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Product attributes Property Value
Manufacturer Power Integrations
Product Series InnoSwitch™3-AQ
Packaging Tape & Reel (TR) |
Output Isolation Isolated
Internal Switch(s) Yes
Voltage - Breakdown 1700V
Topology Flyback, Secondary Side SR
Voltage - Start Up 30 V
Voltage - Supply (Vcc/Vdd) 30V ~ 1200V
Duty Cycle -
Frequency - Switching 25kHz ~ 95kHz
Power (Watts) 50 W
Fault Protection Current Limiting, Over Temperature, Over Voltage
Control Features Soft Start
Operating Temperature -40°C ~ 125°C (TA)
Grade Automotive
Qualification AEC-Q101
Mounting Type Surface Mount
Package / Case 24-PowerSMD Module (0.425", 10.80mm Width), 17 Leads
Supplier Device Package InSOP-24D
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Power Integrations INN3947CQ-MR is an automotive-grade, isolated flyback converter with secondary-side synchronous rectification and an integrated switch. Rated at 1700V breakdown voltage and up to 50 W output, it operates from a 30V to 1200V Vcc supply with a 30 V start-up threshold and 25kHz to 95kHz switching frequency. Current limiting, over temperature, and over voltage protection plus soft start ensure reliability across -40°C to 125°C.

  • 1700V breakdown voltage enables direct high-voltage DC bus operation.
  • Integrated switch and secondary-side SR reduce external components and simplify design.
  • Wide 30V to 1200V Vcc supply range supports diverse input voltages.
  • Current limiting, over temperature, and over voltage protection with soft start enhance reliability.
  • AEC-Q101 automotive qualification and -40°C to 125°C range suit demanding environments.

Automotive Auxiliary Power Supplies

With AEC-Q101 qualification, 1700V breakdown, and -40°C to 125°C operation, this flyback converter suits isolated auxiliary supplies on high-voltage DC buses in electric vehicles.

Industrial Motor Drive Bias Rails

The 30V to 1200V Vcc supply range and 50 W output enable isolated housekeeping supplies in inverters and motor drives.

Renewable Energy Inverter Auxiliaries

The 25kHz to 95kHz switching frequency range and integrated switch support compact isolated auxiliary power in solar and storage systems.

High-Voltage Isolated Conversion

Secondary-side SR and integrated switch simplify isolated flyback design while built-in protections ensure robust operation.

Q: What is the topology of the INN3947CQ-MR?
A: It is an isolated flyback converter with secondary-side synchronous rectification (SR).
Q: What is the breakdown voltage rating?
A: It features a 1700V breakdown voltage (Vds rating).
Q: Does it have an integrated switch?
A: Yes, the power switch is integrated on-chip.
Q: What output power does it support?
A: Up to 50 W output power.
Q: Is it automotive qualified?
A: Yes, it is automotive-grade and AEC-Q101 qualified.
Base Product Number : INN3947CQ-MR
1700V Breakdown 50W AC-DC Converter AEC-Q101 Automotive Flyback Converter Isolated Offline Switcher PowerSMD Module Secondary Side SR
Q: What is the topology of the INN3947CQ-MR?
A: It is an isolated flyback converter with secondary-side synchronous rectification (SR).
Q: What is the breakdown voltage rating?
A: It features a 1700V breakdown voltage (Vds rating).
Q: Does it have an integrated switch?
A: Yes, the power switch is integrated on-chip.
Q: What output power does it support?
A: Up to 50 W output power.
Q: Is it automotive qualified?
A: Yes, it is automotive-grade and AEC-Q101 qualified.