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Renesas ISL6730CFUZ-T
- Part No.:
- ISL6730CFUZ-T
- Manufacturer:
- Renesas
- Category:
- PFC (Power Factor Correction)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL6730CFUZ-T.pdf
- Description:
- IC PFC CTRLR CCM 125KHZ 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,836
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Product details
Overview
ISL6730CFUZ-T from Renesas (formerly Intersil) is a continuous conduction mode (CCM) active Power Factor Correction (PFC) controller IC designed for boost-topology AC/DC power supplies up to 2 kW with universal input (85–265 VAC). It operates at 124 kHz, delivers 1.5 A peak gate drive, integrates 5.4 V ±2% internal regulator, and provides cycle-by-cycle overcurrent, overvoltage, brownout, and overtemperature protection. It targets high-efficiency desktop and laptop AC/DC adapters.
For engineers reviewing the ISL6730CFUZ-T datasheet, ISL6730CFUZ-T pinout, ISL6730CFUZ-T application, or ISL6730CFUZ-T equivalent, key selection criteria include its fixed 124 kHz switching frequency, absence of skip mode (unlike ISL6730A/B), 10-lead MSOP package, CCM operation with negative capacitance technology for EMI filter reduction, and full protection suite including BO, OVP, OTP, and average power limiting.
Technical Context
The ISL6730CFUZ-T implements a current-mode CCM PFC control architecture with a patented negative capacitance generator that cancels input filter capacitor effects-reducing zero-crossing distortion and enabling smaller EMI chokes and capacitors. Its multiplier-based analog control loop uses VIN-sensed line voltage and ISEN-sampled inductor current to shape input current waveform.
It features an internally clamped 12.5 V gate driver (1.5 A source / 2 A sink), a transconductance voltage error amplifier (Gmv = 77 µA/V), and a current error amplifier (Gmi = 268 µA/V) with DC gain of 1.9 A/A. Unlike ISL6730A/B, it lacks automatic pulse-skipping light-load mode and relies on FB- or BO-triggered shutdown for low-power states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 124 kHz (fixed, no skip mode)-enables optimized magnetic design for 300W+ universal-input PFC stages. |
| Gate Drive Capability | 1.5 A source / 2 A sink, 12.5 V clamped-directly drives medium-power MOSFETs (e.g., IPP60R600C6) without external buffers. |
| VREG Output | 5.4 V ±2%, 10 mA max-powers internal circuitry and small external bias networks; bypassed with 47 nF low-ESR capacitor. |
| Input Voltage Sensing | VIN pin accepts 0–6.3 V; supports resistor-divider-based line sensing for current shaping and brownout detection via BO pin. |
| Protection Features | Cycle-by-cycle overcurrent (IOC = −177 µA), input brownout (VBO_R = 494 mV), output overvoltage (VOVP = 104.1%), OTP (160°C), and UVLO (10 V ON / 7.5 V OFF). |
| Operating Temperature | −40°C to +125°C junction-validated for industrial and computing power supply environments with high ambient thermal stress. |
| Package | 10-lead MSOP (M10.118), θJA = 136.9°C/W-surface-mount compatible with standard reflow profiles and compact board layouts. |
Pinout & Package
ISL6730CFUZ-T is housed in a 10-lead MSOP package (Pb-free, RoHS-compliant, MSL3 per J-STD-020). The exposed pad is not electrically connected and may be left floating or grounded for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Power and signal reference ground | All internal voltage levels referenced to this node; must be low-impedance connection to PCB ground plane. |
| 2 ISEN | Current sense input | Accepts scaled inductor current signal (−177 µA OC threshold); connects to shunt resistor return path via RSEN network. |
| 3 ICOMP | Current error amplifier output | Drives external compensation network; sets peak inductor current reference; sinks/source up to 60 µA. |
| 4 VIN | Rectified line voltage sense | Inputs semi-sinusoidal waveform for current shaping and negative capacitance generation; max 6.3 V rating. |
| 5 BO | Brownout detection and line compensation | Voltage follower of VIN divider; triggers shutdown below 401 mV; requires ≥0.22 µF ceramic decoupling. |
| 6 COMP | Voltage error amplifier output | Controls average input power level; clamped at 3.85 V for overpower limit; soft-start ramp initiated at 0.64 V. |
| 7 FB | Output voltage feedback | Monitors output via resistor divider; enables OVP at 104.1% of 2.5 V reference; internal 65 nA pull-down for open-loop safety. |
| 8 VREG | Internal 5.4 V regulator output | Provides stable bias for internal blocks; bypass with 47 nF low-ESR capacitor; not intended for external loads. |
| 9 VCC | Main supply input | 15–20 V operating range; UVLO activates at 10 V rising edge; requires ≥0.1 µF ceramic decoupling to GND. |
| 10 GATE | Push-pull MOSFET gate driver | 12.5 V clamped output; 1.5 A source / 2 A sink capability; rise/fall times ≤62 ns into 2.2 nF load. |
Key Features
| Feature | Design Value |
|---|---|
| Negative capacitance generation | Patent-pending circuit cancels EMI filter capacitor phase lead-reduces choke size and eliminates zero-crossing distortion without adding components. |
| Integrated protection suite | Hardware-enforced cycle-by-cycle overcurrent, brownout (BO), overvoltage (FB), overtemperature (OTP), and UVLO-no external supervision IC required. |
| High-accuracy analog control | 2.5 V ±0.5% internal reference, 77 µA/V voltage error amp transconductance, and 268 µA/V current error amp transconductance ensure tight regulation across line/load. |
| Robust gate driver | 12.5 V clamped, 1.5 A source / 2 A sink output with <62 ns switching transitions-drives 600 V MOSFETs directly in 300W+ designs. |
| Universal input support | Validated from 85–265 VAC input with CCM operation-enables single-design adaptability across global mains voltages without firmware or hardware changes. |
Applications
| Desktop Computer AC/DC Adaptor | Laptop Computer AC/DC Adaptor |
|---|---|
Use Scenario: 300W universal-input PFC front-end for ATX PSUs meeting 80 PLUS Gold efficiency requirements. IC Role / Device Role / Timing Role: Primary CCM PFC controller generating precise sinusoidal input current using VIN/ISEN feedback and 124 kHz PWM. Use Value: Enables compliance with EN 61000-3-2 Class D harmonic limits while reducing EMI filter component count by 30% via negative capacitance. |
Use Scenario: 85W compact PFC stage in ultra-thin laptop adapters requiring high power density and low standby loss. IC Role / Device Role / Timing Role: Fixed-frequency (124 kHz) CCM controller managing boost inductor current and output regulation via FB/COMP loop. Use Value: Achieves >92% efficiency at full load and maintains stable regulation down to 10% load without skip mode artifacts or audible noise. |
| TV AC/DC Power Supply | AC/DC Brick Converter |
Use Scenario: 200W PFC section in LED-backlit TV power supplies operating continuously under high ambient temperature. IC Role / Device Role / Timing Role: Thermal-robust PFC controller with 125°C rated junction and integrated OTP shutdown at 160°C. Use Value: Eliminates need for external thermal monitoring; sustains operation in enclosed chassis with minimal derating up to 70°C ambient. |
Use Scenario: Industrial-grade 150W open-frame AC/DC brick supporting wide input range and long service life. IC Role / Device Role / Timing Role: High-reliability PFC controller with cycle-by-cycle current limiting and brownout recovery hysteresis (100 mV). Use Value: Prevents MOSFET failure during line surges and ensures graceful restart after brownout events without latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PFC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28070DWR | Two-phase interleaved CCM controller; 65–300 kHz programmable frequency; no integrated VREG; requires external gate driver. | Targets higher-power (>500W) systems needing lower ripple and thermal spreading; not drop-in compatible due to different topology and pinout. | Select UCC28070DWR only when interleaving is required and board layout allows dual-phase magnetics and external driver integration. |
| FAN4803SJX | Fixed 65 kHz frequency; no negative capacitance; simpler analog control; 1.2 A gate drive; 5.0 V ±3% VREG. | Better suited for cost-sensitive <150W designs where EMI filter size is less critical; lacks BO pin and advanced protection features. | Choose FAN4803SJX for entry-level adapters where ISL6730CFUZ-T's 124 kHz and negative capacitance provide no measurable benefit. |
Compared with UCC28070DWR and FAN4803SJX, the ISL6730CFUZ-T offers superior EMI performance via patented negative capacitance, tighter voltage regulation (±0.5% reference), and higher gate drive strength-making it optimal for space-constrained, high-efficiency 150–300W universal-input PFC stages where component count and thermal margin are critical.
Availability
ISL6730CFUZ-T is available at Aetrix Electronics and suitable for desktop computer AC/DC adaptors, laptop AC/DC adaptors, and TV AC/DC power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for ISL6730CFUZ-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation is a global semiconductor leader delivering trusted embedded design innovation, with origins in Intersil's high-performance analog and power management portfolio.
The ISL6730 family was developed by Intersil specifically for high-efficiency, universal-input CCM PFC applications in computing and consumer power supplies-emphasizing integration, protection robustness, and EMI reduction through analog control innovations.
FAQ
What is the switching frequency of the ISL6730CFUZ-T and is it adjustable?
The ISL6730CFUZ-T operates at a fixed 124 kHz switching frequency across temperature and line voltage. It is not user-adjustable-the frequency is set by internal oscillator design and varies only within ±10% over −40°C to +125°C. This fixed frequency simplifies EMI filter design and avoids audible noise issues common with variable-frequency controllers. The ISL6730CFUZ-T does not support external frequency programming or synchronization inputs.
Does the ISL6730CFUZ-T support light-load efficiency enhancement like skip mode?
No, the ISL6730CFUZ-T does not support skip mode or pulse-skipping light-load efficiency enhancement. Unlike the ISL6730A and ISL6730B variants, the ISL6730CFUZ-T is explicitly configured without this feature per Table 1 in FN8258 Rev 1.00. Light-load efficiency must be managed via system-level techniques such as burst-mode secondary-side control or adaptive PFC disable, triggered by pulling the FB pin below 0.2 V or grounding the BO pin.
What protection features are integrated into the ISL6730CFUZ-T?
The ISL6730CFUZ-T integrates six hardware-based protections: cycle-by-cycle overcurrent (triggered at −177 µA on ISEN), input brownout (shutdown below 401 mV on BO), output overvoltage (disabled when FB exceeds 104.1% of 2.5 V), overtemperature (shuts down at 160°C junction, resumes at 135°C), VCC undervoltage lockout (enables at 10 V, disables at 7.5 V), and average input power limiting (via COMP clamping at 3.85 V).
Can the ISL6730CFUZ-T be used in discontinuous conduction mode (DCM) PFC designs?
No, the ISL6730CFUZ-T is designed exclusively for continuous conduction mode (CCM) operation. Its control architecture-including the current error amplifier, multiplier block, and negative capacitance generator-is optimized for CCM boost topologies. DCM operation is not supported, and attempting to force DCM behavior (e.g., via undersized inductors) will result in unstable regulation, excessive current ripple, and potential protection activation.
What is the purpose of the negative capacitance generation feature in the ISL6730CFUZ-T?
The negative capacitance generation feature in the ISL6730CFUZ-T actively cancels the phase-lead effect of the input EMI filter capacitor (CF2), reducing zero-crossing distortion and improving displacement power factor. This allows relocation of CF2 after the bridge rectifier, enabling smaller, lower-cost capacitors and smaller EMI chokes-verified in typical 300W applications where it reduces total filter volume by ~30% versus conventional designs.
ISL6730CFUZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Mode:
- Continuous Conduction (CCM)
- Frequency - Switching:
- 125kHz
- Current - Startup:
- 106 µA
- Voltage - Supply:
- 15V ~ 20V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
ISL6730CFUZ-T FAQ
1.How can I place an order for ISL6730CFUZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6730CFUZ-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISL6730CFUZ-T reliable?
The price and inventory of ISL6730CFUZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6730CFUZ-T is usually 5 days.
3.What payment methods are accepted for ISL6730CFUZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6730CFUZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6730CFUZ-T?
ISL6730CFUZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6730CFUZ-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISL6730CFUZ-T?
For technical support, including ISL6730CFUZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6730CFUZ-T requirements.
6.How does Aetrix verify that ISL6730CFUZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6730CFUZ-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL6730CFUZ-T meets industry standards.
7.What is the process for return or replacement of ISL6730CFUZ-T?
All ISL6730CFUZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6730CFUZ-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISL6730CFUZ-T part is unused and in its original packaging.
Return procedure for ISL6730CFUZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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