High current relay driver ic

En1 is pulled high, out1 always is turned on, and the serial input for out1 is ignored. Here we have used 12v 10amp relay in this pcb board, but you can also use 5v relays. For example, a relay with a 5v coil can be driven directly from the rectified 120 vac or 230 vac line. Meets stringent automotive module quiescent current requirements. 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. Edgefx provides a video tutorial on relay driver uln2003 circuit ic pin description and used to drive relay switch on and off. If we use a transistor that has gained about 50 times and use one transistor to increase up to 2500 times 50.

Relay drivers gate drivers are available at mouser electronics. It is basically a relay driver ic and a darlington array with high voltage and high current. A relay driver circuit is a circuit which can drive, or operate, a relay so that it can function appropriately in a circuit. Uln2003lv 7channel relay and inductive load sink driver. Relay driver circuit using uln2003 and its applications. 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. Browse digikeys inventory of high current relay 150 seriesautomotive relays. 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. For low power relays, a 2n4401 is a good choice fig 3. The hv9901 universal relay driver provides highefficiency driving for.

The ic includes two high voltage linear regulators. It is difficult to use a number of relays with transistors, so, relay driver ic uln2003a can be used for availing more relays. The tde1747 is a monolithic comparator designed for high current and high voltage applications, specifically to drive lamps, relays, stepping motors. The hv9901 universal relay driver provides high efficiency driving for lowvoltage relays with supply voltages as high as 450v. A pair of darlington is an arrangement of two bipolar transistors.

Relay driver ic uln2003 is high voltage and high current integrated ic which used darlington array. Relay driver circuit using ic uln2003 and its working edgefxkits. Its contains seven darlington pair of a transistor which have high voltage and high current carrying capability. The first one is for providing power to internal control circuitry. If driving via cmos logic, an enhancement mode mosfet is a good choice fig 5. It consists of seven open collector darlington pairs with. We can use seven relays with relay driver circuit using uln2003 and the relay driver circuit using uln2803 enables to use eight relays. 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 you desire to drive a larger relay or want less base current, a darlington driver fig 4 is recommended.

Relays have unique properties and are replaced with solid state switches that are strong than solidstate devices. The nxp mm908e624 is a highly integrated singlepackage solution that includes a highperformance hc08 mcu with a smartmos analog control ic. In this 4channel relay driver circuit we have used an optocoupler whic his triggered by active low signal, to trigger the npn transistor which further drives the relay. Relay driver circuit using ic uln2003 and its working. High voltage, high current darlington transistor driver array. The resistorr can be calculated by input voltage, input current. The max4896 8channel relay driver offers builtin inductive kickback protection, drive for latchingnonlatching or dual coil relays, and openload and shortcircuit fault detection. Drive pdcd high to disable outs pulldown current source. The unique properties are high current capacity, ability to withstand esd and drive circuit isolation. Uln2003lv 7channel relay and inductive load sink driver datasheet rev. Relay driver circuit using ic uln2003 with applications. High current relay 150 series te connectivity potter. Uln2003 relay driver ic the world of electronic parts and.