Power Integrations

TNY277GN-TL - 18.5W Offline Flyback Switcher | Power Integrations

Name: TNY277GN-TL
Brand: Power Integrations
Price: 0.75 USD
Availability: InStock

MPN: TNY277GN-TL ✓ Active

In Stock Ships in 1-3 business days

700 V Vdss User selectable Id SMD-8C (7 leads) Package 132 kHz Speed

From $0.75 USD / Unit

MOQ: 1 |

Price updated: 2026-08-21

Volume Pricing

Qty	Unit Price	Extended
1	$1.25	$1.25
10	$1.12	$11.20
100	$0.97	$97.00
500	$0.85	$425.00
1,000	$0.75	$750.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for TNY277GN-TL — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

TNY277GN

✅ Drop-In

Power Integrations

📦 SMD-8C

18.5 W · 23.5 W · 132 kHz · 700 V · Flyback · ON/OFF · SMD-8C · Surface Mount

✓ In Stock

$0.75 / Unit

View Datasheet →

TNY276GN

✅ Drop-In

📦 SMD-8C

Lower output power (15W vs 18.5W at universal input)

📋 Reference alternative (not in catalog)

TNY278GN

✅ Drop-In

📦 SMD-8C

Higher output power (21.5W vs 18.5W at universal input)

📋 Reference alternative (not in catalog)

ℹ️ 2 cross-package part(s) hidden — different package requires PCB rework and is not a true drop-in replacement. Contact us if you need cross-package suggestions.

TNY277GN-TL Maximum Ratings & Electrical Characteristics

Output Power (85-265 VAC)	18.5 W
Output Power (230 VAC)	23.5 W
Switching Frequency	132 kHz
MOSFET Breakdown Voltage	700 V
Package	SMD-8C (7 leads)
Topology	Flyback
Control Scheme	ON/OFF
Current Limit	User selectable
Operating Temperature Range	-40°C to +150°C
Input Voltage Range	85-265 VAC
Standby Power	<50 mW
Frequency Jitter	Yes
Line Undervoltage Detection	Yes (via EN/UV pin)
Overvoltage Protection	Yes
RoHS Status	Compliant

TNY277GN-TL Pin Configuration

Pin 1	EN/UV — Enable and line undervoltage sense
Pin 2	BP/M — Bypass pin for internal supply and multifunction
Pin 3	SOURCE — Source of internal MOSFET
Pin 4	DRAIN — Drain of internal MOSFET
Pin 5	SOURCE — Source of internal MOSFET
Pin 6	SOURCE — Source of internal MOSFET
Pin 7	SOURCE — Source of internal MOSFET

Safe Operating Area (SOA) & Thermal Characteristics

No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.

Typical Applications

TNY277GN-TL is suitable for 6 applications: Auxiliary Power Supplies, Standby Power for TVs and Monitors, AC-DC Adapters, Industrial Control Power Supplies, LED Lighting Power Supplies, IoT and Smart Home Devices.

🏭

Auxiliary Power Supplies

The TNY277GN-TL is ideal for auxiliary power supplies in appliances and industrial equipment, providing up to 18.5W from a universal input. Its integrated 700V MOSFET and ON/OFF control simplify the design, reducing component count and cost. The wide input range and robust protection ensure reliable operation in demanding environments.

Recommended

TNY277GN · Power Integrations

📺

Standby Power for TVs and Monitors

With low standby power (<50mW) and high efficiency, the TNY277GN-TL is perfect for standby power supplies in TVs and monitors. It meets energy efficiency standards and provides a compact solution. The frequency jitter reduces EMI, simplifying compliance testing.

Recommended

TNY277GN · Power Integrations

🔌

AC-DC Adapters

The TNY277GN-TL can be used in AC-DC adapters for consumer electronics, delivering up to 18.5W. Its integrated MOSFET and simple control scheme reduce external components, making the adapter compact and cost-effective. The device's thermal shutdown and overvoltage protection enhance reliability.

Recommended

TNY277GN · Power Integrations

🏭

Industrial Control Power Supplies

For industrial control systems, the TNY277GN-TL provides a robust power solution with wide input voltage range and comprehensive protection. Its 700V MOSFET handles high-voltage transients, and the line undervoltage detection ensures stable operation. The SMD-8C package is suitable for automated assembly in high-volume production.

Recommended

TNY277GN · Power Integrations

💡

LED Lighting Power Supplies

The TNY277GN-TL can be used in LED lighting power supplies, providing constant voltage or current with proper feedback. Its high efficiency and low standby power make it suitable for energy-efficient lighting. The integrated protections ensure long-term reliability in lighting applications.

Recommended

TNY277GN · Power Integrations

🧩

IoT and Smart Home Devices

For IoT devices and smart home hubs, the TNY277GN-TL offers a compact and efficient power solution. Its low standby power is ideal for always-on devices, and the integrated MOSFET reduces board space. The device's robust protection features ensure reliable operation in various environments.

Recommended

TNY277GN · Power Integrations

Recommended Products Summary

TNY277GN Power Integrations Used in: Auxiliary Power Supplies, Standby Power for TVs and Monitors, AC-DC Adapters, Industrial Control Power Supplies, LED Lighting Power Supplies, IoT and Smart Home Devices

What is the output power of TNY277GN-TL?

The TNY277GN-TL delivers up to 18.5 W output power from a universal input range of 85-265 VAC, and 23.5 W at 230 VAC. According to the Power Integrations TinySwitch-III datasheet, these ratings are for a flyback topology with adequate heatsinking and proper transformer design.

What is the price of TNY277GN-TL?

As of 2026-08-21, the TNY277GN-TL is priced at approximately $1.25 for single-unit quantities, dropping to $0.75 at 1000 units, based on distributor listings from DigiKey and LCSC. Prices vary by distributor and quantity, so check current stock and pricing on XAIPART for the best deal.

Where can I buy TNY277GN-TL online?

You can purchase TNY277GN-TL from major distributors such as DigiKey, Mouser, LCSC, and Xecor. XAIPART offers competitive pricing and fast shipping. Check availability and lead times on the XAIPART product page for real-time inventory.

What is the lead time for TNY277GN-TL?

The lead time for TNY277GN-TL is typically 1-2 weeks from major distributors, but it can vary based on stock levels. As of 2026-08-21, Heisener reports 192,000 pieces in stock with immediate shipment. XAIPART can provide current lead time estimates on request.

Is TNY277GN-TL in stock?

Yes, TNY277GN-TL is in stock at multiple distributors. As of 2026-08-21, LCSC has 2661 units in stock, and Heisener reports 192,000 pieces. XAIPART also maintains inventory; check the product page for live stock status.

What is the difference between TNY277GN and TNY277GN-TL?

The TNY277GN and TNY277GN-TL are functionally identical; the -TL suffix indicates tape and reel packaging for automated assembly. Both are SMD-8C packages with the same electrical specifications. Choose -TL for volume production requiring tape and reel.

Can TNY277GN-TL be used for 5V/2A USB charger applications?

Yes, the TNY277GN-TL is suitable for 5V/2A (10W) USB charger designs. With 18.5W capability at universal input, it provides ample margin. The integrated 700V MOSFET and ON/OFF control simplify the design, and the frequency jitter helps meet EMI standards.

What is the best drop-in replacement for TNY277GN-TL?

The best drop-in replacement is the TNY277GN (without -TL suffix) from Power Integrations, as it is the same die and package, differing only in packaging format. For cross-brand options, consider the NCP1077 from onsemi or the UCC28911 from Texas Instruments, but verify pin compatibility and electrical specs before substitution.

Where can I download the TNY277GN-TL datasheet PDF?

You can download the TNY277GN-TL datasheet PDF from the Power Integrations website at https://www.power.com/sites/default/files/product-docs/tinyswitch-iii_family_datasheet.pdf. It is also available on distributor sites like DigiKey and Mouser.

What is the pinout of TNY277GN-TL?

The TNY277GN-TL has 7 pins in an SMD-8C package. Pin 1 is the EN/UV (enable/undervoltage), Pin 2 is BP/M (bypass/multifunction), Pin 3 is the source of the internal MOSFET, Pin 4 is the drain of the internal MOSFET, and Pins 5-7 are also source connections. Refer to the datasheet for the exact pinout diagram.

What are the key specifications of TNY277GN-TL that engineers should know?

Engineers should know that the TNY277GN-TL is an offline flyback switcher with a 700V MOSFET, 132kHz switching frequency, and 18.5W output at universal input. It features ON/OFF control, user-selectable current limit, frequency jitter for EMI, and comprehensive protections including over-temperature and overvoltage. The SMD-8C package is suitable for compact designs.

Is TNY277GN-TL the same as TNY277PN?

No, TNY277GN-TL and TNY277PN are not the same. The TNY277GN-TL is in an SMD-8C (gull-wing) surface-mount package, while the TNY277PN is in a DIP-8 (through-hole) package. They are electrically similar but not pin-compatible due to different package footprints, so they are not drop-in replacements for each other.

What is the best Power Integrations equivalent for TNY277GN-TL?

The best Power Integrations equivalent is the TNY277GN (without -TL suffix), which is identical except for packaging format. Other TinySwitch-III family members like TNY276GN (lower power) or TNY278GN (higher power) are also pin-compatible but have different power ratings, so choose based on your power requirements.

What is the best onsemi equivalent for TNY277GN-TL?

The best onsemi equivalent is the NCP1077, which is a similar offline flyback switcher with integrated 700V MOSFET. However, it is not pin-compatible with the TNY277GN-TL, so it requires PCB layout changes. Verify electrical specifications and pinout before substituting.

Engineering reference data for TNY277GN-TL — comparison, design guidance, and compliance information.

Selection Guide

Choose the TNY277GN-TL when you need a compact, efficient offline flyback switcher with integrated 700V MOSFET and simple ON/OFF control for applications up to 18.5W. It is ideal for auxiliary power supplies, standby power, and adapters. If you need lower power, consider the TNY276GN (15W) or higher power, the TNY278GN (21.5W) - both are pin-compatible drop-in replacements. For cross-brand alternatives, the NCP1077 and UCC28911 offer similar functionality but require PCB redesign due to different packages and pinouts. The TNY277GN-TL is preferred for its proven reliability, comprehensive protection, and ease of design.

Comparison with Alternatives

Parameter	This Product	TNY277GN	TNY276GN	TNY278GN	NCP1077	UCC28911
Package	SMD-8C	SMD-8C	SMD-8C	SMD-8C	SOT-223	SOIC-7
Brand	Power Integrations	Power Integrations	Power Integrations	Power Integrations	onsemi	Texas Instruments
Output Power (85-265 VAC)	18.5 W	18.5 W	15 W	21.5 W	[DATA_NEEDED]	[DATA_NEEDED]
Switching Frequency	132 kHz	132 kHz	132 kHz	132 kHz	65/100 kHz	110 kHz
MOSFET Breakdown Voltage	700 V	700 V	700 V	700 V	700 V	700 V
Control Scheme	ON/OFF	ON/OFF	ON/OFF	ON/OFF	PWM	PWM
Pin Compatibility	Reference	Yes	Yes	Yes	No	No
Price (1pc)	$1.25	$1.25	$1.10	$1.40	$0.80	$1.00

Key Differentiators

Integrated 700V MOSFET (vs NCP1077)
ON/OFF control scheme (vs UCC28911)
Frequency jitter for EMI reduction (vs NCP1077)

Design Notes

For optimal thermal performance, ensure the SMD-8C package has adequate copper area on the PCB, especially on the source pins which are connected to the thermal pad. Use multiple vias to connect to a ground plane to dissipate heat effectively. Follow the recommended layout in the TinySwitch-III datasheet to minimize EMI and ensure stable operation.

Do not omit the BP/M pin capacitor; it is essential for internal supply decoupling and proper operation. Also, ensure the EN/UV pin is correctly connected: if line undervoltage detection is not needed, leave it unconnected to disable the function. Incorrect connection can cause false triggering or failure to start.

The TNY277GN-TL can dissipate significant power at high output loads. Ensure adequate heatsinking through PCB copper and consider the ambient temperature. The thermal shutdown protection will activate if the junction temperature exceeds the limit, so proper thermal design is essential for reliable operation.