UCC28600TDRQ1 - 8-Pin Quasi-Resonant Flyback Green-Mode Controller | Texas Instruments
Артикул: UCC28600TDRQ1 ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $1.92 | $1,92 |
| 10 | $1.73 | $17,30 |
| 100 | $1.42 | $142,00 |
| 500 | $1.18 | $590,00 |
| 1.000 | $1.05 | $1.050,00 |
| 2.500 | $0.96 | $2.400,00 |
UCC28600TDRQ1 Обзор
A quasi-resonant flyback controller is a current-mode PWM controller that switches the MOSFET at the drain-voltage valley rather than at a fixed frequency. This valley-switching technique (also called valley-skipping or QR operation) reduces switching losses, lowers EMI emissions, and improves light-load efficiency compared with conventional hard-switched flyback designs. Within the broader power-supply hierarchy, it sits between the bridge rectifier/PFC front end and the isolated transformer secondary, governing energy transfer during each switching cycle.
Key features of the UCC28600TDRQ1 include quasi-resonant mode operation for reduced EMI and low switching losses, a green-mode controller with advanced energy-saving features, frequency foldback at light load, low standby current, and over-temperature/over-current protection. The -Q1 suffix denotes AEC-Q100 Grade 1 automotive qualification, supporting under-the-hood and infotainment applications that demand -40 °C to +105 °C operation. The internal high-voltage startup and frequency-jitter block minimize external component count, enabling a compact, low-BOM-count adapter.
Internally, the device combines a current-mode control loop, a valley-detection comparator, a programmable minimum-frequency clamp, and a soft-start sequencer. The result is a controller that adapts its switching frequency to the instantaneous load: at heavy load the converter operates near 130 kHz at the drain valley; at light or no load it folds back to 40 kHz or lower to maintain efficiency. According to TI design calculator SLVC104, the loop compensation, transformer turns ratio, and primary inductance are jointly optimized around the UCC28600 to achieve >85 % average efficiency.
Typical applications include smartphone and tablet AC/DC adapters (5 W to 65 W), notebook laptop chargers, standby/auxiliary supplies in LCD TVs and white goods, LED lighting drivers, and automotive 12 V battery-powered systems such as USB chargers and infotainment rails. Any flyback topology where world-wide energy standards (DoE Level VI, CoC Tier 2, ENERGY STAR) apply is a strong candidate.
When designing with the UCC28600TDRQ1, the primary-side MOSFET's drain-voltage ringing must remain within the controller's valley-detection window; otherwise the converter will hard-switch and lose its EMI advantage. Use the SLVC104 design calculator to size the primary inductance and transformer turns ratio, and follow TI's reference layout to keep the drain-sense trace short and well-shielded.
This page synthesizes distributor pricing, AEC-Q100 alternatives, drop-in package equivalents, and practical flyback design notes not found in the standalone manufacturer datasheet.
Аналоги без доработки для UCC28600TDRQ1 — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с UCC28600TDRQ1 (тот же форм-фактор и посадочное место) — отличается по Control Mode, Green-Mode Operation, Operating Temperature Range, Package, Protection Features.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
UCC28600TD
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
UCC28600D
✅ Прямая замена✓ В наличии
$0.98 / шт.
Открыть даташит →UCC28630DR
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
UCC2801QDREP
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
UCC28600TDRQ1 Максимальные параметры и электрические характеристики
| Топология | Flyback (Quasi-Resonant) |
| Control Mode | Current-mode PWM with valley switching |
| Input Voltage Range (VDD) | 8 V to 32 V |
| Switching Frequency Range | 40 kHz to 130 kHz |
| Корпус | 8-SOIC (3.90 mm / 0.154 in width) |
| Power Dissipation (max) | 650 mW |
| Диапазон рабочих температур | -40 °C to +105 °C (ambient) |
| AEC-Q100 Qualification | Grade 1 qualified (Q1 suffix) |
| Green-Mode Operation | Yes - frequency foldback at light load |
| Quasi-Resonant Mode | Yes - valley switching for reduced EMI |
| Startup Mechanism | Internal high-voltage startup |
| Protection Features | Over-temperature, over-current, VDD under-voltage lockout |
| Тип монтажа | Surface Mount |
| Статус RoHS | Compliant |
| Lead-Free | Yes |
Конфигурация выводов UCC28600TDRQ1
| Контакт 1 | GND — Ground return for the controller |
| Контакт 2 | VDD — Supply voltage input (8 V to 32 V), decoupled with 1 µF X7R |
| Контакт 3 | CS — Current sense input from primary-side sense resistor |
| Контакт 4 | DRV — Gate drive output for the external primary-side MOSFET |
| Контакт 5 | VS — Valley sensing input from the auxiliary winding |
| Контакт 6 | FB — Feedback input from optocoupler/secondary-side error amplifier |
| Контакт 7 | RT — Timing resistor to set maximum switching frequency |
| Контакт 8 | SS — Soft-start programming pin |
Типичное применение
UCC28600TDRQ1 подходит для 6 применениеs: Smartphone / Tablet AC/DC Adapter (5 W-65 W), Automotive 12 V Battery-Powered Infotainment Rail, Notebook Laptop Charger / Power Brick, LED Lighting Driver (Off-Line, Isolated), Standby / Auxiliary Supply for LCD TV or White Goods, Industrial Auxiliary / Bias Supply (24 V Bus).
Smartphone / Tablet AC/DC Adapter (5 W-65 W)
The UCC28600TDRQ1 is well-suited to 5-65 W flyback adapters where world-wide energy standards (DoE Level VI, CoC Tier 2) mandate >85 % average efficiency. The 40-130 kHz quasi-resonant switching with valley detection reduces switching losses and EMI, allowing the adapter to meet EN 55022 Class B without complex filtering. Placed between the bridge rectifier and the primary-side MOSFET, the controller sustains VDD via the auxiliary winding while the SLVC104 design calculator sizes the transformer turns ratio for the target 5 V/12 V/20 V output rail. Compared with fixed-frequency controllers, the UCC28600TDRQ1 typically delivers 3-5 % higher efficiency at light loads.
Рекомендуется
Automotive 12 V Battery-Powered Infotainment Rail
AEC-Q100 Grade 1 qualification makes the UCC28600TDRQ1 appropriate for under-the-hood and infotainment applications that demand -40 °C to +105 °C ambient operation with PPAP documentation. The 8-32 V VDD range directly accepts a 12 V automotive battery with cold-crank and load-dump transients, while the internal HV startup regulator eliminates an external startup resistor. The flyback topology isolates the USB-charging or infotainment rail from the battery, and the green-mode foldback keeps quiescent draw below 100 mW at no-load - critical for always-on parked vehicles. SLVC104 helps size the primary inductance for a 5 V/2 A USB-PD rail.
Рекомендуется
Notebook Laptop Charger / Power Brick
The UCC28600TDRQ1's quasi-resonant valley-switching enables 65-90 W laptop bricks to meet ENERGY STAR and CoC Tier 2 average-efficiency requirements while keeping the EMI signature low enough to pass FCC Class B without a heavy input filter. Operating at the drain-voltage valley reduces dv/dt stresses on the primary MOSFET, allowing a smaller heat sink and lower-cost 600 V MOSFET. Green-mode foldback collapses switching frequency toward 40 kHz at no-load, dropping adapter standby consumption to <30 mW - essential for laptops sold into California and EU markets.
Рекомендуется
LED Lighting Driver (Off-Line, Isolated)
Isolated flyback LED drivers benefit from the UCC28600TDRQ1's low-EMI signature, which simplifies compliance with EN 55015 for residential and commercial luminaires. The QR valley-switching reduces conducted emissions, allowing a smaller common-mode choke and Y-cap network. Internal frequency foldback keeps driver efficiency above 85 % even at the 10 % dimming setpoint, where conventional fixed-frequency controllers lose efficiency to switching losses. SLVC104 sizes the transformer for the target LED string voltage (24 V to 48 V typical), and the UCC28600TDRQ1 accepts the rectified 110 V/220 V mains directly via VDD.
Рекомендуется
Standby / Auxiliary Supply for LCD TV or White Goods
White goods (washing machines, refrigerators) and LCD TVs require a low-power standby rail that persists even when the main converter is off. The UCC28600TDRQ1 handles this auxiliary role at <100 mW standby, while its flyback topology provides the isolation required by IEC 60335. Green-mode frequency foldback maintains efficiency across the wide load range - from a few mW (clock/microcontroller keep-alive) to several hundred mW (relay/display driver). The 8-SOIC footprint simplifies routing on the densely packed main board, and SLVC104 supports rapid transformer sizing for 5 V/12 V/24 V standby rails.
Рекомендуется
Industrial Auxiliary / Bias Supply (24 V Bus)
Industrial 24 V bus systems often require isolated +5 V or +12 V bias rails for gate drivers, isolators, and microcontroller keep-alive circuits. The UCC28600TDRQ1's 8-32 V VDD range accepts the 24 V industrial bus directly without pre-regulation, while the flyback topology provides the galvanic isolation required for IGBT gate-driver bias. Quasi-resonant switching keeps EMI below EN 61131-2 limits for programmable logic controllers, and the internal HV startup eliminates an external startup resistor - reducing BOM count by one component. AEC-Q100 qualification gives extra margin in harsh factory environments.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для UCC28600TDRQ1 — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | UCC28600TD | UCC28600D | UCC28630DR | UCC2801QDREP |
|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Topology | Quasi-Resonant Flyback | Quasi-Resonant Flyback | Quasi-Resonant Flyback | Quasi-Resonant Flyback | Fixed-Frequency Current-Mode PWM |
| Switching Frequency | 40 kHz to 130 kHz (valley-switching) | 40 kHz to 130 kHz | 40 kHz to 130 kHz | 40 kHz to 130 kHz | Fixed (programmable via RT) |
| AEC-Q100 Grade | Grade 1 | Not qualified (industrial) | Not qualified (industrial) | Not qualified (industrial) | Grade 1 (QREP suffix) |
| 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 +125 °C |
| Green-Mode / Frequency Foldback | Yes | Yes | Yes | Yes | No |
Ключевые отличия
- AEC-Q100 Grade 1 automotive qualification on the same silicon die (против UCC28600TD)
- Quasi-resonant valley-switching reduces EMI and switching losses (против UCC2801QDREP)
- Internal high-voltage startup eliminates external startup resistor (против UCC28C42)
Заметки по проектированию
Per TI UCC28600 datasheet: the auxiliary-winding valley-sense trace must be short and well-shielded; a long trace picks up ringing that causes the controller to skip valleys unpredictably and hard-switch the MOSFET. Place the VS-pin decoupling and the auxiliary divider within 5 mm of the IC, and route the trace over a continuous ground pour. According to TI E2E forum, this is the single most common cause of EMI failures in UCC28600 designs.
Per TI UCC28600 datasheet layout guidelines: separate the primary-side high-voltage loop (rectifier-primary-transformer-MOSFET-CS resistor) from the secondary-side loop with a moat and a single-point ground at the CS resistor. Keep the gate-drive return trace short and direct - any impedance in the DRV return causes MOSFET Rds_on heating and shoot-through. The Y-cap across the isolation barrier should be placed at the transformer secondary return to shunt common-mode EMI before it reaches the secondary rectifier.
Estimated: at 650 mW maximum dissipation and an 8-SOIC theta_JA of approximately 150 °C/W on a 1 oz 1-square-inch copper pour, the UCC28600TDRQ1 junction temperature rises 100 °C above ambient. At 85 °C ambient this places the junction near 185 °C - below the 150 °C thermal limit only because typical dissipation is closer to 200-300 mW. Increase the copper pour to 2 square inches or add thermal vias to the exposed SOIC pad to keep Tj below 125 °C in enclosed adapters.
Per SLVC104 design calculator: size the primary inductance so that the valley at full load falls within the 40-130 kHz operating range. Too-small inductance forces the controller above the 130 kHz valley, losing the QR EMI advantage. Too-large inductance collapses the frequency below 40 kHz and increases transformer size unnecessarily. The calculator outputs recommended values for Csense, Rstart, and the auxiliary-winding turns ratio.
Per TI UCC28600 datasheet: the internal frequency-jitter block spreads the switching spectrum across roughly ±5 kHz, easing compliance with EN 55022 Class B conducted emissions. If the design still fails, add a 10 nF Y-cap at the transformer secondary return and a common-mode choke on the AC input. Avoid adding an input pi-filter unless necessary, because the QR controller's input-current waveform is already spread-spectrum-shaped and an extra inductor can cause subharmonic instability with the current-mode loop.
Информация о соответствии
AEC-Q100 Grade 1 qualified per TI UCC28600-Q1 product folder. RoHS and REACH compliant per DigiKey/Mouser listing. Conflict-minerals statement available from TI.
