What is the Surface Mount ?

having leads that are designed to be soldered on the side of a circuit board that the body of the component is mounted on.

What is the Operating Temperature ?

The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.

What is the Packaging ?

Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.

What is the Part Status ?

Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.

What is the Terminal Form ?

Occurring at or forming the end of a series, succession, or the like; closing; concluding.

What is the Terminal Pitch ?

The center distance from one pole to the next.

What is the Max Supply Voltage ?

In general, the absolute maximum common-mode voltage is VEE-0.3V and VCC+0.3V, but for products without a protection element at the VCC side, voltages up to the absolute maximum rated supply voltage (i.e. VEE+36V) can be supplied, regardless of supply voltage.

What is the Min Supply Voltage ?

The minimum supply voltage (V min ) is explored for sequential logic circuits by statistically simulating the impact of within-die process variations and gate-dielectric soft breakdown on data retention and hold time.

What is the Nominal Supply Current ?

Nominal current is the same as the rated current. It is the current drawn by the motor while delivering rated mechanical output at its shaft.

What is the Quiescent Current ?

The quiescent current is defined as the current level in the amplifier when it is producing an output of zero.

What is the Synchronous Rectifier ?

Synchronous rectification is a technique for improving the efficiency of rectification by replacing diodes with actively controlled switches, usually power MOSFETs or power bipolar junction transistors (BJT).

What is the RoHS Status ?

RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.

LT1681ISW#TRPBF

Name: LT1681ISW#TRPBF
Brand: Linear Technology
Price: 8.71 USD
Availability: InStock
Rating: 5 (79 reviews)

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Manufacturer Linear Technology

Product Number LT1681ISW#TRPBF

Description IC SYNCHRONOUS FWRD CTRLR 20SOIC

Datasheet LT1681ISW#TRPBF Datasheet(pdf)

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$8.71

Price update：a months ago

Available in stock： 2830

Serves customers in 45 countries

1000+

Worldwide Manufacturers

$140M

$140M Growth in 5 Years

50.0M+

50M Parts Shipped in 5 Years

Linear Technology

Analog Devices (NASDAQ: ADI), a pioneer in intricate design and fabrication of advanced analog, blended-signal, and digital signal processing (DSP) integrated circuits. Since 1965, they've tackled complex signal processing challenges across global electronic domains. Merged with Maxim Integrated, they offer superior mixed-signal and power management technologies, catering to a digitally connected realm. This alliance couples vast engineering acumen and domain mastery, addressing complexities from DC to 100 GHz, spanning sensors to the cloud.

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The LT1681ISW controller simplifies the design of high power synchronous dual transistor forward DC/DC converters. The part employs fixed frequency current mode control and supports both isolated and nonisolated topologies. The IC drives external N-channel power MOSFETs and operates with input voltages up to 72V.

The LT1681’s operating frequency is programmable and can be synchronized up to 350kHz. Switch phase is also controlled during synchronized operation to accommodate multiple converter systems. Internal logic guarantees 50% maximum duty cycle operation to prevent transformer saturation.

The LT1681ISW incorporates a soft-start feature that provides a controlled increase in supplied current during start-up and after an undervoltage lockout or overvoltage/overcurrent event.

The part is available in a 20-lead wide SO package to support high voltage pin-to-pin clearance.

Feature

High Voltage: Operation Up to 72V
Synchronizable Operating Frequency and Output Switch Phase for Multiple Controller Systems
Fixed Frequency Operation to 350kHz
Adaptive and Adjustable Blanking
Synchronous Rectifier Driver
Local 1% Voltage Reference
Undervoltage Lockout Protection with Hysteresis
Input Overvoltage Protection
Programmable Start Inhibit
Transformer Primary Saturation Protection
Optocoupler Feedback Support
Soft-Start Control

Applications

Isolated Telecommunication Systems
Personal Computers and Peripherals
Lead Acid Battery Backup Systems
Automotive and Heavy Equipment

Shipping Cost

1. Shipping starts at $40, but prices may vary for certain countries like South Africa, Brazil, India, Pakistan, Israel, etc.
2. The basic freight for packages ≤0.5kg or equivalent volume is influenced by the time zone and country.

Shipping Method

1. Our products are currently shipped using DHL, SF, and UPS. For low quantities, FedEx is the chosen carrier.

Delivery Time

1. Once shipped, the estimated delivery time is contingent on the selected shipping method.

Step 1

Prepare product

Step 2

Vacuum packaging

Step 3

Anti-static bag

Step 4

Individual package

Step 5

Packaging box

Step 6

Barcode shipping label

SZC's logistic and inventory management programs bring you unmatched success.

Our strategic hubs located in Futian, Longgang, Nanshan offer a variety of customized programs designed for specific customers' needs.

We also have long-standing relationships with major logistics carriers and provide flexible solutions to meet your individual requirements.

1. Every electronic component you purchase from us comes with a 365-Day Warranty. We stand behind the quality of our products.

2. Should you receive any item that isn't in perfect condition, we are committed to arranging a refund or replacement responsibly. Please note that items must be in their original condition for these options to be available.

FAQs:

Q: How does SZComponents ensure that LT1681ISW#TRPBF is genuinely manufactured or distributed by ?
A: Our professional business development department conducts rigorous testing and verification of the qualifications of original manufacturers and agents of . All suppliers must undergo and pass our qualification review before they are allowed to list their LT1681ISW#TRPBF devices on our platform. We prioritize the sourcing channels and quality of LT1681ISW#TRPBF products above everything else, ensuring thorough supplier audits so you can make your purchase with utmost confidence.
Q: Where can I find detailed information about LT1681ISW#TRPBF chips, including original manufacturer details, DC DC Switching Controllers application, and images?
A: Utilize SZComponents's intelligent search engine, filter by the DC DC Switching Controllers category, or navigate through the 's brand page for comprehensive information.
Q: Are the prices and stock levels of 's LT1681ISW#TRPBF shown on the platform accurate?
A: Due to significant fluctuations in 's inventory, real-time updates are challenging. However, we ensure periodic updates within 24 hours. We recommend confirming your LT1681ISW#TRPBF order with a SZComponents sales representative or through our online customer service before proceeding with payment.
Q: What payment methods are accepted by SZComponents?
A: We accept various payment methods, including TT Bank, PayPal, Credit Card, Western Union, and Escrow.
Q: How are shipping arrangements made, and how can I track my package?
A: Customers can select from industry-leading freight companies like DHL, FedEx, UPS, TNT, and Registered Mail. Once your order is ready for shipment, our sales team will inform you about the shipping details and provide a tracking number. Note that tracking information might take up to 24 hours to appear. Typically, Express delivery takes 3-5 days, while Registered Mail requires 25-60 days.
Q: What is the process for returns or replacements of LT1681ISW#TRPBF?
A: We conduct a Pre-Shipment Inspection (PSI) on randomly selected batches from your order to ensure quality before shipment. We will accept returns or replacements of the LT1681ISW#TRPBF if it does not meet your expectations under the following conditions:
Issues such as incorrect quantities, delivery of wrong items, or obvious external defects are acknowledged by us.
We are informed about the defects within 90 days from the delivery date.
The LT1681ISW#TRPBF remains unused and in its original packaging.
To initiate a return, please:
Inform us within the 90-day period.
Obtain a Request for Return Authorization.
For more details, refer to our Return & Change Policy.
Q: How can I get support or request datasheets and pin diagrams for LT1681ISW#TRPBF?
A: For any After-Sales service, including datasheets and pin diagrams for LT1681ISW#TRPBF, feel free to contact us at [email protected]
Q: How can I contact SZComponents? Please provide specific contact methods.
A: Reach out to us by clicking the customer service button at the bottom right corner of our site, submitting an RFQ directly, or using the 'Contact Us' link at the top of our page to email or call us. We guarantee a response to your inquiries within 24 hours.

Product Attributes

TYPE	DESCRIPTION	Select all
Product Status	Active
Supplier Device Package	20-SO
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C
Package	Tape & Reel (TR)