A defibrillator (AED) is a portable first-aid device that delivers a high-voltage pulsed current to the heart to terminate ventricular fibrillation and restore the heart’s normal rhythm. In the emergency treatment of sudden cardiac arrest, its response speed and energy accuracy directly determine the success rate of treatment. As the core power unit of the AED, the high-voltage power module is responsible for the entire process of converting, storing and releasing energy from the low-voltage power supply to high-voltage output. Its safety design is of paramount importance. It must not only ensure the electrical safety of the patient when high-voltage energy is released, but also guarantee the stability of the module itself during frequent charge - discharge cycles, so as to avoid emergency interruption caused by device failure.
Defibrillator (AED) Block Diagram
- Battery: As a power source, it supplies power to the AED system.
- HV Capacitor Charger: It includes a flyback or push-pull circuit, which converts the electrical energy of the battery into 2KV DC (kilovolts direct current) to charge the high-voltage capacitor.
- MCU (MicroController Unit): It plays a controlling role, managing the operation of the entire system and communicates with other modules.
- Interface: It includes USB, RS232, Display (display screen), Key & Button (keys and buttons), which are used for the interaction between the device and the outside, data transmission as well as user operation control.
- Discharge to Patient - H-Bridge: When needed, the electrical energy stored in the high - voltage capacitor is released to the patient through the H - bridge circuit for defibrillation treatment. The green arrow indicates the power flow direction, and the blue arrow indicates the control signal flow direction.
Frequently Asked Questions:
Q: How do Littelfuse / IXYS high-voltage power modules ensure fast response and precise energy control in defibrillator applications?
A: Mainly in the drive design. Littelfuse also provides fast-driving ICs.
Q: What are the applications of ultra-high voltage power semiconductor devices in innovative medical equipment?
A: They are mainly used in high-voltage pulse medical equipment, such as AED, PFA devices and others.
More Littelfuse circuit protection products:
Littelfuse circuit protection products, with their excellent performance, provide stable and reliable signal transmission guarantees for medical electronic equipment.
- Fuses
- Electrical special fuses
- PTC resettable fuses
- Gas Discharge Tubes (GDT)
- Varistors, MOV
- Circuit breakers
More information about Littelfuse medical product safety design:
- Littelfuse Medical Product Safety Design: Defibrillator (AED)
- Littelfuse Medical Product Safety Design: X - ray Imaging System Power Supply System
- Littelfuse Medical Product Safety Design: Ultrasonic Scalpel System
- Littelfuse Medical Product Safety Design: Intravascular Pulsed Decalcification Instrument
- Littelfuse Medical Product Safety Design: Pulsed Field Ablation (PFA)
- Littelfuse Medical Product Safety Design: Ventilator System
- Littelfuse Medical Product Safety Design: Ultrasonic Scanning Equipment