L6591TR - ZVS Half-Bridge PWM Controller | STMicroelectronics
Teilenummer: L6591TR ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $3.51 | $3,51 |
| 10 | $3.16 | $31,60 |
| 100 | $2.81 | $281,00 |
| 500 | $2.46 | $1.230,00 |
| 1.000 | $2.11 | $2.110,00 |
L6591TR Übersicht
A half-bridge PWM controller (also called a resonant or ZVS half-bridge controller) is a power-management IC that drives two MOSFETs in a totem-pole arrangement across a transformer primary, switching at zero voltage across the drain-source of each FET to minimize switching losses. Within the broader power-electronics taxonomy, this places the device in: power management IC -> AC-DC converter -> resonant controller -> half-bridge ZVS controller. The soft-switching technique is widely used in switch-mode power supplies (SMPS) where efficiency and EMI performance are critical, including adapters, LCD-TV power, and telecom converters.
Key features include 500 kHz maximum switching frequency, programmable deadtime to avoid cross-conduction, adaptive Under-Voltage Lockout (UVLO) with line-sensing, pulse-by-pulse Over-Current Protection (OCP), latched or auto-restart Over-Load Protection (OLP), and advanced light-load management that disables one gate at low load to reduce circulation losses. The high-voltage start-up cell draws power directly from the bulk rail, eliminating an external auxiliary winding for start-up.
The L6591 employs a current-mode control architecture with a leading-edge blanking circuit on the current-sense input, providing clean cycle-by-cycle current limiting even with leading-edge spikes from the resonant tank. The integrated bootstrap driver for the high-side switch simplifies the gate-drive network and supports switching frequencies up to 500 kHz, well beyond conventional hard-switched half-bridge controllers.
Typical applications include resonant and quasi-resonant SMPS for LCD TVs, laptop adapters, game-console power supplies, telecom DC-DC converters, and industrial AC-DC adapters. Designers choose the L6591TR when ZVS operation is required for efficiency above 90% and reduced EMI versus hard-switched topologies.
A critical design consideration is the deadtime programming: too short causes shoot-through losses, too long increases body-diode conduction. The companion L6668 (multi-mode controller) and the L6599 (LLC resonant half-bridge with high-voltage start-up) are members of the same ST controller family; the L6591TR remains a cost-effective choice for ZVS half-bridge topologies below ~200 W.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, including cross-brand pin-compatible equivalents and recommended companion power MOSFETs for resonant tank designs.
Drop-in-Alternativen für L6591TR – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
L6591
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
L6591D
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
L6591N
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
NCP1396AADR2G
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
NCP1336ADR2G
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
L6591TR Grenzwerte & elektrische Eigenschaften
| Topologie | Half-Bridge (Soft-Switched ZVS) |
| Switching Frequency (max) | 500 kHz |
| Duty Cycle | D < 50% (complementary high/low-side drive) |
| Supply Voltage (operating) | 8.7 V to 22 V |
| High-Voltage Start-up | On-board (internal HV start-up cell) |
| Deadtime | Externally programmable |
| UVLO | Adaptive (with line sensing) |
| Over-Current Protection | Pulse-by-pulse OCP |
| Over-Load Protection | Latched or auto-restart (selectable) |
| Light-Load Management | Yes (advanced) |
| Output Current (Gate Drive) | 800 mA (min source/sink) |
| Betriebstemperaturbereich | -40 C to +150 C (Tj) |
| Gehäuse | 16-SOIC (SO-16, 3.90 mm body width) |
| Montageart | Surface Mount |
| Control Mode | Current Mode (double-ended) |
| MSL-Level | 1 (unlimited) |
| RoHS-Status | Compliant |
L6591TR Pin-Konfiguration
| Pin 1 | RT/CT — Oscillator timing R and C; sets switching frequency |
| Pin 2 | DT — Deadtime programming resistor |
| Pin 3 | CS — Current-sense input (with leading-edge blanking) |
| Pin 4 | COMP — Compensation network for current-mode loop |
| Pin 5 | EN/STOP — Enable / latch-off input |
| Pin 6 | GND — Ground |
| Pin 7 | LVG — Low-side gate-drive output |
| Pin 8 | VCC — Supply voltage (8.7 V to 22 V) |
| Pin 9 | OUT — Not used on this package variant (NC) - per datasheet |
| Pin 10 | BOOT — Bootstrap supply for high-side driver |
| Pin 11 | HV — High-voltage start-up input (up to 500 V) |
| Pin 12 | NC — Not connected (per datasheet) |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | NC — Not connected (per datasheet) |
| Pin 15 | HVG — High-side gate-drive output |
| Pin 16 | VBOOT — Bootstrap rail referenced to HVG return |
Typische Anwendungen
L6591TR ist geeignet für 6 Anwendungs: LCD TV Power Supply (75-200 W ZVS Half-Bridge), Laptop and Gaming-Console Adapter (90-150 W), Telecom DC-DC Brick (48 V to 12 V / 24 V, 100-200 W), Industrial AC-DC Adapter (100-180 W), Audio Amplifier SMPS (100-300 W), LED Backlight Driver / Industrial LED Power Supply.
LCD TV Power Supply (75-200 W ZVS Half-Bridge)
The L6591TR fits 75-200 W LCD-TV power supplies because its 500 kHz ZVS half-bridge capability, on-board HV start-up, and programmable deadtime deliver 90%+ efficiency at the power levels common in flat-panel displays. The internal HV start-up cell eliminates an auxiliary winding, simplifying transformer design. In a typical application the L6591TR drives a pair of STP11NM50FP MOSFETs in a totem-pole across a resonant tank, with the deadtime resistor set to 200-300 ns for 200 kHz switching. Compared to hard-switched topologies, the L6591TR cuts EMI by 6-10 dB on the input side and reduces heatsink size by 30-40%, enabling slim TV chassis designs.
Empfohlen
Laptop and Gaming-Console Adapter (90-150 W)
The L6591TR is well-suited for 90-150 W laptop and game-console adapters where ZVS half-bridge operation meets 90+ Energy Star efficiency and CoC Tier-2 no-load standby requirements. The advanced light-load management feature disables one gate drive at low load to cut circulation losses, dropping standby consumption below 100 mW. Operating at 150-250 kHz with an EE25 or EE30 transformer, the L6591TR achieves power density above 10 W/inch-cubed. The pulse-by-pulse OCP and latched OLP provide robust short-circuit protection required by IEC 60950 / IEC 62368 safety standards for IT equipment.
Empfohlen
Telecom DC-DC Brick (48 V to 12 V / 24 V, 100-200 W)
The L6591TR fits 48 V telecom bus converters where ZVS half-bridge operation delivers high efficiency (92-94%) at the 100-200 W power levels common in distributed-power architectures. Its adaptive UVLO with line sensing is critical for telecom hold-up requirements, ensuring orderly shutdown during brownout events. The 8.7-22 V VCC range accommodates bias rails derived from auxiliary windings across 36-75 V input variations. Compared to hard-switched alternatives, the L6591TR reduces input filter size and meets ETSI EN 300 132-2 telecom EMC standards with margin.
Empfohlen
Industrial AC-DC Adapter (100-180 W)
The L6591TR serves industrial AC-DC adapters in the 100-180 W range, where the on-board HV start-up and latched OLP simplify safety compliance with IEC 61010-1 for industrial control equipment. The programmable deadtime enables optimization across the 100-300 kHz operating range, accommodating different resonant-tank designs without controller changes. With operating junction temperature to 150 C, the L6591TR tolerates the elevated ambient temperatures found in factory-floor enclosures. Compared to quasi-resonant flyback controllers, the L6591TR's half-bridge topology halves the primary-side switch voltage stress, enabling use of 500-600 V MOSFETs instead of 800-900 V devices.
Empfohlen
Audio Amplifier SMPS (100-300 W)
The L6591TR suits Class-D audio amplifier power supplies where low EMI is critical to avoid coupling switching noise into the audio band. The ZVS operation reduces dV/dt by 5-10x versus hard-switched topologies, easing EMI filtering and meeting FCC Part 15 / EN 55022 Class B with a smaller common-mode choke. Operating from a +/- 50 V to +/- 80 V dual rail, the L6591TR drives a half-bridge that feeds an isolation transformer and full-wave rectifier to generate the amplifier rails. The pulse-by-pulse OCP protects against inrush when amplifiers are switched from standby to full power.
Empfohlen
LED Backlight Driver / Industrial LED Power Supply
The L6591TR fits 100-200 W LED backlight drivers and industrial LED power supplies where constant-current output is required and efficiency above 90% is mandated. Operating the L6591TR at 150-300 kHz with a resonant LLC tank, designers achieve ZVS switching that keeps MOSFET losses low and enables fan-less operation. The advanced light-load management reduces standby consumption for dimmed-display states. Compared to single-switch flyback converters, the L6591TR's half-bridge topology halves transformer primary turns, easing magnetics winding and reducing leakage inductance.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für L6591TR – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | L6591 | L6591D | L6591N | NCP1396AADR2G | NCP1336ADR2G |
|---|---|---|---|---|---|---|
| Package | 16-SOIC | 16-SOIC - same | 16-SOIC - same | 16-SO - same footprint | 16-SOIC - same | 16-SOIC - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | onsemi | onsemi |
| Topology | ZVS Half-Bridge | ZVS Half-Bridge - same | ZVS Half-Bridge - same | ZVS Half-Bridge - same | ZVS Half-Bridge - same | Quasi-Resonant (valley-switching) |
| Max Switching Frequency | 500 kHz | 500 kHz | 500 kHz | 500 kHz | 500 kHz | 500 kHz |
| VCC Operating Range | 8.7 V to 22 V | 8.7 V to 22 V | 8.7 V to 22 V | 8.7 V to 22 V | 9 V to 18 V (narrower) | 9 V to 18 V |
| On-board HV Start-up | Yes (up to 500 V) | Yes - same | Yes - same | Yes - same | Yes | Yes |
| Light-Load Management | Yes (advanced) | Yes - same | Yes - same | Yes - same | Yes | Yes |
| Packaging Format | Tape & Reel (TR) | Tube | Tube (dry-pack) | Tube | Tape & Reel | Tape & Reel |
Wichtigste Unterscheidungsmerkmale
- On-board 500 V high-voltage start-up (vs. Hard-switched half-bridge controllers without HV start-up)
- Advanced light-load management for standby compliance (vs. Basic ZVS half-bridge controllers without light-load optimization)
- Pin-compatible same-brand family members available (vs. Cross-brand alternatives like NCP1396AADR2G)
Designhinweise
The L6591TR requires the DT (deadtime) resistor to be sized correctly: too short causes shoot-through and MOSFET failure; too long causes body-diode conduction and efficiency loss. For 200 kHz operation with 500 V MOSFETs, start with a 33 kohm DT resistor and tune on the bench by monitoring the LVG/HVG crossover waveform. Always verify the bootstrap capacitor (typically 100 nF ceramic) charges fully each cycle - insufficient bootstrap capacitance is the #1 cause of high-side MOSFET failure in half-bridge designs.
Estimated: at 200 kHz switching and 100 mA gate-drive current per transition, gate-drive losses alone are approximately 2 x 100 mA x 15 V x 2 x 200e3 = 0.6 W. Add to this 50 mA quiescent current at 15 V (0.75 W) for a total of ~1.35 W dissipation in the 16-SOIC package. With theta-JA of approximately 120 C/W on a 1 sq-inch copper pour, junction temperature rises ~160 C above 25 C ambient. For continuous full-load operation, expand the copper pour to 2 sq-inch or use thermal vias to an internal plane.
Place the L6591TR's VCC decoupling capacitor (1 uF ceramic + 10 uF electrolytic) within 5 mm of pin 8. The high-voltage start-up pin (HV, pin 11) traces must be routed away from the LVG output (pin 7) to prevent dv/dt-induced coupling; a 4 mm clearance is recommended. The current-sense input (CS, pin 3) is sensitive to leading-edge spikes - keep the CS trace short and use a 100 ohm source resistor plus a 1 nF RC filter to suppress the turn-on spike from the resonant tank.
Compliance-Informationen
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified - industrial/commercial grade. MSL 1 (unlimited floor life).
