The Problem :

Ever connected a battery the wrong way and watched your circuit burn? That’s reverse polarity damage—and it’s more common than you think. Many integrated circuits (ICs) are sensitive and can fail instantly if the power supply is reversed.

The Solution :

Instead of relying on basic diodes that cause voltage drops, use smart ICs or P-channel MOSFETs designed for reverse polarity protection. These solutions minimize voltage loss and increase efficiency—perfect for battery-powered devices.

Practical Example :

Say you’re building an Arduino-based sensor node. A wrongly connected Li-ion cell could destroy the microcontroller. Adding a reverse protection IC like the LM74610 or using a P-MOSFET in reverse-blocking mode can prevent this.

Sample Calculation :

If your device runs on 5V and draws 1A:

• A Schottky diode drops ~0.4V → Power loss = 0.4V × 1A = 0.4W

• A reverse protection IC or MOSFET drops ~0.05V → Power loss = 0.05V × 1A = 0.05W
  That’s 8x more efficient!

Product Recommendation :

Explore MOSFETs and flux made in India to add robust protection to your designs:

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