![]() It is a single-channel integrated eFuse with a wide input voltage range of 2.7V to 29V, supporting up to 5A output current and a low 25mΩ (typical) Rds(on). Semtech recently released an eFuse product, HotSwitch HS2950P. ![]() An eFuse can replace a fragile conventional fuse and integrate all the protection features into one product. Due to all these protection features, the load switch is also called an electronic fuse or eFuse. It also protects the load from a power supply in abnormal power situations such as inrush current and electrical transients.Īlong with inrush current control, a load switch protects the electrical circuit from overvoltage, undervoltage, over-temperature, short-to-the-battery, and short-to-ground conditions. Turning the load on and off and power sequencing are not the only functions carried out by a load switch. This ordering called power sequencing is done by load switches. To ensure turn on and turn off happens appropriately, a specific order needs to follow in distributing power in the circuit. Multiple power sources are used in some applications, such as microprocessors, FPGAs, network switches, or industrial controllers. A load switch can automatically turn off and turn on a load as needed, significantly reducing overall power consumption. These circuits can consume power even in sleep mode. For an electronic gadget, not all circuitry needs to be active all the time. But in recent years, power saving has become crucial for any electronic device, whether it is battery-powered or not. For a portable battery-powered device, saving power means longer battery life. Being power efficient means consuming power only when needed by the system. Modern-day power electronic devices are designed to be smaller, more innovative and more efficient. System protection with a HotSwitch device Figure 1 shows how a system is protected by a HotSwitch device.įigure 1. At the same time, the devices in Semtech’s HotSwitch portfolio provide an enhanced shield against inrush current, overvoltage, under voltage, reverse current, short circuit, and over-temperature faults. It detects electrical surges and secures the downstream subsystem by disconnecting the load from the power source. Primarily, the HotSwitch device turns on or off the current flow to a power rail as-needed. Ensure you and your passengers stay warm and your windshield is properly defrosted.HotSwitch® is a new product line of devices from Semtech with an integrated load switch or eFuse that protects electronics systems against typical electrical transients and steady-state fault conditions. Other things can cause your heat to stop working – your qualified technician will be able to diagnose the problem. If you notice any of these symptoms, you should have your vehicle checked out at your NAPA AutoCare Center. If it’s cracked, you may see coolant leaking under the dash or smell an odd, sweet odor. Another sign your coolant vacuum valve switch isn’t working is engine overheating. Sometimes the coolant vacuum valve switch can crack, be jammed up with dirt or debris, or even be clogged up with old coolant. If the coolant vacuum valve switch isn’t working, you don’t get warm air to either. That should send hot coolant to the heater core which heats your cabin air or defroster air. (The heater core is like a small radiator that exchanges heat between the coolant and your cabin air.) When you turn on the switch for heat or defrost, it signals the coolant vacuum valve switch to open. When you don’t need heat in your vehicle, you don’t need hot coolant from your radiator to go through the heater core in your vehicle. It’s called the coolant vacuum valve switch or thermostat vacuum switch. The problem could be a part of the heating system that not that many people understand. When you switch on the heat, you may find the air that comes out of the venisn’t hot. ![]() When the weather gets cooler, you want the cabin of your vehicle to stay warm.
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