SI9120DY-T1-E3

SI9120DY-T1-E3 PWM Controller IC - Vishay Siliconix

The SI9120DY-T1-E3 is a high-performance isolated PWM controller from Vishay Siliconix, designed for flyback and forward converter topologies in AC/DC and DC/DC power supply applications. This versatile controller operates across a wide switching frequency range of 40kHz to 1MHz with a 50% duty cycle, making it ideal for aerospace, industrial, telecommunications, and automotive power management systems.

Key Features & Benefits

• Isolated Output Design - Provides galvanic isolation for enhanced safety and noise immunity
• Wide Switching Frequency Range - 40kHz to 1MHz operation enables flexible design optimization
• Dual Topology Support - Compatible with both flyback and forward converter designs
• Industrial Temperature Range - Operates reliably from -40°C to 85°C (TA)
• Compact 16-SOIC Package - Surface mount design (0.154", 3.90mm width) for space-efficient layouts
• RoHS Compliant - Meets environmental standards for global deployment

Applications

This PWM controller is well-suited for isolated power supply designs in industrial automation, telecommunications infrastructure, automotive electronics, and aerospace systems requiring long lifecycle availability and full traceability.

Technical Specifications

Product attributes	Property Value
Manufacturer	Vishay Siliconix
Product Series
Packaging	|
Output Isolation	Isolated
Internal Switch(s)	No
Voltage - Breakdown	-
Topology	Flyback, Forward
Voltage - Start Up	-
Voltage - Supply (Vcc/Vdd)	9.5V ~ 13.5V
Duty Cycle	50%
Frequency - Switching	40kHz ~ 1MHz
Power (Watts)	-
Fault Protection	-
Control Features	-
Operating Temperature	-40°C ~ 85°C (TA)
Grade	-
Qualification	-
Mounting Type	Surface Mount
Package / Case	16-SOIC (0.154", 3.90mm Width)
Supplier Device Package	16-SOIC
ROHS

Authorized Distributor - Full Traceability

We supply authentic Vishay Siliconix components with complete manufacturer documentation, certificates of conformance, and full supply chain traceability. All products are sourced through authorized channels and backed by long lifecycle support to protect your design investments and mitigate obsolescence risk.

Design Resources

Reference designs, application notes, and technical documentation are available to support your power supply development. Contact our design-in support team for assistance with component selection, circuit optimization, and lifecycle planning.