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Product Detailed Parameters
- Description：TOTEM POLE CONTINUOUS CONDUCTION
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR),Cut Tape (CT)
- Mode：Continuous Conduction (CCM)
- Frequency - Switching：65kHz
- Voltage - Supply：30V
- Operating Temperature：-
- Mounting Type：Surface Mount
- Package / Case：20-LSOP (0.154", 3.90mm Width), 18 Leads
- Supplier Device Package：20-SOIC
- Current - Startup：-
- Grade：-
- Qualification：-
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Overview
The NCP1681AAD2R2G is a power factor correction controller IC designed for bridgeless totem pole PFC topologies. It operates at a fixed switching frequency of 65 kHz and supports a maximum supply voltage of 30 V. The device is housed in a 20-SOIC package and implements continuous conduction mode (CCM) control. It features digital voltage loop compensation, AC line monitoring, and phase detection capabilities.
Feature Summary
- Drives bridgeless totem pole PFC topology by eliminating input diode bridges
- Implements fixed-frequency continuous conduction mode (CCM) operation
- Provides digital voltage loop compensation and AC line phase detection
- Utilizes novel current sensing schemes without requiring Hall effect sensors
Applications
- Server power supplies
- High-performance computer power supplies
- Telecommunications power systems
- Industrial power sources
- OLED television power supplies
Procurement Notes
Verify the specific suffix 'AAD2R2G' against the manufacturer's official datasheet to confirm the fixed-frequency CCM configuration and SOIC-20 packaging details. Ensure compatibility with the intended totem pole PFC design requirements before finalizing procurement decisions.
Selection Notes
Select this component for high-power offline power supplies requiring near 99% efficiency under high-voltage input conditions. It is suitable for designs targeting strict energy efficiency standards such as 80Plus or CoC Tier 2 across wide load ranges without requiring MCU coding.
Part Context
This part belongs to the NCP1681 series, which extends totem pole PFC design advantages to the kilowatt range. It builds upon the success of lower-power variants like the NCP1680, offering a non-digital control solution that reduces design complexity and time-to-market for high-density power applications.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Verify functional equivalence with other onsemi PFC controllers if alternative sourcing is required.
