What are the common models of power protection chips?

The power protection chip is a core component in electronic systems that ensures power stability and equipment safety. It has a wide range of models and applications. The following is a systematic review from three dimensions: functional classification, typical models, and application areas, combined with technical characteristics and mainstream market products:
1、 Power protection chip models classified by function
1. Voltage reducing switching power supply chip
LM2576 (TI): A classic buck chip that supports 3.3V-40V input and output current up to 3A. It has built-in overcurrent protection and is widely used in industrial control and vehicle equipment.
TPS5430 (TI): 36V input, 3A output, efficiency up to 95%, suitable for high-power scenarios such as servers and communication base stations.
L5973D (ST): 50V withstand voltage, 2.5A output, integrated overheat protection, commonly used in automotive electronics and LED drivers.
2. Lithium battery protection chip
SC5510 series (Nanxin): Single lithium battery protection, integrated overcharge/overdischarge, charge discharge overcurrent, short circuit protection, adopting DFN-8 packaging, standby current<1 μ A, suitable for TWS earphones and smartwatches.
DW01: Classic lithium battery protection IC, supports 4.2V/4.35V batteries, with overvoltage protection accuracy of ± 25mV, widely used in mobile power supplies and drones.
3. Power Factor Correction (PFC) Controller
BP2628 (Jingfengmingyuan): Critical Continuous Mode (BCM) PFC controller, supporting Gallium Nitride switching transistor, with an efficiency of 98%, built-in overcurrent, overvoltage, and overheat protection, used for high-power LED lighting and PC power supply.
FAN6601 (ON Semi): A dual-mode AC/DC controller that supports adaptive switching between CRM and DCM, integrates X-capacitor discharge and overload protection, and complies with the IEC61000-3-2 harmonic standard.
4. Overvoltage/overcurrent protection chip
LP5300 (Micro Source): Input overvoltage protection (OVP) up to 30V, overcurrent protection (OCP) up to 2A, response time<1 μ s, suitable for USB interfaces and IoT devices.
LPW5208 (Micro Source): Integrated 130m Ω MOSFET, supports dual current limiting of 0.55A/1.1A, built-in soft start, used for portable device power management.
2、 Typical application scenarios and selection suggestions
1. In the field of consumer electronics
Scenario: Smartphones, laptops, TWS earphones.
Selection criteria: low power consumption, high integration, small package size.
Recommended model:
Yingjixin IP5521: TWS earphone charging case SoC, integrated boost conversion, battery display, standby power consumption of 25 μ A.
Lixin Micro ET631XX: CMOS Low Voltage Difference Regulator, with a static current of 0.6 μ A, extends battery life.
2. Industrial and Automotive Electronics
Scenario: Motor drive, vehicle BMS, photovoltaic inverter.
Selection key points: wide temperature operation, high reliability, anti-interference.
Recommended model:
PN6811 (Jewate): Totem Pole PFC Controller, supports -40 ℃ to 125 ℃, integrates undervoltage and over temperature protection, suitable for new energy vehicle charging modules.
LP6656 (MPS): CRM mode PFC controller with an efficiency of 99%, built-in input undervoltage and output overvoltage protection, meeting the EN55022 EMI standard for industrial power supplies.
3. New energy and energy storage systems
Scenario: Photovoltaic inverters, household energy storage, electric vehicles.
Key selection points: high-precision PWM, energy conversion efficiency, multi-level protection.
Recommended model:
HPM6200 (Xianji Semiconductor): RISC-V core, 100ps resolution PWM, supports dual closed-loop control of photovoltaic inverters, and integrates PLA fault protection.
SC8815 (Nanxin): Bidirectional buck boost controller, supports 4.2V-60V input, built-in battery balancing, used for energy storage battery pack management.
4、 Core considerations for selection
Input/output voltage range: matching system power supply requirements (such as 12V/24V for automotive batteries and 24V/48V for industrial equipment).
Protection function integrity: whether overvoltage, overcurrent, overtemperature, and short-circuit protection are complete.
Efficiency and power consumption: Light load efficiency (such as PFM mode), standby current (μ A level).
Packaging and size: miniaturization requirements (such as DFN-8, QFN-24).
Certification and reliability: automotive grade (AEC-Q100), medical certification (IEC60601).
5、 Future Trends
High integration: Single chip integrated charging management, power metering, and protection functions (such as Nanxin SC9712A).
Intelligence: adaptive protection threshold, fault diagnosis (such as Jingyang Electronics BP8261H).
New material application: GaN/SiC power device driver to improve switching frequency and efficiency.
Based on the above analysis, users can choose the most suitable power protection chip model according to specific scenario requirements, combined with technical parameters and cost budget.