LDA111S IXYS SEMICONDUCTOR Integrated Circuit (Small Outline Packages) In Stock
IXYS LDA111S is a single-channel Darlington output optocoupler in a small outline package, providing high current transfer ratio and galvanic isolation between input and output circuits. Suitable for motor control, PLC interfaces, and signal isolation up to 5000 V.
- Manufacturer
- IXYS SEMICONDUCTOR
- Package
- Small Outline Packages
- Pin Count
- 6
- Lifecycle
- ACTIVE
- Datasheet
- LDA111S Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Darlington transistor output delivers high current transfer ratio (CTR) exceeding 300% for driving higher-load circuits
- Single-channel small outline package (SOP) enables compact PCB footprint with standard pick-and-place assembly
- Galvanic isolation between LED input and transistor output provides noise immunity and protects sensitive logic from high-voltage transients
Applications
The LDA111S is used in industrial automation equipment such as PLCs, motor drives, and relay-replacement circuits where high current gain and isolation are required. Its Darlington output stage allows it to drive loads directly without additional buffer transistors, simplifying design in power supply feedback, gate-drive isolation, and TRIAC trigger circuits. The small outline package makes it suitable for space-constrained control boards in HVAC systems, smart meters, and robotics.
Specifications
| Optoelectronic Device Type | DARLINGTON OUTPUT OPTOCOUPLER |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8541.40.80.00 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output configuration does the LDA111S use and how does it affect drive capability?
The LDA111S uses a Darlington transistor output stage, which provides a current transfer ratio (CTR) exceeding 300% at 1 mA input current. This high gain allows the device to directly drive loads up to 150 mA without external buffer transistors, simplifying circuit design.
What isolation voltage does the LDA111S provide and what standards does it meet for industrial safety?
The LDA111S provides galvanic isolation of up to 5000 V RMS between the LED input and the Darlington output. This meets IEC 60747-5-5 reinforced insulation requirements for industrial equipment operating in 300 V AC environments, making it suitable for motor drives and power converters.
How does the LDA111S compare with a single-transistor optocoupler such as the 4N35 in high-gain applications?
Unlike the standard single-transistor 4N35 with CTR around 100% at 10 mA, the LDA111S Darlington configuration achieves CTR above 300% at just 1 mA input, reducing LED drive power by up to 10 times. The trade-off is a slower switching speed of approximately 50 µs versus 5 µs for the 4N35, making LDA111S better suited for DC switching than high-speed logic.
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About IXYS SEMICONDUCTOR
IXYS SEMICONDUCTOR is a leading electronic component manufacturer. FindMyChip sources IXYS SEMICONDUCTOR ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
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