Overview
The MC33262CDR2G is an active power factor controller integrated circuit designed by Onsemi. It is specifically tailored for use as a preconverter in electronic ballast and off-line power converter applications. This device is part of the MC33262 series, which includes several protective and functional features to enhance power factor correction and ensure efficient operation.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Total Power Supply and Zener Current | ICC + IZ | - | - | 30 | mA |
| Output Current, Source or Sink | IO | - | - | 500 | mA |
| Current Sense, Multiplier, and Voltage Feedback Inputs | Vin | -1.0 | - | 10 | V |
| Zero Current Detect Input High State Forward Current | Iin | - | - | 50 | mA |
| Input Bias Current (VFB = 0 V) | IIB | -0.1 | -0.5 | - | μA |
| Transconductance (TA = 25°C) | gm | 80 | 100 | 130 | μmho |
| Output Voltage Swing High State (VFB = 2.3 V) | VOH(ea) | 5.8 | - | 6.4 | V |
| Output Voltage Swing Low State (VFB = 2.7 V) | VOL(ea) | 1.7 | - | 2.4 | V |
| Overvoltage Comparator Threshold | VFB(OV) | 1.065 VFB | 1.08 VFB | 1.095 VFB | - |
| Startup Threshold (VCC Increasing) | Vth(on) | 11.5 | 13 | 14.5 | V |
| Minimum Operating Voltage After Turn-On (VCC Decreasing) | VShutdown | 7.0 | 8.0 | 9.0 | V |
| Operating Temperature Range | TA | -40 | - | 105 | °C |
Key Features
- Internal Startup Timer: For stand-alone applications.
- One Quadrant Multiplier: Enables near unity power factor.
- Zero Current Detector: Ensures critical conduction operation.
- Transconductance Error Amplifier: High output impedance with controlled voltage-to-current gain.
- Quickstart Circuit: Enhances startup performance.
- Trimmed Internal Bandgap Reference: Provides a stable reference voltage.
- Current Sensing Comparator: Monitors and controls the current sense threshold.
- Totem Pole Output: Ideally suited for driving a power MOSFET with high state clamp for gate protection.
- Protective Features: Overvoltage comparator, input undervoltage lockout with hysteresis, cycle-by-cycle current limiting, multiplier output clamp, and RS latch for single pulse metering.
Applications
The MC33262CDR2G is designed for use in various applications, including:
- Electronic Ballast: Enhances power factor correction in lighting systems.
- Off-line Power Converters: Improves power factor in AC-DC converters.
- Active Power Factor Correction (PFC) Preconverters: Ensures the AC line current is sinusoidal and in phase with the line voltage.
Q & A
- What is the primary function of the MC33262CDR2G?
The MC33262CDR2G is an active power factor controller designed to improve power factor in off-line power converter applications.
- What are the key features of the MC33262CDR2G?
Key features include an internal startup timer, one quadrant multiplier, zero current detector, transconductance error amplifier, quickstart circuit, and protective features like overvoltage comparator and undervoltage lockout.
- What is the operating temperature range of the MC33262CDR2G?
The operating temperature range is from -40°C to 105°C.
- What type of output does the MC33262CDR2G have?
The device has a totem pole output, which is ideal for driving a power MOSFET.
- What is the purpose of the zero current detector in the MC33262CDR2G?
The zero current detector ensures critical conduction operation by initiating the next on-time when the inductor current reaches zero.
- How does the overvoltage comparator protect the device?
The overvoltage comparator eliminates runaway output voltage due to load removal by turning off the output when the voltage exceeds a certain threshold.
- What is the minimum operating voltage after turn-on for the MC33262CDR2G?
The minimum operating voltage after turn-on is between 7.0 V and 9.0 V.
- What is the typical transconductance of the error amplifier?
The typical transconductance of the error amplifier is 100 μmhos.
- What type of package is the MC33262CDR2G available in?
The device is available in dual-in-line and surface mount plastic packages.
- Is the MC33262CDR2G Pb-free and halide-free?
Yes, the MC33262CDR2G is Pb-free and halide-free.
