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Product attributes Property Value
Manufacturer Power Integrations
Product Series
Packaging Cut Tape (CT) | Tape & Reel (TR)
Output Isolation Isolated
Internal Switch(s) Yes
Voltage - Breakdown 900V
Topology Flyback, Secondary Side SR
Voltage - Start Up -
Voltage - Supply (Vcc/Vdd) 40V ~ 650V
Duty Cycle -
Frequency - Switching 25kHz ~ 95kHz
Power (Watts) 85 W
Fault Protection Current Limiting, Over Temperature, Over Voltage, Short Circuit, UVLO
Control Features Frequency Control, Soft Start
Operating Temperature -40°C ~ 125°C (TA)
Grade Automotive
Qualification AEC-Q100
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 INN3990CQ-TL is an automotive-grade, AEC-Q100 qualified isolated flyback AC-DC switcher with secondary-side synchronous rectification and an integrated power switch. It features a 900V breakdown rating, operates from a 40V to 650V Vcc supply, and delivers 85W at a 25kHz to 95kHz switching frequency. Frequency control and soft start are included, along with current limiting, over temperature, over voltage, short circuit, and UVLO protection across a -40°C to 125°C ambient range in a 24-PowerSMD module.

  • 900V breakdown rating enables high-voltage offline and automotive designs.
  • AEC-Q100 automotive qualification for vehicle power systems.
  • Integrated switch and secondary-side SR reduce external components.
  • Comprehensive protection including over temperature, over voltage, short circuit, and UVLO.
  • -40°C to 125°C ambient range for harsh environments.

Automotive On-Board Chargers and DC-DC

The INN3990CQ-TL is AEC-Q100 qualified with a 900V breakdown rating, making it suitable for isolated flyback stages in automotive power systems. Integrated switch and secondary-side SR simplify design.

EV Auxiliary Power Supplies

Operating from a 40V to 650V Vcc supply with a -40°C to 125°C ambient range, this device supports isolated auxiliary rails in electric vehicles, with over temperature and short circuit protection.

Industrial Isolated Power

The 900V rating and 85W output suit high-voltage isolated supplies. Frequency control and soft start ease design, while UVLO and over voltage protection improve reliability.

Telecom and Data Center Bias

Galvanically isolated flyback with secondary-side SR delivers efficient bias power. Current limiting and over temperature protection safeguard operation.

Q: What topology does the INN3990CQ-TL use?
A: It is an isolated flyback switcher with secondary-side synchronous rectification.
Q: Is it automotive-grade?
A: Yes, it is AEC-Q100 qualified.
Q: Does it have an integrated switch?
A: Yes, the power switch is integrated on-chip.
Q: What is the breakdown voltage?
A: 900V drain-source rating.
Q: What power does it deliver?
A: 85W.
Q: What is the switching frequency range?
A: 25kHz to 95kHz.
Base Product Number : INN3990CQ-TL
24-PowerSMD 85W 900V AEC-Q100 Automotive Flyback Converter Integrated Switch Isolated PMIC Secondary Side SR
Q: What topology does the INN3990CQ-TL use?
A: It is an isolated flyback switcher with secondary-side synchronous rectification.
Q: Is it automotive-grade?
A: Yes, it is AEC-Q100 qualified.
Q: Does it have an integrated switch?
A: Yes, the power switch is integrated on-chip.
Q: What is the breakdown voltage?
A: 900V drain-source rating.
Q: What power does it deliver?
A: 85W.
Q: What is the switching frequency range?
A: 25kHz to 95kHz.