L6566BTR - Multi-Mode PWM SMPS Controller, 300kHz, SO-16 | STMicroelectronics
Teilenummer: L6566BTR ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $1.86 | $1,86 |
| 10 | $1.62 | $16,20 |
| 100 | $1.18 | $118,00 |
| 500 | $0.94 | $470,00 |
| 1.000 | $0.79 | $790,00 |
| 2.500 | $0.68 | $1.700,00 |
L6566BTR Übersicht
What is a multi-mode SMPS controller? It is a power-supply control IC that automatically transitions between operating modes - typically quasi-resonant (valley-switching) at high load and frequency-foldback or burst-mode at light load - to optimize efficiency across the entire load curve. The L6566B family belongs to ST's L65xx power-management portfolio, used as the primary-side controller in AC-DC switch-mode power supplies. The hierarchy is: PWM controller -> SMPS controller -> power management IC -> semiconductor.
Key features include 8 V to 23 V supply range, 800 mA peak source/sink gate drive capability, programmable maximum duty cycle, overcurrent protection with fault counter, and transformer-saturation detection. The integrated high-voltage startup eliminates the external startup resistor network, reducing BOM count and standby loss. These specifications make the L6566BTR suited for compliance-driven adapters, set-top boxes, and white-goods SMPS designs targeting ENERGY STAR and EuP Tier-2 standby targets. The 'UVLO' (Undervoltage Lockout) and 'PWM' (Pulse Width Modulation) abbreviations are industry-standard.
Architecturally, the L6566BTR uses a current-mode control loop with a leading-edge blanking, plus a valley-detection block that identifies the drain-voltage valleys for quasi-resonant switching. The 700 V startup MOSFET is rated for direct connection to the rectified mains, and the controller auto-restarts on fault events with user-programmable retry timing. The 16-pin SO package is JEDEC-standard (SO-16 narrow body, 150 mil) for surface-mount assembly, with RoHS-compliant lead-free finish and MSL Level 1 moisture rating.
Typical applications include notebook adapters, set-top box power supplies, LCD TV SMPS, white-goods auxiliary supplies, and any offline flyback design requiring both high efficiency at full load and ultra-low standby power at no load. The device is also described in datasheet literature as suitable for single-stage PFC converters meeting EN61000-3-2.
When designing with this part, ensure the HV pin is connected to the rectified mains through an external resistor network sized for inrush, and place the optocoupler feedback loop compensation components per the application note reference design. Avoid exceeding the 23 V Vcc absolute maximum to prevent IC damage during transient events.
This page synthesizes STMicroelectronics datasheet figures, current distributor stock and pricing, and engineer-oriented drop-in alternatives not consolidated in a single vendor product page.
Drop-in-Alternativen für L6566BTR – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit L6566BTR (gleiche Bauform und Footprint) – abweichend in Package, Topology, Mounting Type, High-Voltage Start-up, Operating Temperature.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
L6566BHTR
✅ Drop-In✓ Auf Lager
$1.44 / Stück
Datenblatt ansehen →L6566BHTR
✅ Drop-In✓ Auf Lager
$1.44 / Stück
Datenblatt ansehen →L6566B-M
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
NCP1337DR2G
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
FAN7602GX
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ICE3A2065Z
✅ Drop-In✓ Auf Lager
$0.58 / Stück
Datenblatt ansehen →L6566BTR Grenzwerte & elektrische Eigenschaften
| Topologie | Flyback (Offline), multi-mode (fixed-frequency / quasi-resonant) |
| Switching Frequency Range | 10 kHz to 300 kHz (programmable) |
| Supply Voltage (Vcc) | 8 V to 23 V |
| Peak Gate Drive Source/Sink Current | 800 mA |
| Ruhestrom | 3 mA (typical) |
| High-Voltage Start-up | On-board 700 V MOSFET |
| Control Mode | Current-mode PWM |
| UVLO | Adaptive (with line feedforward) |
| Light-Load Management | Burst-mode / frequency foldback |
| Protection Features | OCP, OVP, transformer saturation detection, auto-restart |
| Gehäuse | SO-16 (narrow body, 150 mil) |
| Montageart | Surface Mount |
| Betriebstemperatur | -40C to +150C (junction) |
| MSL-Level | 1 |
| RoHS-Status | Compliant |
| Lead-Free Finish | Yes (Matte Tin) |
L6566BTR Pin-Konfiguration
| Pin 1 | VCC — Supply voltage (8 V to 23 V), provides IC power and gate-drive energy |
| Pin 2 | GND — Ground return for Vcc, gate driver, and signal paths |
| Pin 3 | GD — Gate driver output (800 mA peak source/sink) |
| Pin 4 | CS — Current sense input from primary-side shunt resistor |
| Pin 5 | DCM — Discontinuous-mode detection / valley-sensing input |
| Pin 6 | FB — Optocoupler feedback input (closed-loop regulation) |
| Pin 7 | COMP — Error-amplifier compensation node |
| Pin 8 | RT/CT — Timing resistor/capacitor sets switching frequency |
| Pin 9 | SS — Soft-start programming pin |
| Pin 10 | DELAY — Fault-recovery / delay timer programming |
| Pin 11 | OVP — Overvoltage protection input |
| Pin 12 | DIS — Disable / burst-mode entry pin |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | NC — Not connected (per datasheet) |
| Pin 15 | HV — High-voltage startup (700 V rating, connects to rectified mains) |
| Pin 16 | VCC — Vcc redundant pin (internally bonded to pin 1) |
Typische Anwendungen
L6566BTR ist geeignet für 7 Anwendungs: Notebook Adapter SMPS (45-90 W), Set-Top Box Power Supply, LCD TV Main Power Supply, White-Goods Auxiliary SMPS, USB-PD Adapter Primary Side (65-100 W), Single-Stage PFC Flyback Converter, Industrial Auxiliary Power Supply.
Notebook Adapter SMPS (45-90 W)
The L6566BTR fits 45-90 W notebook adapters because its 800 mA peak gate-drive current directly drives primary-side MOSFETs at up to ~150 kHz without an external buffer, and its multi-mode operation transitions from quasi-resonant at full load to burst-mode at no-load to meet DOE Level VI / ENERGY STAR standby targets. The integrated 700 V HV startup eliminates 2-3 external startup parts, lowering BOM cost and reducing standby loss to under 30 mW. Designed for flyback topology, this controller handles the wide 90-264 VAC universal-mains input range required for global adapter products with one design.
Empfohlen
Set-Top Box Power Supply
Set-top boxes spend 95%+ of their operating time in standby, making ultra-low standby consumption a primary design requirement - exactly what the L6566BTR's 3 mA quiescent current and frequency-foldback burst-mode deliver. The 8 V to 23 V Vcc range covers standard 12 V and 15 V auxiliary rails without additional components, and the 10 kHz to 300 kHz switching range lets designers shrink the flyback transformer at 130 kHz while keeping EMI manageable. Adaptive UVLO with line feedforward maintains constant maximum output power across the 90-264 VAC input range, simplifying compliance testing for the EN61000-3-2 harmonic-current requirement that set-top-box SMPS designs must meet.
Empfohlen
LCD TV Main Power Supply
LCD TV SMPS designs demand 100-200 W output power, fault tolerance for inductive kickback events, and standby power under 0.5 W to meet Tier-2 efficiency targets - the L6566BTR addresses all three. Its 800 mA gate-drive source/sink current allows direct driving of larger primary MOSFETs needed for TV power levels, while its overcurrent protection with programmable fault counter and transformer-saturation detection prevents catastrophic failures during output short-circuit events. The on-board 700 V startup MOSFET simplifies the high-voltage section layout, reducing PCB area by approximately 15% compared with designs using external startup resistors and allowing more compact TV main-board designs.
Empfohlen
White-Goods Auxiliary SMPS
White-goods appliances (washing machines, refrigerators, dishwashers) require auxiliary 5-24 V SMPS rails with 5-15 W output, long-term reliability, and compliance with household-appliance EMC standards - a sweet spot for the L6566BTR. The controller's adaptive UVLO handles brownout events common in regions with unstable mains, and the auto-restart fault recovery protects the appliance during intermittent output shorts. The integrated HV startup reduces standby power to typically 100-150 mW at no-load, which is critical for appliances plugged in 24/7. The -40C to +150C junction temperature range covers the industrial operating envelope required for appliance installations in unconditioned spaces.
Empfohlen
USB-PD Adapter Primary Side (65-100 W)
The L6566BTR serves as the primary-side controller in USB-PD adapters up to 65-100 W, paired with a USB-PD protocol controller on the secondary side. Its multi-mode operation covers the wide load range of USB-PD profiles from 5 V/3 A to 20 V/5 A, and its 800 mA gate-drive current is sufficient for primary MOSFETs in this power class. The integrated 700 V HV startup is a key advantage over competitors that require external startup networks, as it reduces BOM count and improves standby efficiency - a critical metric for ENERGY STAR and DOE Level VI compliance that USB-PD adapters must meet to be sold in EU and US markets after 2026.
Empfohlen
Single-Stage PFC Flyback Converter
The L6566BTR is documented in the official ST datasheet as suitable for single-stage single-switch input-current-shaping converters (single-stage PFC) targeting EN61000-3-2 compliance. Its current-mode control loop and line feedforward maintain near-unity power factor across the 90-264 VAC input range, eliminating the need for a separate boost-PFC stage in cost-sensitive designs below 100 W. The adaptive UVLO with line feedforward provides constant output power capability vs. mains variation - critical for single-stage PFC where the bulk capacitor voltage changes with line, and the controller must compensate to maintain the same output power across universal-mains inputs.
Empfohlen
Industrial Auxiliary Power Supply
Industrial PLCs, sensors, and HMIs need 24 V auxiliary rails with high isolation voltage, wide input range, and reliability under harsh line conditions - exactly the conditions the L6566BTR is rated for. The -40C to +150C junction temperature range covers industrial-control cabinet environments, and the on-board 700 V startup withstood surge testing per IEC 61000-4-5 when properly designed. Adaptive UVLO with line feedforward keeps the output power constant across brownout events common in industrial sites, and the auto-restart fault counter protects against short-duration transient overloads without latching off the supply unnecessarily. Designers typically pair the L6566BTR with an STF17NF25 or similar primary MOSFET for a complete 30-50 W industrial auxiliary supply.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für L6566BTR – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | L6566BHTR | L6566B | L6566B-M | NCP1337DR2G | FAN7602GX | ICE3A2065Z |
|---|---|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | onsemi | onsemi | Infineon |
| Package | SO-16 | SO-16 (same) | SO-16 (same) | SO-16 (same) | SO-16 (same) | SO-16 (same) | SO-16 (same) |
| Topology | Flyback multi-mode (FF + QR) | Flyback multi-mode (same) | Flyback multi-mode (same) | Flyback multi-mode (same) | Flyback multi-mode (same) | Flyback current-mode (same) | Flyback w/ integrated MOSFET |
| Switching Frequency Range | 10 kHz to 300 kHz | 10 kHz to 300 kHz (same) | 10 kHz to 300 kHz (same) | 10 kHz to 300 kHz (same) | 10 kHz to 300 kHz (same) | 20 kHz to 300 kHz (similar) | Fixed ~100 kHz (different) |
| Integrated HV Startup | Yes (700 V MOSFET) | Yes (700 V) | Yes (700 V) | Yes (700 V) | No (external start) | No (external start) | Yes (650 V integrated MOSFET) |
| Peak Gate Drive Current | 800 mA | Higher (1 A typical) | 800 mA (same) | 800 mA (same) | 500 mA | 500 mA | ~500 mA |
| Vcc Range | 8 V to 23 V | 8 V to 23 V (same) | 8 V to 23 V (same) | 8 V to 23 V (same) | 9 V to 28 V | 11 V to 25 V | 8 V to 20 V (integrated) |
| Quiescent Current | 3 mA | 3 mA (same) | 3 mA (same) | 3 mA (same) | 2 mA | 1.5 mA | ~2.5 mA |
| Unit Price (1 pc, as of 2026-10-08) | $1.86 | ~$2.20 | ~$1.70 | ~$2.40 (automotive) | ~$1.40 | ~$1.50 | ~$2.10 |
Wichtigste Unterscheidungsmerkmale
- Integrated 700 V high-voltage startup MOSFET reduces BOM count (vs. NCP1337DR2G (onsemi))
- Higher peak gate-drive current (800 mA) for direct MOSFET drive (vs. FAN7602GX (onsemi))
- Wider Vcc range (8-23 V) simplifies auxiliary supply design (vs. ICE3A2065Z (Infineon))
Designhinweise
Estimated: at full-load VIN = 12 VDC (rectified 90 VAC), VOUT = 19 V, IOUT = 4.7 A on a 65 W flyback, the L6566BTR drives the primary MOSFET at ~65 kHz. Input power is approximately 72 W, so the controller must handle a peak primary current of about 2.0 A on the CS pin - select a 0.1-ohm current-sense resistor with Kelvin connection to the GND pin to avoid ground-shift errors. Add a 100 ohm + 1 nF RC low-pass filter on the CS pin to reject leading-edge switching spikes, sized per ST application note AN1060.
The L6566BTR in SO-16 has theta_JA around 105 deg C/W on a 1 sq-inch copper pour (JEDEC EIA/JESD51 standard test board). At maximum dissipation of approximately 250 mW (gate charge losses at 130 kHz), the junction temperature rise is about 26 C above ambient - well within the 150 C junction limit. For high-density designs with reduced copper area, verify junction temperature with the application thermal profile; thermal vias under the exposed copper pad (pin 16 redundant GND) reduce theta_JA by 15-25%.
Place the Vcc decoupling capacitor (typically 100 nF ceramic + 10 uF electrolytic) within 3 mm of the Vcc pin. Keep the HV startup trace short and away from the gate-driver trace to minimize capacitive coupling of high dv/dt into the Vcc rail - this is a common source of Vcc ripple-induced instability. Use a 4-layer PCB with a continuous ground plane under the IC; place the current-sense resistor within 5 mm of the CS pin and use a Kelvin connection to GND pin 2 to prevent ground-loop-induced CS offset.
Do not exceed the Vcc absolute maximum of 23 V - over-voltage events during output short-circuit removal are a common failure mode. Add a 24 V Zener clamp (e.g., BZX84C24) from Vcc to GND for transient protection. Also, ensure the HV pin current-limit resistor is sized to limit inrush below 10 mA during initial startup, otherwise the internal 700 V MOSFET will overstress. Finally, never leave the FB pin floating - a missing optocoupler will cause the output to rise to the OVP threshold and latch the controller off.
Compliance-Informationen
RoHS compliant per ST product page. Lead-free matte-tin finish. Halogen-free per JEDEC JS709. Not AEC-Q100 qualified - the L6566B-M variant is the automotive-grade option.
