Ultra-wide voltage power solution

Abstract: Non-isolated wide voltage input range of the high voltage battery buck wide voltage input buck DC-DC converter AC-DC converter power supply Industrial Control Instrumentation wide voltage auxiliary power supply module <br> <br> design features:

• Ultra-wide input voltage range (10-265VAC or 13-400VDC)

• Extremely high energy efficiency • Up to 65% efficiency

Very low power consumption: Typical standby power consumption is less than 6mW (@ with 100uA load)

Application area:

• Extremely wide input voltage range for battery powered applications (DCs for power car systems, photovoltaic systems, UPS uninterruptible power supplies, EPS emergency power supplies, photovoltaic inverters, wind/solar hybrid controllers, power battery protection boards, BMS battery management systems, etc. -DC conversion power supply module);

• Power supply control of industrial appliances (especially auxiliary power supplies for industrial control of wide voltage input ranges, such as instrumentation, smart meters, automated meters, timers, industrial equipment, etc.);

• Power supply control for household appliances (such as WIFI outlets, rice cookers, dishwashers, and other white goods);

• Other non-isolated applications such as night lights, LED drives, meters, and residential heating controllers.

Design Overview:

In some special applications, the power system needs to operate normally over a wide range of voltages, such as photovoltaic systems, UPS, etc. Especially in the industrial field, the voltage of the power grid is often changed by changes in the power load. It is particularly serious when the load is large.

In addition, interference spikes in the on-site environment are also superimposed on the input voltage and enter the power supply circuit together, so that the power supply chip or other components that are normally supplied under harsh environments are extremely vulnerable to damage.

The ultra-wide input voltage converter power supply designed in this paper can work normally in the input range of 10 to 265 VAC (or 13-400 VDC) (with a wide input voltage and a large tolerance for the external voltage to ensure The external power supply will not damage the system if it fluctuates greatly.

At the same time to have a stable output voltage and a certain load capacity to ensure that the entire system can work stably), applicable to the AC voltage of the global voltage range can also use the battery (24V, 36V, 48V, 96V, 240V, 360V .. .. etc.) Power supply. At the same time, it is also convenient to use 110V voltage or 220 voltage, or to use the battery voltage directly. It can be applied to the power supply voltages of various countries in the world, including 100VAC in Japan, 230VAC in Europe, and even 120/208VAC in the United States, and batteries. Supply voltage (24V, 36V, 48V, 96V, 240V, 360V, etc.).

working principle:

This design uses a micropower wide voltage DC-DC power supply module and 4-5 peripheral parts to achieve a 5V, 200mA (or 12V, 120mA)

Ultra-wide input voltage range (10-265VAC, or 13-400VDC) power supply. Applications for such power supplies include auxiliary power supplies for industrial control.

Ultra-wide voltage input DC/DC step-down converter Some power car systems and some industrial applications often require a wide input voltage DC auxiliary power supply. The circuit shown in Figure 1 is a typical output with 5V and 200mA. Isolated buck power supply. It is usually applied to battery (group) power supply applications where the input voltage varies greatly.

Such as power car systems, photovoltaic systems, UPS uninterruptible power supply, EPS emergency power supply, photovoltaic inverter, wind and solar power controllers, power battery protection board, BMS battery management system and other DC-DC conversion power supply module.

Power module

2. Ultra-wide voltage input AC/DC step-down converter The circuit shown in Figure 2 is a typical 12V, 120mA non-isolated power supply. It is usually applied to the control of industrial appliances (such as instrumentation, timers, industrial equipment, etc.) and the control of home appliances (such as WIFI outlets, rice cookers, dishwashers, and other white goods). This circuit is also suitable for other non-isolated power applications such as night lights, LED drives, meters, and residential heating controllers.

Power module

Component selection:

R1 current limiting resistor, depending on the input voltage range and output current.

C1 filter capacitor, it is recommended to use 0.47uF ~ 100uF electrolytic capacitor, the specific need to be based on the input voltage range and output current.

C2 uses 47uF/25V electrolytic capacitor.

C3 output filter capacitor, it is recommended to use 47uF ~ 220uF.

Z1 is not more than 12V for output modules below 12V; it is not more than 15V for 12V output modules.

Note: If the quiescent current requirements are relatively stringent, it is recommended that capacitors C1~C3 have smaller leakage currents.

The DC-DC converter in the circuit diagram is a DC-DC power module with ultra-low power consumption and wide voltage input range. It has wide input voltage, high conversion efficiency, small size, high and low temperature characteristics, and strong load capacity. Features, reference model:

PI-3V3-B4, PI-05V-B4, PE-12V-B4 (see Table 1 for details).

Table 1: Comparison of DC/DC Converter Model Selection and Parameters

No.

model

Input (AC)

Input (DC)

The output voltage

Output current

main feature

typical application

1

PI-3V3-B4

9V-265V

13V-380V

3.3V

200mA

Non-isolated, wide voltage input, low power, small size, built-in LDO

1) Ultra-wide voltage input AC/DC, DC/DC power converter

2) Single FireWire Smart Switch

2

PI-05V-B4

9V-265V

13V-380V

5.0V

200mA

Non-isolated, wide voltage input, low power, small size, built-in LDO

1) Ultra-wide voltage input AC/DC, DC/DC power converter

2) Single FireWire Smart Switch

3

PE-12V-B4

10V-265V

15V-380V

12V

120mA

Non-isolated, wide voltage input, low power, small size, no internal LDO

Ultra-wide voltage input AC/DC, DC/DC power converter

Remarks: The above data is for reference only. Please read the manufacturer's specifications for details. For other models and parameters, please contact the manufacturer for customization.


Characteristic curve:

The following is a description of the wide voltage power supply consisting of PE-12V-B4.

1. Input voltage VS input current

Power module


2. Input voltage VS output current (output curve at input voltage in low voltage section)

Power module


The practical application shows that the above wide voltage power supply design solution can effectively ensure the stability of the output voltage when a wide range of input and input voltage changes. The power supply circuit has the advantages of wide input voltage, high efficiency, and stable output, and can be applied to an ultra-wide input voltage. Range of power supply systems.

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