CDBM140LR-G

The CDBM140LR-G is a highly efficient and precise rectifier diode specifically designed for automotive electronics. It is a single, surface mounted diode that features a wide temperature operating range, low reverse leakage current and superior reverse voltage capabilities, making it an ideal choice for applications including low-side switch signature detection, motor drive circuits, motor over-current protection, power factor correction and other automotive electronics. Through its advanced design, the CDBM140LR-G ensures precise and reliable operations with minimal switching loss and high performance.

Design and Construction

The CDBM140LR-G is constructed with a 200 mil body and a 4 mm package. It has a typical forward voltage drop of 0.7V and a total thermal resistance junction to ambient (Rjc) of 0.73K/W. The diode is also equipped with an integrated lead frame to minimize inductance and EMI radiation, helping to minimize interference with other components in the system. The device also has an output capacitance of 1.1nF, allowing for a stable switching frequency. In order to further reduce system noise, the CDBM140LR-G is equipped with spread spectrum clocking (SSC) and spread spectrum voltage regulation (SVR).

Applications

The CDBM140LR-G is suitable for numerous automotive applications, including low-side switch signature detection, motor drive circuits, motor over-current protection, power factor correction and other automotive electronics. Due to its extremely low on-resistance, the CDBM140LR-G can be used to reduce system power dissipation and minimize energy losses. The device is particularly well-suited for use in motor drive circuits, where its high surge capability and ability to regulate current efficiently allows it to better protect motors from excessive current. Furthermore, its high forward voltage drop ensures minimal energy loss when switching is frequently needed. Additionally, the CDBM140LR-G is highly reliable, featuring fail mode-free operation and a wide temperature operating range.

Working Principle

The CDBM140LR-G operates by allowing current to flow in one direction, while blocking its flow in the opposite direction. This occurs when a voltage of the same polarity as the diode is applied across its terminals. Current then flows from the anode to the cathode and this flow is limited by the diode’s internal resistance. The CDBM140LR-G also limits the reverse current by creating a junction barrier between its two terminals. When a voltage of the opposite polarity is applied to the device’s terminals, current is blocked, preventing further current flow. The CDBM140LR-G also features a fail mode circuit to ensure switching safety. This ensures that should a failure occur, the diode will remain in a non-conductive state, preventing any further current flow from occurring.

Conclusion

The CDBM140LR-G is an ideal choice for use in numerous automotive applications due to its high efficiency and reliability. Its advanced design and construction ensures low power loss and minimal interference, allowing for improved performance. The device’s integrated spreadspectrum clocking and voltage regulation also enables it to better protect motors and system components from excessive current and interference. Finally, its fail mode circuit prevents any further current flow should a diode failure occur.