TNY277PG - 23.5W Offline Switcher IC | Power Integrations
料号： TNY277PG ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 概述
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.
直接替换替代料： TNY277PG ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TNY277PG （相同外形与封装尺寸） ——差异在于 Package.
快速对比工具——选择替代料号进行并排对比：
TNY277P
✅ 直接替换📋 参考替代料（不在目录中）
TNY276PG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TNY278PG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TNY280PG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TNY277PG 最大额定值与电气特性
| Output Power (230 VAC) | 23.5 W |
| Output Power (85-265 VAC) | 18 W |
| 开关频率 | 132 kHz |
| MOSFET Breakdown Voltage | 700 V |
| 封装 | 8-PDIP-C (7 leads) |
| 安装类型 | Through Hole |
| 拓扑 | Flyback |
| Control Scheme | ON/OFF |
| 限流 | User selectable |
| 热关断 | Yes |
| Auto-Restart Protection | Yes |
| Frequency Jittering | Yes |
| 工作温度范围 | -40C to +150C (junction) |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
TNY277PG 引脚配置
| 引脚 1 | BP/M — Bypass pin for internal supply, also multifunction for current limit selection |
| 引脚 2 | EN/UV — Enable/Undervoltage pin, used for ON/OFF control and line sensing |
| 引脚 3 | DRAIN — MOSFET drain connection, connected to transformer primary |
| 引脚 4 | DRAIN — MOSFET drain connection (dual pins for thermal and current handling) |
| 引脚 5 | DRAIN — MOSFET drain connection (dual pins for thermal and current handling) |
| 引脚 6 | DRAIN — MOSFET drain connection (dual pins for thermal and current handling) |
| 引脚 7 | SOURCE — MOSFET source connection, connected to primary ground |
| 引脚 8 | NC — No connection (pin removed in 7-lead package) |
典型应用
TNY277PG 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： TNY277PG ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Integrated 700 V MOSFET （对比 TNY276PG)
- Higher output power than TNY276PG （对比 TNY276PG)
- Through-hole package for easy assembly （对比 TNY277PN)
设计说明
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.
合规信息
RoHS compliant per Power Integrations product page. Not AEC-Q100 qualified as it is not an automotive-grade part.
