MC33262PG - CRM PFC Controller, 12-28V | onsemi
MPN: MC33262PG ✗ End of Life| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
MC33262PG Overview
A PFC controller is a power-management IC that shapes the input current drawn from an AC source so that current and voltage are more nearly in phase. The MC33262 family places this function in a boost-converter control block placed ahead of a downstream rectifier and regulator. Improving power factor reduces reactive current and can reduce input-current stress, while critical-conduction mode supports controlled operation around the inductor-current transition. The controller is therefore positioned within the hierarchy AC input conversion, power factor correction, boost preconverter, power management IC, and semiconductor.
Key verified attributes include an internal startup timer for standalone operation, a one-quadrant multiplier for near-unity power factor, and a zero-current detector for critical-conduction operation. The MC33262PG family is intended for electronic-ballast and off-line power-converter applications. Its 12 V to 28 V operating supply range is suited to rectified auxiliary buses commonly found in such equipment, while the 50 kHz nominal operating point places it in a useful control range for compact boost stages.
The controller architecture supports independent sensing of the input and output voltage conditions through its externally connected pins. Designers must still provide the boost-inductor, switching transistor, rectifier, sensing network, timing components, and output-discharge provisions appropriate to the target converter. The zero-current detector and critical-conduction control reduce the risk of uncontrolled switch conduction, but component tolerances, propagation delays, and magnetic design remain important to stable power-factor correction.
Typical applications include electronic ballasts, off-line AC-DC converters, switched-mode power supplies with active PFC, and industrial power systems that need reduced input-current distortion. The 8-PDIP package is through-hole and is mechanically convenient for leaded assemblies, repair products, and prototypes. It is not the same as an SOIC-8 package, so PCB or lead-frame substitution must be checked before reuse.
For a new design, select the MOSFET, inductor, current-sense resistor, and optical or display feedback components against the required output power and voltage. Confirm the controller's 12 V minimum operating supply, 28 V maximum stated range, and the designer's surge requirements under worst-case mains conditions. Because the verified excerpt does not provide complete maximum ratings, timing values, protection thresholds, or thermal limits, consult the manufacturer datasheet before release to production.
This page combines verified distributor identification, official family information, application context, packaging guidance, and a conservative replacement framework. It distinguishes confirmed MC33262PG attributes from parameters that still require full datasheet review, helping engineers identify the correct power factor controller without conflating it with unrelated MC33269 regulator data.
Drop-in alternatives for MC33262PG — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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Request AlternativesMC33262PG Maximum Ratings & Electrical Characteristics
| Product Type | Power Factor Correction Controller |
| Control Mode | Critical Conduction Mode (CRM) |
| Supply Voltage Range | 12 V to 28 V |
| Supply Current | 6.5 mA |
| Nominal Switching Frequency | 50 kHz |
| Overvoltage Protection | 12 V lockout |
| Package | 8-PDIP |
| Pin Count | 8 pins |
| Mounting Type | Through-hole |
| Primary Function | PFC boost preconverter control |
| Converter Topology | Boost preconverter |
| Startup Feature | Internal startup timer |
| Multiplier Type | One-quadrant multiplier |
| Current Detection | Zero-current detector |
| Target Power Factor | Near-unity power factor |
| Application Category | Electronic ballast and off-line power converter |
MC33262PG 8-pdip Pin Configuration Guide
Pin configuration for MC33262PG (8-pdip package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for MC33262PG.
Refer to the datasheet for full pin configuration.
Typical Applications
MC33262PG is suitable for 6 applications: Electronic Ballast PFC Preconverter, Off-Line AC-DC Power Supply, Industrial AC Power Front End, Switched-Mode Power Supply Front End, High-Power Rectified Input Module, Mains-Powered LED or Motor Driver Supply.
Electronic Ballast PFC Preconverter
The MC33262PG fits an electronic-ballast input stage where active PFC is required ahead of the lamp-output converter. Its critical-conduction-mode control, zero-current detector, and near-unity power-factor objective help reduce the distortion and reactive current associated with driving a fluorescent or discharge-lamp ballast from rectified AC. The 12 V to 28 V supply range and 50 kHz nominal operating point provide the controller environment, while the boost inductor and switching transistor must be sized for the ballast's actual power and surge requirements.
Recommended
Off-Line AC-DC Power Supply
Use MC33262PG in the boost-preconverter section of an off-line power supply that needs improved input-current shape before a downstream rectifier and regulator. The one-quadrant multiplier supports near-unity power-factor correction, while the zero-current detector supports critical-conduction operation. The controller's internal startup timer is useful for a standalone front end, but the final design still requires a rectified-bus startup path, current-sense network, protection scheme, and magnetics validated across line variation.
Recommended
Industrial AC Power Front End
MC33262PG is suitable for an industrial power conversion module in which reduced input-current distortion and PFC are valuable. Its CRM architecture is intended for boost preconverter service, and the 6.5 mA controller supply current helps define the auxiliary power budget. The design must account for industrial input transients, surge requirements, component tolerances, and thermal conditions; those protections are application-level tasks and are not fully specified by the verified distributor snippets.
Recommended
Switched-Mode Power Supply Front End
The MC33262PG can serve as the PFC controller for a switched-mode supply that feeds a regulated DC bus. By commanding the boost switch in critical-conduction mode, it aims to draw line current closer to the shape of the rectified input voltage. The zero-current detector is central to that operating strategy, while the internal startup timer supports stand-alone startup. A practical implementation must verify loop stability, minimum conduction behavior, overvoltage response, and switch-node layout in the complete reference design.
Recommended
High-Power Rectified Input Module
For a module that accepts a rectified high-voltage bus and needs a cleaner input-current profile, MC33262PG provides the controller functions for a critical-conduction boost stage. The 12 V minimum operating supply and 28 V maximum stated range refer to the controller supply requirement, not necessarily to the boosted power output. Keep those rails separate in the system architecture and design the high-voltage switch, rectifier, inductor, and safety network for the actual bus and power level.
Recommended
Mains-Powered LED or Motor Driver Supply
MC33262PG may be used ahead of a mains-derived LED or motor-driver power stage when an active PFC front end is required. The controller's CRM operation and near-unity power-factor objective are useful for meeting input-current and efficiency goals, while the 8-PDIP package is convenient for through-hole power modules. The downstream converter must still regulate the required LED or motor voltage and current, and the complete system must meet its applicable safety and EMC requirements.
Recommended
Engineering reference data for MC33262PG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Product Type | Power Factor Correction Controller |
| Control Mode | Critical Conduction Mode (CRM) |
| Supply Voltage Range | 12 V to 28 V |
| Supply Current | 6.5 mA |
| Nominal Frequency | 50 kHz |
| Overvoltage Protection | 12 V lockout |
| Startup Feature | Internal startup timer |
| Package | 8-PDIP |
| Brand | onsemi |
Key Differentiators
- Purpose-built critical-conduction PFC control (vs MC33269-family regulator)
- Verified 50 kHz control environment (vs Generic PWM controller)
- Stand-alone startup support (vs Controller requiring external startup timer)
Design Notes
Treat the 12 V to 28 V range as the controller supply requirement and keep it distinct from the high-voltage boost output. Provide a startup and auxiliary supply that meets the MC33262PG's operating limits throughout mains variation and startup. Confirm the exact undervoltage, overvoltage, and absolute maximum values from the complete manufacturer datasheet before selecting the auxiliary regulator or protection components.
Place the current-sense and zero-current-detection paths close to the controller and power-stage connections, and keep high-current switching loops compact. Route the boost switch, rectifier, and inductor as a low-inductance power loop, while separating sensitive feedback and current-sense traces. A PCB layout review should check that the selected 8-PDIP footprint matches the verified distributor package and that the exact pin functions are confirmed from the datasheet.
Do not confuse MC33262PG with MC33269-family low-dropout regulators; the numbers are similar, but the verified function is PFC control. Also resolve the secondary listing conflict that calls the part SOIC-8. The distributor record identifies 8-PDIP, so verify mechanical dimensions, lead pitch, pin numbering, and pinout before treating any substitute as a drop-in replacement.
Compliance Information
Compliance status was not included in the verified web data and must be confirmed from current onsemi documentation or the manufacturer.
