TNY277PG - 23.5W Offline Switcher IC | Power Integrations
N.º de pieza: TNY277PG ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.29 | $1,29 |
| 10 | $1.15 | $11,50 |
| 100 | $0.98 | $98,00 |
| 500 | $0.85 | $425,00 |
| 1.000 | $0.75 | $750,00 |
TNY277PG Descripción general
An off-line switcher is a power management IC that converts AC mains voltage directly to a regulated DC output, typically using a flyback or buck topology. It combines a high-voltage power switch, control logic, and protection features in a single package, simplifying the design of AC-DC power supplies. The TinySwitch-III family is part of the broader class of switched-mode power supply (SMPS) controllers, which are essential in applications ranging from chargers to industrial power supplies.
Key features of the TNY277PG include a 700 V MOSFET for wide input voltage range, a 132 kHz switching frequency for compact magnetics, and selectable current limit for design flexibility. The ON/OFF control scheme provides excellent efficiency across load conditions, and the device includes auto-restart protection for output short-circuit and open-loop faults. The 8-PDIP-C package (7 leads) is through-hole mounted, making it easy to prototype and manufacture.
Technically, the TNY277PG integrates the high-voltage power switch and control circuitry on a single die, reducing parasitic inductance and improving reliability. The high-voltage switched current source enables fast startup and low standby power, meeting energy-efficiency standards. The device also features a frequency jittering function to reduce EMI, simplifying filter design.
Typical applications include AC-DC adapters, chargers, standby power supplies, and auxiliary power supplies for appliances and industrial equipment. The wide input range and high efficiency make it suitable for global markets.
When designing with the TNY277PG, ensure proper heat sinking for the PDIP package at high output power, and follow the recommended PCB layout for the primary-side circuitry to minimize EMI and ensure stable operation.
Alternativas directas para TNY277PG — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con TNY277PG (mismo factor de forma y huella) — difiere en Package.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TNY277P
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TNY276PG
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TNY278PG
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TNY280PG
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TNY277PG Valores máximos y características eléctricas
| Output Power (230 VAC) | 23.5 W |
| Output Power (85-265 VAC) | 18 W |
| Frecuencia de conmutación | 132 kHz |
| MOSFET Breakdown Voltage | 700 V |
| Encapsulado | 8-PDIP-C (7 leads) |
| Tipo de montaje | Through Hole |
| Topología | Flyback |
| Control Scheme | ON/OFF |
| Limitación de corriente | User selectable |
| Apagado térmico | Yes |
| Auto-Restart Protection | Yes |
| Frequency Jittering | Yes |
| Rango de temperatura de funcionamiento | -40C to +150C (junction) |
| Estado RoHS | Compliant |
| Lead-Free | Yes |
Configuración de pines de TNY277PG
| Pin 1 | BP/M — Bypass pin for internal supply, also multifunction for current limit selection |
| Pin 2 | EN/UV — Enable/Undervoltage pin, used for ON/OFF control and line sensing |
| Pin 3 | DRAIN — MOSFET drain connection, connected to transformer primary |
| Pin 4 | DRAIN — MOSFET drain connection (dual pins for thermal and current handling) |
| Pin 5 | DRAIN — MOSFET drain connection (dual pins for thermal and current handling) |
| Pin 6 | DRAIN — MOSFET drain connection (dual pins for thermal and current handling) |
| Pin 7 | SOURCE — MOSFET source connection, connected to primary ground |
| Pin 8 | NC — No connection (pin removed in 7-lead package) |
Aplicaciones típicas
TNY277PG es adecuado para 6 aplicacións: AC-DC Adapters, Battery Chargers, Standby Power Supplies, Industrial Power Supplies, LED Lighting Drivers, Home Appliances.
AC-DC Adapters
The TNY277PG is ideal for AC-DC adapters up to 23.5 W, such as those used for laptops, printers, and consumer electronics. Its 700 V MOSFET and 132 kHz switching frequency enable compact transformer design, while the ON/OFF control provides high efficiency across load conditions. The wide input range (85-265 VAC) ensures global compatibility. Designers can achieve low standby power, meeting energy-efficiency regulations like Energy Star. The integrated protection features (thermal shutdown, auto-restart) enhance reliability in consumer applications.
Recomendado
Battery Chargers
For battery chargers, the TNY277PG provides a cost-effective solution with its integrated 700 V MOSFET and selectable current limit, allowing designers to tailor the output for different battery chemistries. The 132 kHz switching frequency reduces transformer size, making chargers compact and portable. The ON/OFF control ensures high efficiency during trickle charging, reducing heat dissipation. The device's auto-restart protection safeguards against output short-circuits, which is critical for charger safety. With 18 W universal input capability, it suits chargers for power tools, e-bikes, and small appliances.
Recomendado
Standby Power Supplies
The TNY277PG excels in standby power supplies for TVs, monitors, and home appliances, where low standby power is crucial. Its ON/OFF control minimizes switching losses at light loads, achieving <100 mW standby power. The integrated high-voltage MOSFET and frequency jittering reduce EMI, simplifying filter design. The 700 V rating provides ample margin for line surges. With 23.5 W capability, it can power auxiliary functions like microcontrollers and sensors. The through-hole package is easy to assemble in low-cost power boards.
Recomendado
Industrial Power Supplies
In industrial settings, the TNY277PG provides a rugged solution for auxiliary power supplies in PLCs, motor drives, and sensors. Its 700 V MOSFET handles wide input variations and transients common in industrial environments. The thermal shutdown and auto-restart protection ensure reliable operation under fault conditions. The 132 kHz switching frequency allows for small transformers, saving board space in DIN-rail modules. The through-hole package is robust for vibration-prone applications. With 18 W universal input, it can power control logic, relays, and communication interfaces.
Recomendado
LED Lighting Drivers
The TNY277PG can be used in LED lighting drivers up to 23.5 W, providing constant voltage or constant current output with minimal external components. Its high efficiency reduces heat in enclosed luminaires, extending LED life. The selectable current limit allows optimization for different LED configurations. The 700 V MOSFET is suitable for 230 VAC mains, and the frequency jittering helps meet EMI standards for lighting. The device's protection features prevent damage from LED failures. The through-hole package is suitable for retrofit LED bulbs and drivers.
Recomendado
Home Appliances
The TNY277PG is well-suited for power supplies in home appliances like washing machines, refrigerators, and air conditioners, where reliability and efficiency are paramount. Its wide input range accommodates global voltage variations, and the integrated protections handle load transients from motors and compressors. The low standby power helps appliances meet energy-efficiency standards. The 132 kHz switching frequency reduces transformer size, enabling compact power boards. The through-hole package is cost-effective for high-volume appliance manufacturing. With 23.5 W capability, it can power control boards, displays, and sensors.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TNY277PG — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TNY277PN | TNY277P | TNY276PG | TNY278PG | TNY280PG |
|---|---|---|---|---|---|---|
| Package | 8-PDIP-C (7 leads) | 8-SMD | 8-PDIP-C (7 leads) | 8-PDIP-C (7 leads) | 8-PDIP-C (7 leads) | 8-PDIP-C (7 leads) |
| Brand | Power Integrations | Power Integrations | Power Integrations | Power Integrations | Power Integrations | Power Integrations |
| Output Power (230 VAC) | 23.5 W | 23.5 W | 23.5 W | 19 W | 28 W | 36.5 W |
| Output Power (85-265 VAC) | 18 W | 18 W | 18 W | 15 W | 21.5 W | 28 W |
| Switching Frequency | 132 kHz | 132 kHz | 132 kHz | 132 kHz | 132 kHz | 132 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 | ON/OFF | ON/OFF |
| Current Limit | User selectable | User selectable | User selectable | User selectable | User selectable | User selectable |
Diferenciadores clave
- Integrated 700 V MOSFET (frente a TNY276PG)
- Higher output power than TNY276PG (frente a TNY276PG)
- Through-hole package for easy assembly (frente a TNY277PN)
Notas de diseño
The TNY277PG in an 8-PDIP-C package has a thermal resistance of approximately 80 C/W (junction-to-ambient) without a heatsink. At 23.5 W output, the power dissipation can reach 2-3 W, causing a temperature rise of 160-240C. For reliable operation, ensure adequate copper area on the PCB for heat spreading, or use a heatsink. In enclosed designs, derate the output power accordingly.
For optimal EMI performance, place the TNY277PG close to the transformer and keep the primary-side loop (input capacitor, transformer primary, MOSFET drain) as small as possible. Use a single-point ground for the source pin and the input capacitor. Add a Y-capacitor between primary and secondary grounds to reduce common-mode noise. Follow the layout guidelines in the TinySwitch-III datasheet.
Do not exceed the absolute maximum drain voltage of 700 V. Ensure the transformer's leakage inductance is minimized to avoid voltage spikes. The BP/M pin capacitor value sets the current limit; use the recommended value (typically 0.1 uF for standard, 1 uF for reduced). Incorrect capacitor values can cause false triggering or reduced output power. Also, ensure the EN/UV pin is properly connected for undervoltage lockout.
Información de cumplimiento
RoHS compliant per Power Integrations product page. Not AEC-Q100 qualified as it is not an automotive-grade part.
