Power Integrations LinkSwitch™-TN2Q (LNK3209GQ)

A new high-current member of the LinkSwitch-TN2Q family of automotive switcher ICs. The 850-mA rating for this IC represents an increase of 230% in available output current compared with other members of the LinkSwitch-TN2Q family.
The highly integrated ICs support a very wide input voltage of 30 to 550 VDC, enabling the devices to start-up and operate below the required Safety Extra Low Voltage (SELV) threshold in functional safety EV applications.

LinkSwitch-TN2Q ICs reduce part-count by including control, driver, protection circuitry and a 750 V rated power MOSFET in an SMD package to enable more sophisticated electronics designed into cars.

Key features

• Supports buck, buck-boost and flyback topologies with wide input voltage of 30 to 550 VDC
• Excellent load and line regulation at 66 kHz operation with accurate current limit
• 750 V MOSFET rating for excellent surge withstand and less than 50 mW no-load consumption
• AEC-Q100 qualified

Additional features

• AEC-Q100 qualified
• 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
• Consumes very little current in standby, resulting in power supply designs that easily meet less than 50 mW no-load at 400 VDC input
• Comprehensive protection features enable safe and reliable power supplies, including protection against input and output overvoltage, device over-temperature, lost regulation, and power supply output overload or short-circuit faults

Applications

• Auxiliary power supplies for automotive such as HVAC
• Climate control
• Onboard charger
• Emergency power supply for traction inverter

Available tools 

PI Expert™ – Our powerful browser-based design tool automatically updates to support the latest products, including InnoSwitch3-AQ ICs. PI Expert turns your specifications into a ready-to-build design within minutes

RDK-707Q Reference Design Kit:  9.75 W Non-Isolated Buck Power Supply using Automotive-Qualified LinkSwitch-TN2Q