DDZ9688Q-7

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	4.7V
Tolerance:	±5%
Power - Max:	500mW
Current - Reverse Leakage @ Vr:	5µA @ 3V
Voltage - Forward (Vf) (Max) @ If:	900mV @ 10mA
Operating Temperature:	-65°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	SOD-123
Supplier Device Package:	SOD-123

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Diodes - Zener - Single - DDZ9688Q-7 Application Field and Working Principle

The DDZ9688Q-7 Diode is a low voltage type of single Zener diode, which is commonly used in designing circuits that control sensitive electronic systems and provide reversed electro-motive force (EMF). It falls into the category of Zener diodes that have been specifically developed to be used in general purpose, power and lowvoltage applications.

Description

The DDZ9688Q-7, from Central Semiconductor Corp., is a single Zener diode, designed for use in several general purpose, power and low-voltage applications. It is housed in an axial-leaded through-hole package and its pin configuration is in the industry standard 2x3 TO-220AB. This configuration makes it an ideal component for circuit designs which require little power delivery and low breakdown voltages. Additionally, this component has an average forward surge current rating of 6 A, with a maximum peak forward surge current of 10 A.

Performance Characteristics

The DDZ9688Q-7 has very specific electrical characteristics which makes it suitable for various low-voltage requirements; it has a zener breakdown voltage of 6.8V, a nominal zener current of 150mA and a maximum zener impedance of 30Ω. The maximum continuous operating temperature limit of this component is 175°C and its maximum storage temperature rating is 200°C. Additionally, it has very good accuracy, a maximum thermal-resistance of 0.6°C/W and a maximum PIV rating of 8.2V.

Applications

The DDZ9688Q-7 is an ideal component for generalpurpose low-voltage applications, where low breakdown voltages are required. It has been designed for use in:

• Circuit protection
• Tuning circuits
• Voltage regulator systems
• High-voltage DC-DC converter
• Switching regulators
• Voltage spike filtering
• Power supply circuits
• Voltage protection
• Reverse polarity protection
• Over-charge protection

Working Principle

The working principle of the DDZ9688Q-7 Diode is based on the physics of conductivity. This component is comprised of a semiconductor material which acts as a barrier between the two terminals. When a voltage is applied across the two terminals, current will flow provided the voltage is of a sufficient magnitude to overcome the resistance of the semiconductor material. This process is known as Zener breakdown and occurs when the applied voltage exceeds the diode’s breakdown voltage. When this happens, the diode will become conductive and allow current to flow from one terminal to the other. The voltage of the DDZ9688Q-7 is set for 6.8V and any excess voltage greater than 6.8V will not be allowed to flow, providing protection against any excessive voltage which could damage the connected circuit. The diode’s low zener impedance ensures that the current only flows when needed and the maximum junction temperature limitation makes sure that the component will not be damaged. Furthermore, the maximum peak forward surge current of 10 A makes the DDZ9688Q-7 a good choice for current limiting applications and motor control systems.

Conclusion

The DDZ9688Q-7, from Central Semiconductor Corp., is a single Zener diode, designed for use in general purpose, power and low-voltage applications. Its maximum breakdown voltage is 6.8V, its maximum peak forward surge current is 10A and it has a maximum junction temperature limit of 175°C. It is ideal for circuit protection, voltage regulator systems, voltage spike filtering, reverse polarity protection and over-charge protection. Its working principle is based on the conductive properties of the semiconductor material, which allows current to flow when a sufficient voltage is applied.

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