Application background of Socay's DC12V power supply protection scheme:
1. Global warming, increasing thunderstorms
2. After the power supply is damaged by lightning strikes, the danger is high
3. High maintenance costs after power lightning damage
4. High surge power supply has become an industry trend
Application of Socay DC12V power supply protection scheme:
1. Ball machine power supply
2. Shooting power supply
3. Power adapter
4. LED power supply
5. Home audio player
6. Digital photo frame power supply
7. Vehicle power supply
8. Other DC12V power supply
Precautions for Socay's DC12V power supply protection scheme:
1. This scheme adopts TVS transient suppression diodes with fast reaction time and low residual voltage in the later stage
2. The front stage adopts a three pole GDT ceramic gas discharge tube with large flow rate and small volume
3. Use inductor L as decoupling in the middle to drive the GDT ceramic gas discharge tube to discharge and amplify the current
4. This power supply scheme meets surge testing standards such as IEC61000-4-5 and GB/T17626.5
5. This power solution can pass the 1.2/50uS combined wave surge test
Circuit diagram of Socay's DC12V power supply protection scheme:
Socay's DC12V power supply protection scheme protection device selection parameter description:
Selection parameters of ceramic gas discharge tubes:
| category | model | direct nominal voltage(V) | Impulse current(8/20uS) | Cp | resistance |
| GDT | SC3E5-90LSMD | 90±20% | 5KA | ＜1.5pF | ＞1G |
| GDT | SC3E6-90MM | 90±20% | 10KA | ＜1.5pF | ＞1G |
TVS transient suppression diode selection parameters:
| model | Vbr(V) | Ir | Vrwm | Ipp | Vc(v) | package |
| SMBJ15CA | 16.7-18.5 | 5uA | 15.0V | 24.59A | 24.4 | SMB/DO-241AA |
The above is the DC12V power protection scheme recommended by socay. For more product details, please consult online customer service or follow the WeChat official account "hnstshop". Huanian Mall provides one-stop procurement and FAE technical support. Welcome to inquire.
