Solution for DC24V to DC12V 150W power module for new - energy batteries
1. Project Background and Requirements Analysis
With the rapid development of new energy vehicles, energy storage systems, and industrial equipment, there is a growing demand for efficient and reliable vehicle-mounted systems./The demand for battery-powered equipment is growing daily. This solution aims to design a system suitable for new energy battery systems (such as lithium-ion battery packs).DC24VchangeDC12V 150WIsolated power module converterIt is mainly used to power in-vehicle audio-visual systems, auxiliary equipment, control units or low-voltage loads.
Core requirements:
Input voltage range:18V-36V(cover24VBattery system fluctuations)
Output voltage:12V ±2%
Output power:200W
efficiency:≥86%(Fully loaded)
Protection functions: Overvoltage, overcurrent, short circuit, and overtemperature protection.
Operating temperature:-25℃to+85℃(Industrial grade)
Size and Heat Dissipation: Compact design, natural cooling or built-in heatsink power.
2. Technical solution design
2.1 Topology selection
useSynchronous buck (Buck) converter：
Suitable for high step-down ratios (24V→12V）
High efficiency, reducing switching losses
Supports high current output (200W/12V ≈ 16.7A）
2.2 Key parameter design
Switching frequency：200kHz(Balancing efficiency and volume)
Inductor selection：10μHIron-silicon-aluminum magnetic ring inductor (saturation current)≥25A）
Output capacitor：470μFsolid capacitors×2(LowESRSatisfying ripple<100mV）
Input filtering：pType-A filter (suppresses electromagnetic interference on the battery side)
3. Protection and safety design
3.1Multiple protection mechanisms
Input undervoltage/Overvoltage lockout
Output current limiting protection
Short circuit protection
Over-temperature protection
3.2 New energy battery compatibility characteristics
Reverse connection protection
Surge Suppression
Isolation design
Supports constant voltage and constant current charging
