperature rises, the derating of the output current and output power should be clearly marked. If the module power supply adopts forced air cooling or conduction Cooling, then the operating conditions should be clearly defined, and the equipment should be tested under this cooling condition.

5.3 Shell temperature rise when the product is working

When the product is working, the temperature of the device should not exceed the maximum temperature that the monomer can withstand. It is recommended that the temperature rise of the shell is typically 25 K.

Note: What is specified here is the temperature rise value of potting products.

5.4 Input DC voltage variation range

The input DC voltage variation range should be within ±10% of the following recommended input DC voltage nominal value.

The following values are recommended for the nominal input DC voltage. 3.3 V, 5 V, 9 V, 12 V, 15 V, 24 V.

5.5 Output voltage accuracy

When the nominal input voltage and output are fully loaded, the output voltage accuracy at this time should be marked, and the following values are recommended.

5.6 Voltage regulation rate

Within the specified input voltage range and output rated load, the adjustment rate of each output voltage should be marked, and the following values are recommended.

5.7 Load regulation

For each output, the load regulation rate should be specified in the 10%~100% load range and the nominal input voltage, and recommended as The following values.

5.7 Requirements

Not more than 1°C/min) to the upper limit of working temperature (±2°C above t), the module power supply works for 2 hours under constant temperature, constant temperature Measure and record the output voltage value of the module power supply every 15 minutes during working hours;

5.8 Temperature adjustment rate

The temperature adjustment rate should be marked and recommended as the following values.

In practical applications, the temperature adjustment rate is a controllable parameter. It is recommended to use the graph of the output voltage changing with temperature

5.9 Conversion efficiency

The input voltage is the nominal value, and the conversion efficiency under the rated load should be.

a) The output voltage is below 5V. the conversion efficiency is 75% typical;

b) The output voltage is 5 V and above. the conversion efficiency is 80% typical.

Note: The difference between the minimum conversion efficiency of the module power supply and the typical value should not exceed 5%.

5.10 Output ripple and noise

The output ripple and noise of the module power supply should be specified, and should not be greater than the preferred value recommended in Table 1 below.

5.11 Switching frequency

The switching frequency of the module power supply is in the range of 35 kHz to 600 kHz.

The switching frequency is allowed to be higher than the above range, which shall be declared by the manufacturer.

5.12 Short circuit protection

Must have short-circuit protection function, and the module with short-circuit protection function should be able to automatically limit the current when the output of the It should be able to resume work automatically in case of failure.

5.13 No-load power consumption

When the output is not loaded, the product of the input voltage and input current of the module power supply is recommended as the preferred value in Table 2 below.

5.14 Insulation characteristics

5.14.1 Insulation strength

The input and output should be able to withstand the corresponding withstand voltage; the duration is 1 minute, no breakdown, no arcing, and leakage current <= 1 mA. This standard recommends the following withstand voltage values.

Note: Other withstand voltage values are allowed and self-declared by the manufacturer.

5.14.2 Insulation resistance

Apply a DC voltage of 500V between the input and output, between the input and output and the housing, and the insulation resistance obtained by the test should not be less than 1 000 M ohm.

5.15 Isolation capacitor

Should meet the requirements of 5.22 in NB/T 42039-2014.

5.16 Environmental requirements

To be more conducive to environmental protection, the module power supply should meet RoHS requirements.

6.1 Preparation before test

6.1.1 Test environmental conditions

According to NB/T 42039-2014, 6.1.

6.1.2 The basic performance index test circuit diagram is shown in Figure 12.

6.2 Input DC voltage variation range test

6.2.1 The test circuit is shown in Figure 12.

6.2.2 Test method and procedure a) Connect the test circuit according to Figure 12;

b) Start the DC adjustable regulated power supply, adjust its input voltage to the nominal value of the module power supply input voltage, and adjust the load resistance to make the output The output current reaches the rated value;

c) Adjust the input voltage of the module power supply to the upper limit and lower limit respectively, and the result should meet the requirements of 5.4.

6.3 Output characteristic test

6.3.1 Output voltage accuracy test

The test method is carried out in accordance with the provisions of NB/T 42039-2014 6.3.1, and the test results should meet the requirements of 5.5.

6.3.2 Voltage adjustment rate test

6.3.2.1 The test circuit is shown in Figure 12.

6.3.2.2 Test method and procedure a) Connect the test circuit according to Figure 12;

b) Start the DC adjustable regulated power supply and module power supply, adjust the input voltage of the module power supply to the nominal value, and adjust the load resistance to make the output The output current reaches the rated value; adjust the input voltage within the allowable variation range, and measure the corresponding maximum and minimum output voltage,

6.3.3 Load voltage adjustment rate test

6.3.3.1 The test circuit is shown in Figure 12.

6.3.3.2 Test method and procedure

6.3.3.3 The test circuit is shown in Figure 13.

e) Calculate the temperature coefficient of the module power supply when the temperature drops and rise according to formulas (5) and (6), and the results should conform to 5.8 Requirements.

6.3.3.4 Test methods and procedures a) Place the module power supply in the thermostat and connect the test circuit according to Figure 13;

b) Start the module power supply, adjust the input voltage to the nominal value, the output current to the rated value, and control the temperature in the thermostat to (25°C± 2°C), after the module power supply reaches thermal equilibrium and works stably (the temperature difference read every 5min for 3 times does not exceed 1°C), record Record the output voltage value at this time;

c) Control the temperature in the thermostat to the lower limit of the working temperature (±2°C at t) (the average change within 5 minutes is not more than 1°C/min). mold The block power supply works for 2 hours in the incubator state, and the output of the module power supply is measured and recorded every 15 minutes during the incubator working time. Output voltage value;

d) Control the temperature in the thermostat to rise from the lower limit of the working temperature (keep it for 30 minutes when it rises to 0°C, and change averagely within 5 minutes)

6.3.4 Output ripple and noise test

The test method is carried out in accordance with 6.3.9 of NB/T 42039-2014, and the test results should meet the requirements of Table 1.

6.3.5 Switching frequency test

The test method is carried out in accordance with the provisions of NB/T 42039-2014 in 6.3.10, and the test results should meet the requirements of 5.11.

6.4 Efficiency test

The test method is carried out in accordance with 6.3.8 of NB/T 42039-2014, and the test results should meet the requirements of 5.9.

6.5 No-load power consumption test

6.5.1 The test circuit is shown in Figure 12.

6.5.2 Test method and procedure a) Connect the test circuit according to Figure 12;

b) Adjust the input voltage to the nominal value, do not connect the load resistance, and wait for a stable operation without load;

c) Measure the input current value when working with no load. Calculate the no-load power consumption according to formula (7), and the result should meet the requirements of 5.13.

a) Connect the test circuit according to Figure 12;

b) Start the DC adjustable regulated power supply and the module power supply, adjust the input voltage of the module power supply to the nominal value; respectively measure 10% load And the output voltage value corresponding to 100% load, the load voltage adjustment rate is calculated according to the following formula (4), and the result should conform to […]

6.6 Shell temperature rise test during product operation

The test method is carried out in accordance with the provisions of 6.5.3 in NB/T 42039-2014, and the test results should meet the requirements of 5.3.

6.7 Short circuit protection test

The test method is carried out in accordance with the provisions of 6.4.4 in NB/T 42039-2014, and the test results should meet the requirements of 5.12.

6.8 Visual inspection

According to the requirements of product package size and tolerance described in Chapter 4.

6.9 Insulation test

6.9.1 Insulation resistance test

The test method is carried out in accordance with the provisions of 6.6.1 in NB/T 42039-2014, and the test results should meet the requirements of 5.14.2.

6.9.2 Dielectric strength test

The test method is carried out in accordance with the provisions of 6.6.2 of NB/T 42039-2014, and the test results should meet the requirements of 5.14.1.

6.10 Isolation capacitance test

The test method is carried out in accordance with 6.6.3 of NB/T 42039-2014, and the test result should meet the requirements of 5.15.

6.11 Environmental condition test

6.11.1 Low temperature test

6.11.1.1 Low temperature storage test

The test method is carried out in accordance with 6.7.1.1 of NB/T 42039-2014, and the test results should meet the requirements of relevant performance indicators.

6.11.1.2 Low temperature working test

The test method is carried out in accordance with the provisions of NB/T 42039-2014, 6.7.1.2, and the test results should meet the requirements of relevant performance indicators.

6.11.2 High temperature test

6.11.2.1 High temperature storage test

The test method is carried out in accordance with 6.7.2.1 of NB/T 42039-2014, and the test results should meet the requirements of relevant performance indicators.

6.11.2.2 High temperature work test

The test method is carried out in accordance with the provisions of NB/T 42039-2014, 6.7.2.2, and the test results should meet the requirements of relevant performance indicators.

6.11.3 Constant humidity test

The test method is carried out in accordance with 6.7.3 of NB/T 42039-2014, and the test results should meet the requirements of relevant performance indicators.

6.11.4 Drop test

Except for the following content, the test method is carried out in accordance with the provisions of 6.7.4 in NB/T 42039-2014.

The appearance and performance of the product should be initially tested before the test. The appearance inspection of the product after the test accepts the deformation of the lead or the deterioration of the flatness In the case, it can be manually repaired for normal use. After the test, the product performance needs to ensure that there is no abnormality and should meet the relevant performance index requirements.

6.11.5 Vibration test

The manufacturer can indicate on the product manual whether a vibration test is required.

The tested module power supply is tested according to the requirements and methods specified in GB/T 2423.10 without packaging, and the frequency is (10~55)

Hz, amplitude of 0.35 mm, 30 min in each of the three directions of X, Y, and Z. The test results should meet the requirements of relevant performance indicators.

7.1.1 Factory inspection

7.1.2 Inspection method

Before leaving the factory, all products should undergo electrical performance testing and appearance inspection. The inspection items are shown in Table 3.

7.1.3 Quality judgment

It shall meet the requirements of 7.1.2 in NB/T 42039-2014.

7.1.4 Repeat inspection and judgment

It shall meet the requirements of 7.1.3 in NB/T 42039-2014.

7.2 Type inspection

Type inspection is carried out by periodic inspection, usually once every 1 to 2 years. Type inspection is required for any of the following conditions.

a) The product has been stopped for more than one year (including one year) and resumed production;

b) Appraisal before the product is put into production or production appraisal after transfer;

c) After formal production, there are major changes in structure, materials, and processes;

d) Proposed by the quality supervision agency.

8.1 Product mark

Should meet the requirements of 8.1 in NB/T 42039-2014.

8.2 Packaging

Except for the following content, it shall comply with the regulations in 8.2 of NB/T 42039-2014.

8.2.1 Documents accompanying the product.

a) Product certificate or factory inspection report;

b) Product technical manual.

8.3 Transportation

During the transportation of the product, avoid violent vibration, impact and drop caused by the external packaging.

8.4 Storage