Overview
The MC33262DR2 is an active power factor correction controller produced by onsemi. It is specifically designed for use as a preconverter in electronic ballast and off-line power converter applications. This integrated circuit features several key components, including an internal startup timer, a one quadrant multiplier for near unity power factor, a zero current detector for critical conduction operation, a transconductance error amplifier, and a quickstart circuit for enhanced startup. The device also includes a trimmed internal bandgap reference and a totem pole output suitable for driving a power MOSFET.
The MC33262DR2 is part of the MC33262 series, which supersedes the functionality of older devices like the SG3561 and TDA4817. It is available in various package types, including SOIC-8 and PDIP-8, and is known for its low startup and operating current.
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 |
| Input Undervoltage Lockout Startup Threshold | Vth(on) | 11.5 | 13 | 14.5 | V |
| Minimum Operating Voltage After Turn-On | VShutdown | 7.0 | 8.0 | 9.0 | V |
| Operating Ambient Temperature | TA | -40 | - | 105 | °C |
| Power Supply Current (Startup) | ICC | - | - | 0.25 | mA |
| Power Supply Current (Operating) | ICC | - | - | 6.5 | mA |
| Drive Output High State Voltage | VOH | 5.8 | - | 6.4 | V |
| Drive Output Low State Voltage | VOL | 1.7 | - | 2.4 | V |
Key Features
- Active Power Factor Control: Ensures near unity power factor, keeping the AC line current sinusoidal and in phase with the line voltage.
- Internal Startup Timer: Allows for stand-alone applications.
- One Quadrant Multiplier: Enhances power factor correction.
- Zero Current Detector: Ensures critical conduction operation.
- Transconductance Error Amplifier: Provides precise voltage regulation.
- Quickstart Circuit: Enhances startup performance.
- Trimmed Internal Bandgap Reference: Offers a stable reference voltage.
- Totem Pole Output: Ideal for driving a power MOSFET with high state clamp for gate protection.
- Protective Features: Includes overvoltage comparator, input undervoltage lockout with hysteresis, cycle-by-cycle current limiting, and multiplier output clamp.
- Low Startup and Operating Current: Minimizes power consumption.
Applications
- Electronic Ballast: Used in lighting systems to improve power factor and efficiency.
- Off-Line Power Converters: Suitable for various off-line power converter applications requiring high power factor correction.
- Power Supplies: Enhances the power factor in power supply systems, ensuring compliance with regulatory standards.
Q & A
- What is the primary function of the MC33262DR2?
The MC33262DR2 is an active power factor correction controller designed to improve the power factor in electronic ballast and off-line power converter applications.
- What package types are available for the MC33262DR2?
The MC33262DR2 is available in SOIC-8 and PDIP-8 package types.
- What is the operating ambient temperature range for the MC33262DR2?
The operating ambient temperature range is from -40°C to +105°C.
- What protective features does the MC33262DR2 include?
The device includes an overvoltage comparator, input undervoltage lockout with hysteresis, cycle-by-cycle current limiting, multiplier output clamp, and a drive output high state clamp for MOSFET gate protection.
- How does the zero current detector function in the MC33262DR2?
The zero current detector ensures critical conduction operation by initiating the next on-time when the inductor current reaches zero.
- What is the purpose of the one quadrant multiplier in the MC33262DR2?
The one quadrant multiplier enhances power factor correction by ensuring near unity power factor.
- What is the typical power supply current during startup and operation for the MC33262DR2?
The typical power supply current during startup is 0.25 mA, and during operation, it is 6.5 mA.
- How does the quickstart circuit enhance the startup performance of the MC33262DR2?
The quickstart circuit helps in faster startup by reducing the initial startup time.
- What is the significance of the trimmed internal bandgap reference in the MC33262DR2?
The trimmed internal bandgap reference provides a stable and accurate voltage reference for the device.
- What are the typical drive output high and low state voltages for the MC33262DR2?
The typical drive output high state voltage is between 5.8V and 6.4V, and the low state voltage is between 1.7V and 2.4V.
