High current relay driver ic

Relay driver circuit using ic uln2003 and its working. Edgefx provides a video tutorial on relay driver uln2003 circuit ic pin description and used to drive relay switch on and off. Able to report errors and is capable of daisy chain connections. High voltage, high current darlington transistor driver array. Drive pdcd high to disable outs pulldown current source. If driving via cmos logic, an enhancement mode mosfet is a good choice fig 5.

The first one is for providing power to internal control circuitry. Relay driver circuit using ic uln2003 with applications. For example, a relay with a 5v coil can be driven directly from the rectified 120 vac or 230 vac line. Relay driver ic uln2003 is high voltage and high current integrated ic which used darlington array. The max4896 8channel relay driver offers builtin inductive kickback protection, drive for latchingnonlatching or dual coil relays, and openload and shortcircuit fault detection. The uln2003lv sink supports a wide range of 3vto5v relay and driver features 7 low output impedance drivers to inductive coils support low voltage relay and inductive coil. The hv9901 universal relay driver provides highefficiency driving for. Relays have unique properties and are replaced with solid state switches that are strong than solidstate devices. For low power relays, a 2n4401 is a good choice fig 3. Uln2003 is a very famous relay driver integrated circuit. Relay driver circuit using ic uln2003 and its working edgefxkits.

It is difficult to use a number of relays with transistors, so, relay driver ic uln2003a can be used for availing more relays. We can use seven relays with relay driver circuit using uln2003 and the relay driver circuit using uln2803 enables to use eight relays. The tde1747 is a monolithic comparator designed for high current and high voltage applications, specifically to drive lamps, relays, stepping motors. En1 is pulled high, out1 always is turned on, and the serial input for out1 is ignored. Uln2003 relay driver ic the world of electronic parts and. Thus, if very low current about 100 ua, the relay driver circuit can provide current up to 250 ma therefore, the current coil of 250 ma. Features, specifications, alternative product, product training modules, and datasheets are all available. The ic includes two high voltage linear regulators. The unique properties are high current capacity, ability to withstand esd and drive circuit isolation. If you desire to drive a larger relay or want less base current, a darlington driver fig 4 is recommended.

The hv9901 universal relay driver provides high efficiency driving for lowvoltage relays with supply voltages as high as 450v. The resistorr can be calculated by input voltage, input current. Meets stringent automotive module quiescent current requirements. Relay drivers gate drivers are available at mouser electronics. The nxp mm908e624 is a highly integrated singlepackage solution that includes a highperformance hc08 mcu with a smartmos analog control ic. Relay driver circuit using uln2003 and its applications. Uln2003lv 7channel relay and inductive load sink driver datasheet rev. A relay driver circuit is a circuit which can drive, or operate, a relay so that it can function appropriately in a circuit. The driven relay can then operate as a switch in the circuit which can open or close, according to the needs of the circuit and its operation. The relay driver uln2003 ic is a high voltage and current darlington array ic, it comprises of 7open collector darlington pairs with common emitters. If we use a transistor that has gained about 50 times and use one transistor to increase up to 2500 times 50. Here we have used 12v 10amp relay in this pcb board, but you can also use 5v relays.