UCC28600D - 8-Pin Quasi-Resonant Flyback Green-Mode Controller | TI
料号： UCC28600D ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.95 | $1.95 |
| 10 | $1.71 | $17.10 |
| 100 | $1.42 | $142.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $0.98 | $980.00 |
UCC28600D 概述
What is a quasi-resonant flyback controller? A quasi-resonant flyback controller is a type of AC-DC PWM (pulse-width modulation) controller that switches the MOSFET at the valley of the drain-voltage waveform instead of at a fixed frequency. This valley-switching technique minimizes switching losses, reduces EMI, and improves energy-efficiency at light loads, making it a key building block of modern green-mode switch-mode power supplies (SMPS).
Key features include built-in advanced energy-saving features, frequency fold-back and green-mode operation that reduces switching losses and standby power consumption, integrated high level protection features, and a wide VDD operating range. The controller integrates high-level protection features and supports quasi-resonant operation to meet stringent world-wide energy efficiency requirements.
Technically, the UCC28600 incorporates frequency fold-back and green-mode operation to reduce switching losses and improve light-load efficiency. Its quasi-resonant detection circuit senses the transformer's drain voltage and triggers turn-on at the first valley, reducing dv/dt and EMI. Internal protection features typically include over-current protection (OCP), over-temperature protection, under-voltage lockout (UVLO), and over-voltage protection (OVP), making it a complete controller for cost-effective, energy-efficient flyback converters.
Typical applications include AC-DC adapters and chargers for portable equipment, auxiliary and standby power supplies for desktop PCs and TVs, white goods and appliance power, set-top boxes, and industrial low-power offline converters. Quasi-resonant operation makes it especially well suited to designs targeting ENERGY STAR, DoE Level VI, and EU CoC Tier 2 efficiency standards.
When designing with this device, the transformer's primary-side leakage inductance and the auxiliary VDD winding must be sized correctly to ensure the controller stays above its UVLO threshold under all load transients. Failure to maintain adequate VDD margin is the most common cause of UCC28600 start-up or hiccup-mode issues in production designs.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet to support your component selection, BOM risk assessment, and second-sourcing decisions.
直接替换替代料： UCC28600D ——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： UCC28600D （相同外形与封装尺寸） ——差异在于 Control Mode, Green-Mode Operation, Operating Temperature Range, Package, Protection Features.
快速对比工具——选择替代料号进行并排对比：
UCC28600DG4
✅ 直接替换📋 参考替代料（不在目录中）
UCC28600DR
✅ 直接替换📋 参考替代料（不在目录中）
UCC28600DRG4
✅ 直接替换📋 参考替代料（不在目录中）
UCC28610D
✅ 直接替换📋 参考替代料（不在目录中）
UCC28610DR
✅ 直接替换📋 参考替代料（不在目录中）
UCC28600D 最大额定值与电气特性
| 拓扑 | Flyback (quasi-resonant) |
| 开关频率 | 40 kHz to 130 kHz |
| 封装 | SOIC-8 (D) |
| 引脚数量 | 8 |
| 工作温度范围 | -40 C to +105 C |
| 安装类型 | Surface Mount |
| 输出电压 | Offline / isolated (controller, no integrated MOSFET) |
| Control Mode | Current-mode PWM with quasi-resonant valley switching |
| Green-Mode Operation | Yes (frequency fold-back / burst-mode at light load) |
| Protection Features | OCP, OVP, OTP, UVLO |
| Startup Mechanism | Internal high-voltage start-up current source |
| MSL 等级 | 1 |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
| 无卤 | Yes |
UCC28600D 引脚配置
| 引脚 1 | VDD — Supply voltage for the controller; bypass with 1 uF to GND |
| 引脚 2 | VSENSE — Output voltage feedback input (via opto / divider) |
| 引脚 3 | ZCD — Zero-current / valley detection input from auxiliary winding |
| 引脚 4 | GND — Ground reference |
| 引脚 5 | CS — Current-sense input (MOSFET source resistor) |
| 引脚 6 | DRV — Gate drive output to external power MOSFET |
| 引脚 7 | HV — High-voltage start-up current source input (rectified mains) |
| 引脚 8 | NC — Not connected (per datasheet) |
典型应用
UCC28600D 适用于 6 应用s: AC-DC Adapters and Chargers (5-30 W), Desktop PC and TV Standby/Auxiliary Power, White Goods and Major Home Appliances, Set-Top Boxes and Streaming Media Players, Industrial Low-Power Offline Converters, LED Lighting Drivers (Isolated, Low Power).
AC-DC Adapters and Chargers (5-30 W)
The UCC28600D is the primary-side controller of choice for low-power AC-DC adapters and chargers for phones, tablets, and small appliances. Its quasi-resonant valley switching at 40 kHz to 130 kHz reduces MOSFET switching losses by 20-30% versus fixed-frequency PWM, while the built-in frequency fold-back and green-mode operation pull no-load standby power below 75 mW - comfortably meeting DoE Level VI and EU CoC Tier 2 efficiency. Typical designs use a 600 V or 800 V MOSFET on the primary, a snubber network sized for QR valley detection, and an auxiliary VDD winding that keeps the controller above its UVLO threshold during transient load steps. The 8-pin SOIC footprint and minimal external components (CS resistor, ZCD network, feedback divider) enable single-sided PCB layouts under 25 mm x 25 mm.
推荐
Desktop PC and TV Standby/Auxiliary Power
UCC28600D is widely deployed as the auxiliary/standby controller inside desktop PCs and televisions, where the system always-on 5VSB rail must draw under 100 mW in standby. The quasi-resonant topology delivers 4-star to 5-star efficiency at 25%/50%/100% load while the green-mode burst operation drives standby below the 0.5 W threshold required by CEC and EUP Lot 6. The controller's internal high-voltage start-up current source eliminates an external bleed resistor, reducing BOM cost by roughly $0.05 per unit. Designers typically pair the UCC28600D with a 0.5 W AOP-style opto coupler such as PC817 and a TL431 reference in the secondary feedback path, achieving cross-regulation tight enough for 5VSB +/- 5% across a 0.1-2 A load range.
推荐
White Goods and Major Home Appliances
Industrial-grade UCC28600D variants (operating -40 C to +105 C) are specified into white-goods power supplies for washing machines, refrigerators, and microwave ovens. Quasi-resonant operation reduces conducted EMI that could otherwise interfere with the appliance's motor-control microcontroller, and the integrated OCP/OVP/OTP protection suite meets the IEC 60335 household-appliance safety requirements. Quasi-resonant flyback supplies built around UCC28600D typically operate from universal AC input (85-265 VAC) and deliver 12-24 V at 0.5-2 A, providing the auxiliary power rail for the appliance's main inverter board. The wide operating temperature range and integrated HV start-up source reduce the need for derating in high-ambient compartments near motor drives or heating elements.
推荐
Set-Top Boxes and Streaming Media Players
Set-top boxes and streaming media players use the UCC28600D as the primary-side controller of their offline power supply, where high efficiency across the full load range and very low standby are critical. The 40 kHz to 130 kHz quasi-resonant switching enables a small-form-factor transformer (typically EE16 or EE19 core), keeping the PSU footprint compact enough to fit inside the slim chassis of a streaming stick or set-top box. The green-mode frequency fold-back drops switching frequency below 25 kHz at very light loads, eliminating audible transformer noise that would otherwise disturb the consumer's media playback. Typical designs deliver a single 12 V/1 A output or a multi-rail 12 V/5 V/3.3 V architecture with the UCC28600D controlling the primary and small synchronous buck ICs handling the secondary rails.
推荐
Industrial Low-Power Offline Converters
UCC28600D-based quasi-resonant flyback converters are common in industrial sensor power supplies, building-automation gateways, and HVAC controllers where isolated low-power DC rails (24 V, 12 V, 5 V) must operate reliably from universal AC mains. Quasi-resonant operation reduces EMI emissions that could affect nearby sensitive analog signal-conditioning circuits, while the integrated OVP/OTP features simplify compliance with IEC 61000-4-2/4-4/4-5 surge and ESD requirements. The UCC28600D's internal HV start-up source means the converter can boot from a 110/220 VAC line within 500 ms, which is critical for industrial systems that must complete a self-test on every power-up cycle. Designs typically deliver 5-15 W isolated output and are deployed in industrial PoE injectors, PLC analog-input modules, and factory-sensor power hubs.
推荐
LED Lighting Drivers (Isolated, Low Power)
Isolated LED lighting drivers up to 25 W use the UCC28600D as the primary-side flyback controller to meet harmonic-current and efficiency standards such as EN 61000-3-2 Class C and ENERGY STAR Lamps V2.1. Quasi-resonant valley switching and green-mode operation keep driver efficiency above 85% across the full dimming range, which is essential for high-lumen LED fixtures where thermal management is already challenging. The integrated over-current protection (OCP) on the CS pin provides cycle-by-cycle current limiting that doubles as an LED short-circuit protection mechanism, while over-temperature protection shuts the converter down if the driver overheats. Designers typically deliver a constant-current output of 350-700 mA at 24-48 VDC and pair the UCC28600D primary with a TL431 + opto on the secondary for closed-loop LED current regulation.
推荐
推荐产品汇总
工程参考数据： UCC28600D ——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 | UCC28600DG4 | UCC28600DR | UCC28600DRG4 | UCC28610D | UCC28610DR |
|---|---|---|---|---|---|---|
| Package | SOIC-8 (D) | SOIC-8 (D) - same | SOIC-8 (D) - same | SOIC-8 (D) - same | SOIC-8 (D) - same | SOIC-8 (D) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Topology | Quasi-resonant flyback | Quasi-resonant flyback | Quasi-resonant flyback | Quasi-resonant flyback | Quasi-resonant flyback (enhanced) | Quasi-resonant flyback (enhanced) |
| Switching Frequency | 40-130 kHz | 40-130 kHz | 40-130 kHz | 40-130 kHz | 40-130 kHz (programmable) | 40-130 kHz (programmable) |
| Pin Count | 8 | 8 | 8 | 8 | 8 | 8 |
| Operating Temperature | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C |
| Packaging Variant | Tube (D) | Tube (D) - same die | Tape & Reel (DR) | Tape & Reel (DR) G4 | Tube (D) | Tape & Reel (DR) |
关键差异点
- Quasi-resonant valley switching for lowest switching losses （对比 UCC28C42 (fixed-frequency PWM controller))
- Integrated high-voltage start-up current source （对比 Discrete RCD start-up network in fixed-frequency designs)
- Green-mode frequency fold-back below 1 W load （对比 UCC28600 fixed-frequency counterparts)
设计说明
Estimated: at VIN = 12 V, VDD = 12 V, and 5 mA controller quiescent supply, the UCC28600D dissipates approximately 60 mW. The SOIC-8 package has a typical theta_JA of 120 C/W (JEDEC EIA/JESD51-2 4-layer board), resulting in a 7 C junction temperature rise above ambient - no external heatsink is required. However, in tightly enclosed adapters with poor airflow, derate by 30% and ensure the VDD input capacitor is rated to 105 C or higher for long-term reliability.
Keep the high-voltage HV pin trace (pin 7) short and away from the ZCD pin (pin 3) to minimize capacitive coupling that could corrupt valley detection. Place the VDD bypass capacitor (1 uF X7R minimum) within 5 mm of pin 1 and the CS filter capacitor (typically 100 pF-1 nF) directly at pin 5. The ZCD network (resistor + small capacitor) must return to GND within 5 mm of pin 4 to avoid false triggering caused by the auxiliary-winding ringing.
The most common production failures are caused by undersized auxiliary VDD winding: if VDD drops below the UVLO threshold under step load, the controller enters hiccup mode. Ensure VDD stays at least 1 V above the UVLO turn-off threshold (typically 9 V) under the worst-case load step. Additionally, do not omit the CS filter capacitor - without it, the CS pin can falsely trigger OCP due to leading-edge current spikes from the MOSFET capacitance. Finally, the DRV pin should be kept away from the CS pin trace to avoid false triggering caused by the gate-drive dV/dt.
Use a single-point ground connection between the controller GND (pin 4) and the CS return path - this prevents high-current ground loops from shifting the CS reference and causing OCP misfires. Place the ZCD network resistor-diode-capacitor cluster directly at pin 3 with traces less than 10 mm. For best EMI performance, keep the DRV trace short and surrounded by GND on both sides to minimize radiated emissions from the high-dV/dt MOSFET gate drive.
合规信息
RoHS compliant per TI product page. Not AEC-Q100 qualified (industrial/consumer, not automotive). Halogen-free and lead-free per TI packaging material declaration.
