TOP247YN - 165W TOPSwitch-GX Off-Line Switcher | Power Integrations
料号： TOP247YN ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.1 | $31.00 |
| 100 | $2.75 | $275.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.18 | $2,180.00 |
TOP247YN 概述
Background Knowledge: An off-line switcher is an AC-DC converter IC that takes rectified mains voltage (after a bridge rectifier and bulk capacitor) and chops it at high frequency to drive an isolating transformer, producing a regulated low-voltage DC output. Off-line switchers (also called AC-DC converters or offline flyback controllers) sit in the power management IC hierarchy: off-line switcher -> AC-DC converter -> power management IC -> semiconductor. The TOPSwitch-GX family represents an early highly-integrated approach, eliminating the need for a separate MOSFET, PWM controller, and current-sense circuit.
Key features include 132 kHz / 66 kHz selectable switching frequency with frequency jitter for EMI compliance (CISPR 22 / FCC Class B / EN55022B), hysteretic thermal shutdown, remote ON/OFF control, line feed-forward with DC MAX reduction, separate LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) pins on the Y package, and half-frequency option in the Y package. Cycle-by-cycle current limit and auto-restart fault handling protect against transformer saturation and output short circuits.
Typical applications include LCD monitors, personal computers, small servers, laptop adapters, set-top boxes, digital TVs, printers, and DVD players. The wide input range (85-265 VAC) makes it suitable for global products requiring universal mains input without regional variants.
Design consideration: At universal input 85-265 VAC and full 128 W load, ensure the transformer primary inductance meets the TOPSwitch-GX design guide minimum (typically 350-500 uH for TOP247) to avoid peak current-limit triggering. Frequency-jitter EMI performance depends on adequate Y-capacitor and common-mode choke selection on the input filter.
This page synthesizes distributor pricing, drop-in alternatives, and design notes not found on any single manufacturer datasheet, optimized for engineers selecting or replacing TOPSwitch-GX devices.
直接替换替代料： TOP247YN ——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： TOP247YN （相同外形与封装尺寸） ——差异在于 Input Voltage Range, Package, Switching Frequency, Topology.
快速对比工具——选择替代料号进行并排对比：
TOP248YN
✅ 直接替换📋 参考替代料（不在目录中）
TOP246YN
✅ 直接替换📋 参考替代料（不在目录中）
TOP249YN
✅ 直接替换📋 参考替代料（不在目录中）
TOP245YN
✅ 直接替换📋 参考替代料（不在目录中）
TOP250YN
✅ 直接替换📋 参考替代料（不在目录中）
TOP247YN 最大额定值与电气特性
| 拓扑 | Flyback (Off-Line) |
| 开关频率 | 66 kHz to 132 kHz (with jitter) |
| Output Power at 85-265 VAC | 128 W |
| Output Power at 230 VAC | 165 W |
| 输入电压范围 | 85 VAC to 265 VAC (universal mains) |
| Maximum Drain Voltage | 700 V |
| On-State Drain Current | 6 A |
| 封装 | TO-220-7C (6-pin TO-220 with tab) |
| Family | TOPSwitch-GX |
| PWM Control | Integrated |
| Fault Protection | Cycle-by-cycle current limit, auto-restart, hysteretic thermal shutdown |
| Remote ON/OFF | Yes |
| Line Feed-Forward | Yes (with DC MAX reduction) |
| Half-Frequency Option | Yes (Y package) |
| EMI Compliance | CISPR 22 / FCC Class B / EN55022B with simple filter |
TOP247YN 引脚配置
| 引脚 1 | DRAIN (D) / TAB — MOSFET drain and thermal tab; connected to transformer primary |
| 引脚 2 | SOURCE (S) — MOSFET source and ground return |
| 引脚 3 | CONTROL (C) — PWM control and supply pin; bypass capacitor here |
| 引脚 4 | LINE-SENSE (L) — Input line voltage sensing for UV/OV and feed-forward |
| 引脚 5 | EXTERNAL CURRENT LIMIT (X) — External current limit adjustment |
| 引脚 6 | NC — No internal connection (per datasheet) |
典型应用
TOP247YN 适用于 6 应用s: LCD Monitor Power Supply, Laptop Adapter (90-120W), Set-Top Box Power Supply, Small Server / NAS PSU, Printer Power Supply, Digital TV Power Supply.
LCD Monitor Power Supply
The TOP247YN's 128W universal-input rating matches LCD monitor power budgets (typically 80-130W for 19-24 inch displays). Its 132 kHz switching frequency with built-in jitter keeps conducted EMI under CISPR 22B / FCC Class B limits using only a simple LC input filter, eliminating the need for a separate PWM controller + MOSFET + current-sense circuit. The Y package's separate LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) pins enable precise brown-out and overload protection. Recommended companion parts: TL431 programmable shunt reference for secondary-side voltage sensing, PC817 optocoupler for primary-secondary isolation, and an EE25 or EE30 flyback transformer with 350-500 uH primary inductance per the TOPSwitch-GX design guide.
推荐
Laptop Adapter (90-120W)
The TOP247YN is ideal for laptop adapters in the 90-120W range because 120W fits comfortably within its 128W universal-input envelope. The integrated 700V MOSFET eliminates external switching transistors, reducing BOM count and PCB area. Cycle-by-cycle current limit plus auto-restart fault protection handles transformer saturation and output short circuits reliably. The half-frequency option (66 kHz) reduces switching losses at high-line (230 VAC) operation. Recommended companion parts: TL431 for output regulation, EL817 or PC817 optocoupler, EE28 transformer core with 400 uH primary, and a 2.2 mH common-mode choke + 100 nF Y-capacitor for EMI.
推荐
Set-Top Box Power Supply
Set-top boxes (cable/satellite receivers, streaming devices) typically draw 30-80W, well within the TOP247YN's capability with substantial design margin. The integrated fault protection (over-current, over-temperature, line under-voltage) meets the reliability requirements of always-on consumer entertainment equipment. Frequency jitter minimizes AM radio band interference, important for devices located near audio equipment. Recommended companion parts: TL431 for 5V/12V regulation, PC817 optocoupler, EE25 transformer core, and a 1 mH + 2.2 mH common-mode filter for EN55022B compliance.
推荐
Small Server / NAS PSU
Small servers and NAS (Network Attached Storage) devices need reliable 100-150W AC-DC conversion with hold-up time and redundancy considerations. The TOP247YN's 165W rating at 230 VAC supports single-rail 12V/10A outputs common in server designs. Its line feed-forward maintains nearly constant power capability across the universal 85-265 VAC input range, simplifying input fuse and bulk capacitor sizing. Recommended companion parts: TL431 for 12V regulation, PC817 optocoupler, EE30 transformer for 12V/10A output, 220 uF / 400V bulk capacitor for hold-up, and dual common-mode chokes for EMI.
推荐
Printer Power Supply
Laser printers and multifunction printers require 60-130W AC-DC supplies to power logic, motors, and fuser heaters. The TOP247YN handles the full printer power budget including peak fuser warm-up transients, with its 6A peak current limit and auto-restart fault protection. Built-in thermal shutdown is essential for enclosed printer chassis with limited airflow. Recommended companion parts: TL431 for 24V/5V regulation, PC817 optocoupler, EE28 transformer, and a 1.5 mH common-mode choke for FCC Class B compliance.
推荐
Digital TV Power Supply
Digital TVs (32-65 inch LCD/LED) require 80-200W AC-DC conversion with strict standby power limits (typically <0.5W). The TOP247YN's EcoSmart features support standby power below 1W at no-load when the CONTROL pin is properly biased per the TOPSwitch-GX design guide. Frequency jitter prevents interference with TV tuner reception. Recommended companion parts: TL431 + optocoupler for primary regulation, EE28 transformer, and Y-capacitor + common-mode choke EMI filter.
推荐
推荐产品汇总
工程参考数据： TOP247YN ——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 | TOP248YN | TOP246YN | TOP249YN | TOP245YN | TOP250YN |
|---|---|---|---|---|---|---|
| Brand | Power Integrations | Power Integrations | Power Integrations | Power Integrations | Power Integrations | Power Integrations |
| Package | TO-220-7C (6-pin) | TO-220-7C - same | TO-220-7C - same | TO-220-7C - same | TO-220-7C - same | TO-220-7C - same |
| On-State Drain Current | 6 A | 8 A | 5 A | 10 A | 5 A | 11 A |
| Output Power at 230 VAC | 165 W | 250 W | 150 W | 340 W | 120 W | 380 W |
| Output Power at 85-265 VAC | 128 W | 190 W | 125 W | 250 W | 85 W | 290 W |
| Maximum Drain Voltage | 700 V | 700 V | 700 V | 700 V | 700 V | 700 V |
| Switching Frequency | 66 kHz / 132 kHz | 66 kHz / 132 kHz | 66 kHz / 132 kHz | 66 kHz / 132 kHz | 66 kHz / 132 kHz | 66 kHz / 132 kHz |
| LINE-SENSE / X Pins (Y package) | Yes (separate pins) | Yes | Yes | Yes | Yes | Yes |
| Half-Frequency Option | Yes | Yes | Yes | Yes | Yes | Yes |
关键差异点
- Integrated 700V MOSFET eliminates external switching transistor （对比 MC34167TVG)
- Separate LINE-SENSE and EXTERNAL CURRENT LIMIT pins on Y package （对比 TOP247YN (R-package equivalent TOP247R))
- Built-in frequency jitter for CISPR 22B EMI compliance （对比 Discrete PWM controller + MOSFET design)
设计说明
The TOP247YN in TO-220-7C has theta_JA around 35-40 C/W when the tab is soldered to 1 sq inch of 2-oz copper. At 128W output from universal 85-265 VAC input, internal dissipation is approximately 2-4W, giving a junction temperature rise of 70-160C above ambient. For enclosed chassis with limited airflow (printer, monitor), verify junction temperature stays below 110C derating. If higher power or smaller PCB area is required, migrate to TOP248YN (same pinout, lower thermal stress).
Place the TOP247YN's CONTROL pin bypass capacitor (typically 47 uF) as close to pin 3 as possible, with short trace to SOURCE (pin 2). Keep the DRAIN tab copper area as large as practical for heat dissipation. The LINE-SENSE (pin 4) high-voltage resistor divider must use 1% or better resistors and keep creepage distance to DRAIN tab per IPC-2221. Add a Y-capacitor (1-4.7 nF, Y1/X1 rated) from secondary ground to primary DRAIN tab for EMI.
Do not exceed the 700V drain-to-source breakdown - ensure the reflected output voltage plus leakage spike stays below 650V with adequate snubber (RC or RCD) on the primary. Do not omit the LINE-SENSE pin resistor divider - it provides UV/OV protection critical for universal input. Do not use electrolytic capacitors with insufficient ripple current rating on the bulk capacitor - 220-470 uF / 400V with 105C rating is typical. Verify transformer primary inductance is 350-500 uH (per TOPSwitch-GX design guide) to prevent peak current triggering.
合规信息
RoHS and REACH compliant per Power Integrations product page. Not AEC-Q100 qualified - this is an AC-DC power IC, not an automotive-grade part. Lead-free and halogen-free per modern Power Integrations manufacturing standards.
