The isolated power module can efficiently solve various port interferences, the switch chip converts the voltage required by various systems, and the LDO provides stable and reliable power to the MCU processor. The power module and the chip solution need to complement each other, and each of them can build a good system power supply environment and open a win-win situation at the same time.
With the power module and MPS power chip, how should we take advantage of each other? How do you apply them to the circuit to solve the actual problems you are experiencing? Below we will give a general introduction from the three aspects of module products to solve interface interference, MPS chip to solve various voltage requirements in the board level and MPS module products to solve compact product design.
Figure 1 complete power solution
First, isolate the power module and interface module to solve the interface interference problem:
In an era of highly developed electronic technology, various products and devices are constantly appearing, and interconnection between devices and devices is also indispensable. Due to the difference in ground potential between different devices, directly interconnecting the devices will have a ground circulation between the ground lines, thus affecting the normal communication of the interfaces. Taking CAN-bus as an example, there are more and more CAN-bus networks, and the possibility of large ground potential difference, high common mode voltage, and strong electromagnetic radiation for CAN-bus long-distance applications is greatly increased. We have solved this problem by introducing a micro power supply and interface module.
Figure 2 Isolated power module and interface module
Recommended model: CTM1051KT
Isolation withstand voltage: 3500VDC
Operating temperature range: -40 ° C ~ +105 ° C
Transmission baud rate: 40k~1M
Single network can connect at least 110 nodes
High EMS immunity
Second, to solve the power supply voltage requirements of various system boards:
How to design a suitable system power supply? First we need to determine the system input supply voltage and type, and secondly determine which types of voltages are present in the system, and determine the current requirements of each part of the circuit. Then select the appropriate power chip design circuit according to actual needs.
The MPS can provide a complete power supply solution from the 220VAC input to the 3.3V, 1.8V voltage used by the MCU. The following describes the basic application characteristics of the MPS AC-DC power supply, switching buck power supply, and dual LDO:
Figure 3 isolated AC-DC application
Model and features:
Recommended model: MP020-5
Integrated 700V MOSFET
Primary feedback, no optocoupler feedback required
Simple circuit and low cost
Ultra low standby power consumption to 30mW
Applicable power level (5W~10W)
Figure 4 Non-isolated DC-DC application
Model and features:
Recommended model: MP4423
4-30V input voltage range
Internally integrated dual MOSFETs saves freewheeling diodes
Simple circuit and small size
Figure 5 Dual LDO application
Model and features:
Recommended model: MP20041
Dual LDO, saving size and cost
Multiple voltage options (1.2V, 1.8V, 2.5V, 2.8V, 3.0V, 3.3V)
Separate enable control
Third, MPS module products guarantee compact product design:
In addition to the need for high-efficiency and easy-to-design non-isolated DC-DC power supplies, the current miniaturized product design also places great demands on space volume. In order to save customers more space, MPS has introduced modules with inductors and diodes. Only need 3*5mm PCB space to realize 3A current output capability, only two voltage divider resistors are needed in the periphery, and input and output capacitors can be added.
Figure 6 Modular non-isolated power chip
As can be seen from the above description, the ZLG micro power supply module can make up for the cost and volume of the micro-power supply of the chip design, and the design of the interface module can save space and greatly improve the reliability of the product. The MPS switching power supply chip can flexibly design the output power supply voltage while providing high efficiency and small volume non-isolated applications. The ZLG power module and the MPS power chip work together to provide a high-quality power supply for your system, allowing your product to fly.
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