1. 方案圖
2. 為什么DC POWER需要TVS浪涌防護
TVS 浪涌防護可以提供以下保護作用:
1. 過電壓保護:TVS 可以快速響應并抑制過電壓浪涌,將電壓限制在安全范圍內,以防止設備受到過高電壓的損壞。
2. 快速響應時間:TVS 具有極快的響應速度,可以在納秒級別內響應浪涌,從而提供即時的保護。
3. 低箝位電壓:TVS 可以將過電壓浪涌箝位到較低的電壓水平,以減少對設備的影響。
4. 高能量吸收能力:TVS 能夠吸收大量的浪涌能量,將其分散到地面,保護設備免受損壞。
5. 可靠性高:TVS 是一種可靠的浪涌保護器件,具有長壽命和穩定的性能。
通過使用 TVS 浪涌防護,直流電源可以更好地應對雷電沖擊、電源故障、感性負載開關等引起的浪涌,保護連接的設備免受損壞或故障。這有助于提高設備的可靠性、穩定性和壽命。
需要注意的是,選擇合適的 TVS 浪涌防護器件時,應根據具體的應用環境、工作電壓、浪涌能量等因素進行綜合考慮,并遵循相關的設計規范和標準。
3.DC POWER (1.8V-48V) 靜電浪涌保護ESD部分產品列表
上海雷卯電子科技有限公司,成立于2011年,品牌Leiditech,是國家高新技術企業。公司研發團隊由留美博士和TI原開發經理組建,憑借技術精湛的研發隊伍和經驗豐富的電磁兼容行業專家,主要提供防靜電TVS/ESD以及相關EMC元器件(放電管TSS/GDT、穩壓管ZENER、壓敏電阻MOV、整流二極管RECTIFIER、自恢復保險絲PPTC、場效應管MOSFET、電感)。
Leiditech圍繞EMC電磁兼容服務客戶,自建免費實驗室為客戶測試靜電ESD(30KV)、群脈沖EFT(4KV)、浪涌(8/20,10/700 10/1000)、汽車拋負載(7637 5a/5b)和元器件的性能測試等。Leiditech緊跟國內外技術更新脈搏,不斷創新EMC保護方案和相關器件,目標方向為小封裝,大功率,為國產化替代提供可信賴方案和元器件。
表格信息:
產品信息:Information of TVS
The transient Voltage Suppressor, referred to as TVS, the TVS operates by shunting excess current when the induced voltage exceeds the avalanche breakdown potential. It is a clamping device, suppressing all over voltages above its breakdown voltage. It automatically resets when the overvoltage goes away, but absorbs much more of the transient energy internally than a similarly rated crowbar device.
The selection tips of TVS
1. The Vrwm of TVS should be more than 10% working voltage and tolerance, that protect the Max DC or continuous working voltage of circuits. If the Vrwm is too low, the device will affect the normal work of the circuits because of the snow slide or reverse electric leakage. The current will be divided in the parallel circuit and the voltage will be divided in the serial circuit.
2. The VC of TVS should be less than the damaged voltage of protecting circuits.
3. The Ppp of TVS should be more than the possible peak pulse of protecting circuits.
4. The Ipp of TVS should be more than the surge current of transient circuit.
5. For the lightning protection of data interface circuit, the semiconductor ESD of low capacitance is better.
6. The selection of TVS’ polarity and encapsulation structure should based the application. For the AC circuit, the dual polarity TVS is better, and for the Multi-line protection, the ESD array of semiconductor is better.