Power Integrations has added a high-current part to its LinkSwitch-TN2Q automotive switcher IC family. The new buck switcher IC provides up to 850 mA of output current without requiring a metal heat sink, delivering a 230 percent increase in available output current compared with other parts in the LinkSwitch-TN2Q family.
(Source: Power Integrations)
The highly integrated LinkSwitch-TN2Q ICs support a wide input voltage of 30 to 550 VDC. This enables the devices to start up and operate below the required Safety Extra Low Voltage (SELV) threshold in functional safety EV applications, said PI. These devices reduce part count in automotive power supplies by integrating control, driver, and protection circuitry as well as a 750-V power mosfet.
The buck switcher ICs are AEC-Q100 qualified and support buck, buck-boost, and non-isolated flyback converter topologies. Each device incorporates a 750-V power MOSFET, oscillator, ON/off control, a high-Voltage switched current source for self-biasing, frequency jittering, fast (cycle-by-cycle) current sensing and current limit, hysteretic thermal shutdown, and output over-voltage protection circuitry in a monolithic IC.
LinkSwitch-TN2Q ICs consume very little current in standby, resulting in power supply designs that meet less than 50 mW no-load at 400 VDC input, said PI. The devices provide protection against input and output overvoltage, device over-temperature, lost regulation, and power supply output overload or short-circuit faults.
LinkSwitch-TN2Q switcher IC block diagram. Click for a larger image. (Source: Power Integrations)
Prices start at $1.33 for LNK3209GQ-TL in quantities of 10,000. A reference design kit, RDK-707Q, is available. More information is available at PI or its authorized global distributors: Digi-Key, Farnell, Mouser, and RS Components.
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