Under Voltage and Over Voltage monitoring

  The TPS3702 family of devices combines two comparators and a precision reference for overvoltage and undervoltage detection. The TPS3702 features a wide supply voltage range (2 V to 18 V) and highly accurate window threshold voltages (0.9% over temperature). The TPS3702 is designed for systems that require an active low signal if the voltage from the monitored power supply exits the accuracy band. The outputs can be pulled up to 18 V and can sink up to 10 mA. Unlike many other window comparators, the TPS3702 includes the resistors used to… Read More

Types of Relays

An electrical relay is a switch that is used for controlling circuits. Today you’ll learn about different types of electrical relays. Electromagnetic attraction type The magnetic force produced by undesired current attracts the armature of the relay. Electromagnetic attraction type relays can operate on either a.c or d.c quantities. They are further divided into three types: Attracted armature type Solenoid type Balance beam type Induction type relay The working of Induction type relays relies on the electromagnetic induction phenomenon. They are only used for a.c quantities. They are further classified into two… Read More

MAX44211 Output Protection

Unwanted transients emanating from the power line back to the line-driver’s output and back-EMF generated by the coupling circuit when the load is disconnected and connected, and vice versa, create undesirable over-voltage conditions. Back-EMF is also generated when the line driver outputs are toggled from high to low impedance state, if significant current was flowing at the disconnect time. The MAX44211 power line communications driver most often is placed facing the power line with an isolating stage between them. In case of such over-stress conditions, external protection is required to protect the… Read More

High-Speed Over-current Detection

This high-speed, low-side over-current detection solution is implemented with a single zero-drift fast-settling amplifier (OPA388) and one high-speed comparator (TLV3201). This circuit is designed for applications that monitor fast current signals and over-current events, such as current detection in motors and power supply units. The OPA388 is selected for its widest bandwidth with ultra-low offset and fast slew rate. These parameters allow the circuit to be a well-balanced, high-speed solution in order to accurately detect high frequency current components. In applications that only require average current detection, devices with less bandwidth can… Read More