12V系統(tǒng)車燈浪涌防護方案設計圖：

從圖中的防護方案可以看出，電路中選用了一顆TVS二極管SM8S24A，反應速度快、殘壓低、共差模防護，滿足ISO7637-2 surge specification。SM8S24A是一種高效型的電路保護器件，常用于汽車電子產品之中。汽車級TVS二極管SM8S24A特性：
? Optimized glass passivated chip
? Case: DO-218AB
? TJ = 175 °C capability suitable for high reliability and automotive requirement
? 6600 W peak pulse power capability with a 10/1000 μs waveform, repetitive rate (duty cycle):0.01 %
? Meet ISO 7637-2 5a/5b and ISO 16750 load dump test (varied by test condition)
? AEC-Q101 qualified
? Low leakage current
? Low forward voltage drop
? Very fast response time
? RoHS compliant
? Excellent clamping capability

想了解更多有關汽車車燈浪涌防護方案及電路保護器件選型，歡迎各位前來與東沃溝通交流：136 7581 6901（微信同號）朱工