Industry Related | Power Management Chip How To Choose?
2024-05-01 10:00:00
Power management through a certain circuit topology, the different power input into the system to meet the needs of the output voltage. The Power supply directly affects the system performance, and the key component that determines the performance of the power supply is the Power Management Integrated Circuits (PMIC).
The largest application field of PMIC is electronic consumer products, telecommunications, industrial control equipment, automotive terminals and other fields also have continuous demand for PMIC. All electronic devices have a power supply, but different systems have different requirements for power supply. In order to exert the performance of the electronic system, it is necessary to choose the appropriate power management mode.
1. Basic Knowledge Of Power Conversion
Choosing The Appropriate Power Management Element Depends On The Input And Output Conditions Of The Application.
Is The Power Input AC Or DC?
Is The Input Voltage Higher Or Lower Than The Desired Output Voltage?
What Is The Required Load Current?
Is The Load Sensitive To Noise, Or Requires Constant Current (As In LED Applications), Or Is The Current Highly Variable?
Different power conversion components are selected for each application based on its specific needs. The following figure shows several application examples and their typical commonly used power conversion components;
Figure 1. Application examples of power management
It is clear from the above examples that various parameters must be considered for optimal component selection. These parameters are described in detail below.
2. Selection Standard Of Power Management IC
In The Design, The First Consideration Is The Voltage Difference From The Input To The Output (VIN - VOUT). When Choosing The Best Power Solution, The Specific Needs Of The Application, Such As Efficiency, Heat Dissipation Limitations, Noise, Complexity And Cost, Must Be Considered.
Table 1. Basic Criteria For The Selection Of Low-Voltage Differential Regulators, Buck, Boost, And Boot-Buck Converters
Trends in power managementBluetooth Low Energy, Wi-Fi 6 And Cellular Iot Are Bringing Connectivity To Low-Power Iot Devices. However, Power Management Requires More Than Efficient Chips, The Electrical Energy From The Battery Or Power Supply Must Also Be Regulated And Distributed, And Sometimes Charged If The Device Is Powered By A Rechargeable Battery. This Means That No Matter How Efficient The Processor, Radio And Memory In The Wireless Chip Are, If The Power Management System Is Not Optimized Enough, It Will Affect Battery Life.
Building An Efficient Power Management System Is Already A Difficult Task, But Achieving A Compact Design Is Even More Challenging. Space In Many Iot Products Is Limited, But Traditional Power Management Solutions Often Consist Of Multiple Chips, Such As Regulators, Battery Chargers, Voltmeters, External Watchdog And Hard Reset Devices, Which All Take Up Valuable Space.
Nordic Solves Both The Efficiency And Space Challenges Of Power Management With The NPM Series Power Management IC (PMIC). The Latest In The Family, The NPM1300, Features A High-Precision Coulometer That Accurately Measures The Remaining Battery Power, Extending The Battery Life Of Iot Devices.
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