TNY277PN - 18.5W Flyback Switcher IC | Power Integrations
부품 번호: TNY277PN ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $1.12 | $1.12 |
| 10 | $1.03 | $10.30 |
| 100 | $0.91 | $91.00 |
| 500 | $0.84 | $420.00 |
| 1,000 | $0.78 | $780.00 |
TNY277PN 개요
An offline switcher is a power-management integrated circuit that accepts rectified AC line voltage and performs high-frequency switching to provide one or more isolated DC outputs through a flyback transformer. The TinySwitch-III family is a subcategory of AC-DC converters, which sit above linear regulators and standard DC-DC converters in the power conversion hierarchy. By integrating the power MOSFET and controller on one chip, offline switcher ICs reduce BOM count, simplify PCB layout, and improve reliability compared to discrete controller-plus-MOSFET implementations.
Key features of the TNY277PN include the built-in 700 V power MOSFET, which provides wide margin for line-voltage spikes and improves surge robustness. The integrated high-voltage switched current source accelerates startup and reduces no-load input power. The user-selectable current limit lets designers optimize transformer size for the target power level, while the 132 kHz switching frequency balances transformer size against switching losses. Thermal shutdown protects the IC against secondary-side overload or fault conditions.
In operation, the IC uses a simple ON/OFF control scheme that requires no external loop compensation. The internal oscillator controls the power MOSFET duty cycle; when output feedback demands energy, the MOSFET switches, then enters a low-power state. This burst-mode operation at light load reduces standby losses and is especially useful for Energy Star-compliant adapters. The through-hole 8-pin DIP package simplifies assembly and helps transfer heat to PCB copper in moderate-power designs.
Typical applications include AC/DC adapters and battery chargers, standby and auxiliary power supplies for appliances, LED drivers, industrial control supplies, and IoT smart-home power modules. The flyback topology pairs with inexpensive transformers and standard optocoupler/TL431 feedback networks.
When designing with TNY277PN, pay attention to drain snubber selection, transformer leakage inductance, and BP/M pin decoupling. A well-laid-out PCB with tight loop areas is critical for meeting conducted EMI limits.
드롭인 대체품: TNY277PN — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: TNY277PN (동일 폼 팩터 및 풋프린트) — 차이점: Package.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
TNY276PN
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
TNY277PG
✅ 드롭인✓ 재고 있음
$0.75 / 개
데이터시트 보기 →TNY278PN
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
TNY279PN
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
TNY280PN
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
TNY277PN 최대 정격 & 전기적 특성
| 토폴로지 | Flyback |
| 스위칭 주파수 | 132 kHz |
| Built-in Power MOSFET | 700 V |
| Max Output Power (85-265 VAC) | 18.5 W |
| Max Output Power (230 VAC) | 23.5 W |
| 패키지 | 8-PDIP-C |
| 실장 유형 | Through Hole |
| Control Scheme | ON/OFF |
| 전류 제한 | User selectable |
| High-Voltage Switched Current Source | Yes |
| 열 차단 | Yes |
| Startup Circuitry | Integrated high-voltage switched current source |
TNY277PN 8-pdip-c 핀 구성 가이드
TNY277PN(8-pdip-c 패키지)의 핀 구성입니다. 이 전력 소자는 게이트, 드레인, 소스 단자를 갖추고 있습니다. 비편향 패키지의 경우 정확한 핀 1 방향과 풋프린트 세부 정보는 제조사 데이터시트를 참조하십시오. 일반적인 응용 분야로는 전원 공급 장치 설계, 모터 구동, 부하 스위칭이 있습니다.
다음에 대한 상세 핀아웃 데이터 없음: TNY277PN.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
TNY277PN 적합 용도: 6 애플리케이션s: AC/DC Adapters and Battery Chargers, Standby and Auxiliary Power Supplies, Appliance Power Supplies, LED Power Supplies and Lighting, Industrial Control Power Supplies, IoT and Smart Home Power Modules.
AC/DC Adapters and Battery Chargers
The TNY277PN is suited to 5V/2A and 12V/1.5A AC/DC adapters because its 18.5 W universal-input rating provides headroom for load transients. The integrated 700 V MOSFET reduces external component count, and the 132 kHz oscillator allows a small transformer. In typical flyback adapter designs, optocoupler feedback drives the EN/UV pin and a TL431 is used for output-voltage regulation. This IC simplifies charger production while meeting no-load loss expectations for modern adapters.
추천
Standby and Auxiliary Power Supplies
TNY277PN is well suited for standby supplies that must stay energized while the main system is off. Its ON/OFF control enables low standby consumption and the 700 V MOSFET provides robust line-surge tolerance for appliance power boards. As an auxiliary supply, it can generate a clean 12V or 5V rail from the AC line using a simple flyback stage. The built-in current limit and thermal shutdown protect the IC during fault conditions common in appliance environments.
추천
Appliance Power Supplies
For washing machines, refrigerators, and stove control boards, TNY277PN provides a cost-effective 18.5W flyback supply for control electronics, relays, and displays. The through-hole 8-PDIP-C package is easy to assemble in conventional appliance PCBs, and the 700 V integrated MOSFET withstands high-voltage AC line transients. Designers can configure the current limit to match the transformer and load. Its thermal shutdown and simple ON/OFF control reduce firmware-side power-sequencing complexity in white-goods applications.
추천
LED Power Supplies and Lighting
LED lighting panels and bulbs can use TNY277PN as the core of an isolated offline LED driver. The 18.5W universal input power supports many 15W LED modules, while the 700 V MOSFET and current-limit selection allow the transformer to be optimized for constant-voltage or constant-current output. The IC's low standby power helps meet residential lighting efficiency requirements. Its flyback topology is compatible with secondary-side constant-current feedback circuits using TL431 and current-sense resistors.
추천
Industrial Control Power Supplies
In industrial sensors, PLCs, and motor-control panels, TNY277PN supplies clean DC power for microcontrollers and communication interfaces. Its 85-265 VAC universal input makes it suitable for worldwide installations, while the 700 V MOSFET gives extra safety margin against industrial mains transients. The user-selectable current limit can be tuned to the transformer overcurrent protection. Tight load regulation is achievable through standard optocoupler/TL431 feedback, and the 132 kHz frequency keeps the magnetic components compact for DIN-rail or panel-mount form factors.
추천
IoT and Smart Home Power Modules
Smart home hubs, Wi-Fi modules, and sensor bridges need compact isolated power supplies. TNY277PN can deliver up to 18.5W universal input, enough to power a main board plus accessories. The integrated 700 V MOSFET and high-voltage current source reduce BOM size, while the low standby power helps smart devices meet energy-use requirements. The flyback converter can be designed with a small E20/E25 transformer and optocoupler feedback to create a reliable 5V rail for IoT processors, wireless transceivers, and sensors.
추천
추천 제품 요약
엔지니어링 참조 데이터: TNY277PN — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | TNY276PN | TNY277PG | TNY278PN | TNY279PN | TNY280PN |
|---|---|---|---|---|---|---|
| Brand | Power Integrations | Power Integrations | Power Integrations | Power Integrations | Power Integrations | Power Integrations |
| Package | 8-PDIP-C | 8-PDIP-C | 8-PDIP-C | 8-PDIP-C | 8-PDIP-C | 8-PDIP-C |
주요 차별점
- 18.5 W universal input rating provides margin for common 10-15 W adapter designs (vs TNY276PN)
- Balanced power class for cost-sensitive flyback supplies (vs TNY280PN)
- Verified cross-reference visibility of TNY277PG (vs TNY277PG)
설계 노트
Do not leave BP/M pin floating. Connect the recommended BP/M capacitor, typically a 0.1uF ceramic capacitor, close to the IC. This capacitor supplies gate-drive current and sets the internal supply voltage. In TinySwitch-III designs, the BP/M pin can also accept an external current-limit set resistor in some configurations, as described in the Power Integrations datasheet.
The TNY277PN uses an 8-PDIP-C through-hole package that relies on PCB copper and the lead frame for heat removal. For continuous operation near 18.5 W universal input, provide adequate copper area around drain and source leads, preferably on both top and bottom layers. Junction temperature must stay within datasheet limits; if case temperature is high, redesign the transformer or improve air flow rather than increasing copper indefinitely.
Minimize the high-frequency drain loop by placing the transformer primary, rectifier diode, and bulk capacitor close to the drain and source pins. Keep the feedback optocoupler and TL431 sense traces short. Add a Y-capacitor between primary and secondary for common-mode EMI and follow appropriate creepage and clearance distances for the AC input voltage class.
규정 준수 정보
Verified web snippets did not include explicit RoHS/REACH certification details. Refer to the Power Integrations datasheet and product page for current compliance documentation.
