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Description
Power Factor Correction PFC and PWM Controller Combo
Package: SOIC
No of Pins: 16
Container: Rail
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The parameters and performance indicators of this product are sourced from the internet. In case of discrepancies, please refer to the manufacturer's technical specifications!！
General Description
The ML4800 is a controller for power factor corrected, switched mode power supplies. Power Factor Correction (PFC) allows the use of smaller, lower cost bulk capacitors, reduces power line loading and stress on the switching FETs, and results in a power supply that fully complies with IEC1000-3-2 specification. Intended as a BiCMOS version of the industry-standard ML4824, the ML4800 includes circuits for the implementation of leading edge, average current, “boost” type power factor correction and a trailing edge, pulse width modulator (PWM). It also includes a TriFault Detect? function to help ensure that no unsafe conditions will result from single component failure in the PFC. Gate-drivers with 1A capabilities minimize the need for external driver circuits. Low power requirements improve efficiency and reduce component costs.
An over-voltage comparator shuts down the PFC section in the event of a sudden decrease in load. The PFC section also includes peak current limiting and input voltage brownout protection. The PWM section can be operated in current or voltage mode, at up to 250kHz, and includes an accurate 50% duty cycle limit to prevent transformer saturation.
Features
● Internally synchronized leading-edge PFC and trailing-edge PWM in one IC
● TriFault DetectTM for UL1950 compliance and enhanced safety
● Slew rate enhanced transconductance error amplifier for ultra-fast PFC response
● Low power: 200μA startup current, 5.5mA operating current
● Low total harmonic distortion, high PF
● Reduced ripple current in storage capacitor between PFC and PWM sections
● Average current, continuous boost leading edge PFC
● PWM configurable for current-mode or voltage mode operation
● Current fed gain modulator for improved noise immunity
● Over voltage and brown-out protection, UVLO, and soft start
Preview of the first 3 pages of the data sheet
| QUANTITY | UNIT PRICE | PLUS UNIT PRICE | TOTAL PRICE |
|---|---|---|---|
| ≥1: | US $1.09120 | US $0.98208 | US $0.98208 |
| ≥5: | US $0.81840 | US $0.73656 | US $3.68280 |
| ≥10: | US $0.49104 | US $0.44194 | US $4.41940 |
| ≥20: | US $0.47740 | US $0.42966 | US $8.59320 |
| ≥50: | US $0.46376 | US $0.41738 | US $20.86900 |
| ≥100: | US $0.45012 | US $0.40511 | US $40.51100 |
| ≥200: | US $0.43648 | US $0.39283 | US $78.56600 |
| ≥500: | US $0.43102 | US $0.38792 | US $193.96000 |
| ≥1000: | US $0.42284 | US $0.38056 | US $380.56000 |
Substitute (equivalent) Product
| Substitute Product | Description |
|---|---|
| UC3846AN | UC3846AN is a SL4PWM current mode pulse width modulation (PWM) controller for general-purpose power management needs. |
| L4970A | L4970A is a switch-mode power supply module (SMPS) control IC for providing high-efficiency power conversion. |
| SG3526N | SG3526N is a pulse width modulation (PWM) controller IC designed for switched-mode power supply and DC-DC converter applications. |
| TL494CN | TL494CN is a PWM control circuit for driving DC-DC converters and switch-mode power supplies (SMPS). |
| KA7500B | KA7500B is a pulse width modulation (PWM) control circuit used in power supplies and DC-DC converters for efficient power regulation. |
Product Usage
The ML4800CS is an integrated circuit designed for use in power supply control applications, particularly those requiring power-factor correction (PFC) and pulse-width modulation (PWM) functionality. It is commonly found in circuits where both PFC and PWM control are important to achieve high efficiency and compliance with international power quality standards.
Here are some typical applications and circuits where the ML4800CS might be used:
Switch-Mode Power Supplies (SMPS): The IC is used to improve efficiency and power factor in high-density power supply designs such as those found in computers, monitors, and consumer electronics.
Power Factor Correction Circuits: The ML4800CS is specifically designed for active power factor correction, which improves the power factor of power supplies operating from AC mains. This is critical in applications where regulatory requirements or efficiency goals necessitate near-unity power factor.
UPS Systems (Uninterruptible Power Supplies): They ensure a continuous supply of power and usually incorporate PFC to minimize losses and improve efficiency.
Battery Chargers: For applications requiring efficient battery charging from an AC source, the PFC and PWM combination helps in maintaining high efficiency and better regulation.
LED Drivers: High-efficiency LED drivers may use the PFC feature of the ML4800CS to comply with lighting standards and achieve higher energy efficiency.
Industrial Power Supplies: In industrial settings where power quality and efficiency are critical, especially under varying loads, the ML4800CS offers a good solution.
A typical circuit using the ML4800CS might include:
AC Mains Input:
PFC Stage:
DC Output Regulation:
Control Circuitry:
By integrating both PFC and PWM functionalities into a single chip, the ML4800CS simplifies the design and enhances the performance of power supply circuits, making it highly valuable in the aforementioned applications.
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| Express | Standard Shipping | Express (0.5kg) | Standard Shipping (0.05kg) | ||
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All UTSOURCE purchases have a 90 days money back return policy, plus a 100 days UTSOURCE warranty against any manufacturing defects.This warranty shall not apply to any item where defects have been caused by improper customer assembly, failure by customer to follow instructions, product modification, negligent or improper operation.
ML4800CS
ML4800CS has several brands around the world that may have alternate names for ML4800CS due to regional differences or acquisition. ML4800CS may also be known as the following names:
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