ISL6754AAZ - ZVS Full-Bridge PWM Controller IC | Renesas
Teilenummer: ISL6754AAZ ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $4.95 | $4,95 |
| 10 | $4.45 | $44,50 |
| 100 | $3.95 | $395,00 |
| 500 | $3.55 | $1.775,00 |
| 1.000 | $3.15 | $3.150,00 |
ISL6754AAZ Übersicht
A Zero-Voltage Switching (ZVS) full-bridge PWM controller is a current-mode or voltage-mode power-supply controller IC that orchestrates four primary-side MOSFETs in an H-bridge topology driving the primary winding of an isolating transformer. ZVS timing aligns each MOSFET's turn-on transition with the zero-crossing of the transformer's drain-to-source voltage, removing the capacitive charge loss and EMI spike that hard-switched bridge converters produce. The ISL6754AAZ sits inside the broader PWM controller -> switching controller -> power management IC taxonomy and targets isolated DC-DC converters in the 100 W to several-kW range.
Key features include a fixed 50% duty cycle on the upper bridge FETs, trailing-edge modulation on the lower bridge FETs for output regulation, an adjustable dead-time / resonant-switching delay, average current-mode control with an external current-sense input, synchronous rectifier output drive with adjustable lead/lag timing, and an internal transconductance error amplifier referenced to a 0.6 V bandgap. The QSOP-16 footprint and 9 V to 20 V VDD range make it suitable for telecom, server, and industrial brick-converter modules.
Architecturally the ISL6754AAZ combines a fixed-frequency oscillator (set by RTD and CT), a sawtooth ramp generator, two PWM comparators for the bridge outputs, an SR timing block, and a soft-start / fault manager. Average current-mode control is implemented by feeding the external current-sense signal through the transconductance amplifier, then comparing it to the internal ramp, which yields input-voltage feed-forward and cycle-by-cycle current limiting without the slope-compensation burden of peak-current-mode controllers.
Typical applications include 48 V-input telecom isolated DC-DC modules (often full-bridge + synchronous rectifier), server and data-center intermediate bus converters, industrial programmable logic controller (PLC) power supplies, and high-end audio amplifier SMPS rails. In each case the ZVS capability cuts switching losses enough to allow higher switching frequencies (typically 200 kHz to 1 MHz) without forcing a heatsink redesign.
When designing with the ISL6754AAZ, the user must program RTD and CT for the desired switching frequency, set RDLY for the resonant-switching delay (typically 50 ns to 200 ns), and choose the SR timing resistors so that the synchronous rectifiers turn on slightly after the bridge MOSFETs and turn off slightly before them, preventing shoot-through and body-diode conduction.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet narrative, helping engineers compare the ISL6754AAZ against same-family and competitor controllers on a parameter-by-parameter basis.
Drop-in-Alternativen für ISL6754AAZ – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
ISL6754AAZA
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ISL6752
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ISL6754AAZ Grenzwerte & elektrische Eigenschaften
| Topologie | ZVS Full-Bridge PWM Controller |
| Control Mode | Average current-mode with peak current limit |
| Input Voltage (VDD) | 9 V to 20 V |
| Upper FET Drive | Fixed 50% duty cycle |
| Lower FET Drive | Trailing-edge modulated (PWM) |
| Resonant Switching Delay | Adjustable (RDLY pin) |
| Synchronous Rectifier Drive | Yes, with adjustable lead/lag timing |
| Internal Reference Voltage | 0.6 V (typical) |
| Error Amplifier | Internal transconductance (OTA) |
| Sanftanlauf | Yes (SS pin) |
| Betriebstemperaturbereich | -40 C to +105 C |
| Gehäuse | 16-pin QSOP |
| Montageart | Surface Mount |
ISL6754AAZ 16-pin qsop Pinbelegungsleitfaden
Pinbelegung für ISL6754AAZ (16-pin qsop-Gehäuse). Dieses Leistungsbauteil verfügt über Gate-, Drain- und Source-Anschlüsse. Bei nicht gepolten Gehäusen entnehmen Sie die genaue Ausrichtung von Pin 1 und Footprint-Details dem Herstellerdatenblatt. Typische Anwendungen sind Netzteilentwurf, Motoransteuerung und Lastschaltung.
Keine detaillierten Pinbelegungsdaten verfügbar für ISL6754AAZ.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
ISL6754AAZ ist geeignet für 6 Anwendungs: 48 V Telecom Isolated DC-DC Module, Server Intermediate Bus Converter (IBC), Industrial PLC Power Supply, High-End Audio Amplifier SMPS Rail, Battery Charger Front-End DC-DC Stage, Solar Inverter Auxiliary Power Supply.
48 V Telecom Isolated DC-DC Module
The ISL6754AAZ's 9 V to 20 V VDD supply range and 0.6 V internal reference make it ideal for 48 V-input telecom bricks where efficiency at 200 kHz to 500 kHz switching frequencies is mandatory. Average current-mode control provides cycle-by-cycle current limiting and inherent input-voltage feed-forward, which keeps the converter stable across the wide 36 V to 75 V telecom bus range after front-end conversion. The adjustable resonant-switching delay via the RDLY pin lets the designer tune ZVS transitions to the transformer's leakage inductance, eliminating turn-on losses on the primary-side MOSFETs and enabling >94% efficiency at full load.
Empfohlen
Server Intermediate Bus Converter (IBC)
Data-center intermediate bus converters need 48 V to 12 V or 5 V conversion at 500 W to 2 kW with minimal cooling overhead, and the ISL6754AAZ's ZVS full-bridge topology with synchronous-rectifier drive is well matched to this requirement. The internal transconductance error amplifier referenced to 0.6 V supports standard secondary-side current-sense signaling through an optocoupler, while the synchronous-rectifier output with adjustable lead and lag timing prevents shoot-through and minimizes body-diode conduction. Operating at 200 kHz to 400 kHz, designers can shrink the isolation transformer and output inductor substantially compared with hard-switched bridge converters, freeing PCB real estate on the server motherboard.
Empfohlen
Industrial PLC Power Supply
Industrial PLC power supplies require robust isolated DC-DC conversion from 24 V or 48 V industrial bus rails to internal logic rails such as 5 V, 3.3 V, and 1.8 V at 100 W to 500 W. The ISL6754AAZ supports this operating envelope with its -40 C to +105 C industrial temperature range and ZVS switching, which reduces EMI emissions that could otherwise disrupt analog input modules. The integrated soft-start and cycle-by-cycle current limit provide the safety features required by industrial safety standards, while the synchronous-rectifier drive improves light-load efficiency - critical for energy-conscious factory automation applications.
Empfohlen
High-End Audio Amplifier SMPS Rail
High-end Class-D audio amplifiers demand very clean, low-noise DC rails to maximize dynamic range and signal-to-noise ratio. Placing the ISL6754AAZ in a ZVS full-bridge topology driving an isolated +/-25 V or +/-50 V secondary rail produces a clean, low-ripple supply for the amplifier's output stage, since ZVS switching eliminates the high-frequency noise spikes typical of hard-switched converters. The synchronous-rectifier drive output supports high-efficiency rectification on the secondary side, minimizing heatsinking, and the adjustable resonant-switching delay allows the designer to tune the ZVS transition to the specific transformer used in the audio supply.
Empfohlen
Battery Charger Front-End DC-DC Stage
Industrial battery chargers for forklifts, e-mobility, and backup power systems need an isolated front-end DC-DC stage that accepts a wide input range and produces a regulated DC bus for the charger downstream. The ISL6754AAZ's average current-mode control and cycle-by-cycle current limiting provide the precise current regulation required for battery charging profiles, while its ZVS capability allows operation at higher switching frequencies without efficiency penalties. The QSOP-16 footprint is small enough to fit within a sealed IP65 charger enclosure, and the -40 C to +105 C temperature range covers the harsh operating environment typical of these applications.
Empfohlen
Solar Inverter Auxiliary Power Supply
Solar inverters require an internal auxiliary power supply to power their control electronics, gate drivers, and communication interfaces, typically isolated from the high-voltage DC bus. The ISL6754AAZ supports this function with its 9 V to 20 V VDD supply range (compatible with a 12 V auxiliary rail) and its ZVS full-bridge topology, which delivers high efficiency and low EMI - critical in a solar inverter where any auxiliary supply noise could couple back into the power-conversion stage. The synchronous-rectifier drive and average current-mode control support a compact, efficient isolated DC-DC module sized to fit inside the inverter enclosure.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für ISL6754AAZ – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | ISL6754AAZA | ISL6752 |
|---|---|---|---|
| Brand | Renesas Electronics (formerly Intersil) | Renesas Electronics | Renesas Electronics |
| Package | 16-pin QSOP | 16-pin QSOP - same | 16-pin QSOP - same |
| Topology | ZVS Full-Bridge | ZVS Full-Bridge | ZVS Full-Bridge |
| Control Mode | Average current-mode | Average current-mode | Voltage-mode |
| VDD Supply Range | 9 V to 20 V | 9 V to 20 V | 9 V to 20 V |
| Synchronous Rectifier Drive | Yes, with adjustable lead/lag timing | Yes, with adjustable lead/lag timing | No |
| Resonant Switching Delay | Adjustable via RDLY pin | Adjustable via RDLY pin | Fixed |
| Operating Temperature | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C |
Wichtigste Unterscheidungsmerkmale
- Average current-mode control integrated on-chip (vs. ISL6752)
- Adjustable synchronous-rectifier drive with lead/lag timing (vs. ISL6752)
- Adjustable resonant-switching delay (RDLY pin) (vs. ISL6752)
Designhinweise
The QSOP-16 package places the high-current switching nodes (HB, HO, HS, LO, VSNS) and sensitive analog signals (RTD, CT, SS, RDLY, REF) on the same physical die. Estimated: keep the loop area between the bridge FETs and the bootstrap capacitor to less than 1 square centimeter to limit ringing on the HO output. Place the RTD and CT timing components close to their respective pins with a ground return that does not share the gate-drive return path, since the switching currents would otherwise inject noise into the timing circuit and cause frequency jitter.
Setting RDLY too short can leave insufficient dead time, causing cross-conduction (shoot-through) between the upper and lower MOSFETs of one bridge leg and potentially destroying the bridge in microseconds. Estimated: begin with RDLY = 100 ns and increase if the upper MOSFET shows hard-switching on its drain waveform. Conversely, setting RDLY too long increases body-diode conduction losses in the bridge. Use an oscilloscope to monitor the drain-to-source voltage of one upper MOSFET and tune RDLY so that the VDS transition crosses zero before the gate is driven high.
Although the QSOP-16 package is small, the ISL6754AAZ's quiescent current draw under switching conditions is around 20 mA to 25 mA, which translates to roughly 240 mW to 500 mW of dissipation at VDD = 20 V. Estimated: at VDD = 15 V the dissipation drops to about 300 mW. The QSOP-16 has a typical theta_JA around 100 C/W on a 4-layer 1 oz PCB, so the junction temperature rise above ambient stays below 50 C in most designs. If the application operates in an enclosed environment with limited airflow, consider adding a copper pour under the exposed pad (when present) or accept a higher junction temperature by derating accordingly.
Compliance-Informationen
Compliance information was not provided in the verified web data. Refer to the official Renesas product page (https://www.renesas.com/en/document/dst/isl6754-datasheet) for the latest compliance declarations.
