FAN7527B
FAN7527B
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Service & Packaging
Service & Packaging
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FAN7527B DataSheet
Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!
Details
The FAN7527B provides simple and high performance active power factor correction. The FAN7527B is optimized for electronic ballasts and low power and high density power supplies which require minimum board size, reduced external components and low power dissipation. Because the R/C filter is included in the current sense block, the external R/C filter is not necessary. Special circuitry has also been added to prevent no load runaway conditions. Regardless of the supply voltage, the output drive clamping circuit limits the overshoot of the power MOSFET gate drive. It greatly enhances the system reliability.Features • Internal start-up timer • Internal R/C filter eliminates the need for an external R/C filter • Very precise adjustable output over voltage protection • Zero current detector • One quadrant multiplier • Trimmed 1.5% internal band gap reference • Under voltage lockout with 3V of hysteresis • Totem pole output with high state clamp • Low start-up and operating current • 8-Pin DIP or 8-Pin SOPApplications • Electronic ballast •SMPS
Key Features
- Internal start-up timer
- Internal R/C filter eliminates the need for an external R/C filter
- Very precise adjustable output over voltage protection
- Zero current detector
- One quadrant multiplier
- Trimmed 1.5% internal band gap reference
- Under voltage lockout with 3V of hysteresis
- Totem pole output with high state clamp
- Low start-up and operating current
- 8-Pin DIP or 8-Pin SOP
- Applications
- Electronic ballast
- SMPS
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
Manufacturer | Fairchild Semiconductor | Product Category ! | PFC (Power Factor Correction) |
Datasheet PDF
Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.
FAQs
What is FAN7527B?
The FAN7527B is a current mode PWM control IC designed for use in offline flyback converters. It is commonly used in power supply applications for consumer electronics, such as LED lighting, set-top boxes, and auxiliary power supplies.
How Does FAN7527B Work?
The FAN7527B operates by regulating the switching of power transistors in a flyback converter to deliver a stable output voltage. It utilizes current mode control to provide cycle-by-cycle current limiting and adjustable overcurrent protection. The IC also includes features for comprehensive protection and fault detection, ensuring reliable operation in various power supply applications.
How Many Pins does FAN7527B have and What are the Functions of the Pinout Configuration?
The FAN7527B is housed in an 8-pin DIP (Dual Inline Package) or SOIC (Small Outline Integrated Circuit) package. The pinout configuration includes:
- VCC: Power supply pin.
- VREF: Reference voltage pin for current sense comparator.
- CURRENT SENSE: Current sense input pin.
- FB: Feedback input pin for voltage regulation.
- RT/CT: Pin for connecting timing components for the internal oscillator.
- CS: Chip enable pin.
- VCC: Secondary power supply pin for internal control circuitry.
- GND: Ground pin.
What are the Pros and Cons of FAN7527B?
Pros:
- Current Mode Control: Provides cycle-by-cycle current limiting for enhanced overcurrent protection.
- Comprehensive Protection: Includes features for overvoltage protection, overcurrent protection, and fault detection.
- External Component Reduction: Minimizes the number of external components required for power supply design.
- Configurable: Allows adjustable overcurrent protection and soft-start functions for flexible power supply design.
Cons:
- Package Size: May have limited thermal performance due to the smaller package size.
- Application Specific: Designed specifically for use in offline flyback converters, limiting its versatility for other power supply topologies.
Are There Any Equivalents/Alternatives to FAN7527B for Recommendation?
- The FAN7529 from Fairchild Semiconductor is a similar current mode PWM control IC suitable for flyback converters.
- Alternatives to the FAN7527B include the KA3842A from Fairchild Semiconductor and the UC3842 from Texas Instruments.
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