T2117-TAQY Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip T2117-TAQY is a zero-voltage switch IC with adjustable ramp control for AC line power switching in an SO-8 package. It enables soft-start and phase-control functions with externally programmable ramp timing, minimizing inrush current and EMI. Available in small outline 8-pin format for compact power control board designs.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- T2117-TAQY Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Zero-voltage switching reduces EMI and inrush current compared to hard-switching AC control circuits
- Externally adjustable ramp timing via single resistor-capacitor network for flexible soft-start configuration
- SO-8 package with 8 pins enables compact layout in space-constrained AC power control modules
Applications
The T2117-TAQY is designed for AC mains power control circuits requiring zero-voltage switching to reduce electromagnetic interference and component stress. It is ideal for soft-start lamp dimmers, heating element controllers, and phase-control motor speed regulators operating from 50 Hz or 60 Hz AC lines. Its adjustable ramp feature allows engineers to tune inrush current profiles without changing PCB layout, simplifying compliance with EMC standards.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the T2117-TAQY achieve zero-voltage switching and why does it matter for EMI compliance?
The T2117-TAQY triggers triac or SCR gate pulses only at the zero-crossing point of the AC sine wave, eliminating abrupt current steps. This reduces conducted and radiated EMI by more than 20 dB compared to random-phase firing, making it easier to pass IEC 61000 limits in 50 Hz or 60 Hz mains-connected equipment.
What external components set the ramp timing on the T2117-TAQY, and what timing range is achievable?
The T2117-TAQY uses an external RC network connected to its ramp pin to define the soft-start duration. By selecting resistor values from a few kilohms to several hundred kilohms paired with a capacitor of 10 nF to 1 µF, designers can set ramp durations from a few AC cycles up to several seconds, covering most inrush control requirements.
Which load types are well-suited for control by the T2117-TAQY in heating and lighting applications?
The T2117-TAQY is compatible with resistive and mildly inductive loads including incandescent lamps, halogen lights, and resistive heating elements powered from 100 V to 240 V AC mains. Its adjustable ramp limits peak inrush current during cold filament or cold-heater turn-on, extending load lifetime by reducing thermal shock.
How does the SO-8 package of the T2117-TAQY compare to larger PDIP packages in board space savings?
The SO-8 package of the T2117-TAQY occupies approximately 19 mm² of PCB footprint versus about 69 mm² for an 8-pin PDIP, saving roughly 70% board area. This compact footprint is well-suited for embedded AC power controllers where multiple control channels must share limited PCB real estate in a single form-factor enclosure.
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