FairchildFSEZ1317NY6WLED Lighting Driver Solution

/a>PSR” title=”PSR”>PSR” title=”PSR”>PSR) and highly integrated PWM controller, standby power consumption less than 300mW, high voltage start-up, with minimal external components, no secondary feedback circuit Constant voltage (CV) and constant current (CC) control, PWM fixed frequency 50kHz, mainly used in mobile phone, cordless phone, PDA, digital camera and other chargers, replacing linear transformers and RCC switching power supply (SMPS). This article introduces the main FSEZ1317 Features, functional block diagram, simplified PSR flyback converter circuit diagram, high voltage start-up circuit diagram and 6W LED lighting driver main features, circuit diagram and transformer circuit diagram.

FSEZ1317: Primary-Side-Regulation PWM with POWER MOSFET Integrated

This third-generation Primary-Side-Regulation (PSR) and highly integrated PWM controller provides several features to enhance the performance of low-power flyback converters. The proprietary topology, TRUECURRENT™, of FSEZ1317 enables precise CC regulation and simplified circuit design for batterycharger applications. A low-cost, smaller, and lighter charger results, as compared to a conventional design or a linear transformer.

To minimize standby power consumption, the proprietary green mode provides off-time modulation to linearly decrease PWM frequency under light-load conditions. Green mode assists the power supply in meeting power conservation requirements.

By using the FSEZ1317, a charger can be implemented with few external components and minimized cost.

FSEZ1317 main features:

 Low Standby Power Under 30mW

 High-Voltage Startup

 Fewest External Component Counts

Constant-Voltage (CV) and Constant-Current (CC) Control without Secondary-Feedback Circuitry

 Green-Mode: Linearly Decreasing PWM Frequency

 Fixed PWM Frequency at 50kHz with Frequency Hopping to Solve EMI Problem

 Cable Compensation in CV Mode

 Peak-Current-Mode Control in CV Mode

 Cycle-by-Cycle Current Limiting

 VDD Over-Voltage Protection with Auto Restart

 VDD Under-Voltage Lockout (UVLO)

 Gate Output Maximum Voltage Clamped at 15V

 Fixed Over-Temperature Protection with Auto Restart

 Available in the 7-Lead SOP and DIP Packages

FSEZ1317 Application:

 Battery chargers for cellular phones, cordless phones, PDAs, digital cameras, power tools, etc.

 Replaces linear transformers and RCC SMPS
FairchildFSEZ1317NY6WLED Lighting Driver Solution
Figure 1. FSEZ1317 Functional Block Diagram
FairchildFSEZ1317NY6WLED Lighting Driver Solution
Figure 2. FSEZ1317 Simplified PSR Flyback Converter Circuit Diagram
FairchildFSEZ1317NY6WLED Lighting Driver Solution
Figure 3. FSEZ1317 High Voltage Startup Circuit Diagram
FairchildFSEZ1317NY6WLED Lighting Driver Solution
Figure 4. Typical Application Circuit Diagram of FSEZ1317

6W LED Lighting Driver

The following reference design supports inclusion of FSEZ1317NY in design of LED illumination.
FairchildFSEZ1317NY6WLED Lighting Driver Solution
6W LED lighting driver main features:

Constant-Voltage (CV) and Constant-Current (CC) Control without Secondary- Feedback Circuitry

Built in 700V/1A MOSFET

Low EMI through Frequency Hopping

Low Power Consumption in Standby

Protection Functions: UVLO, Over-Voltage, Over-Current, and Over-Temperature
FairchildFSEZ1317NY6WLED Lighting Driver Solution
Figure 5. 6W LED Lighting Driver Circuit Diagram
FairchildFSEZ1317NY6WLED Lighting Driver Solution
Figure 6. 6W LED Lighting Driver Transformer Circuit Diagram
For details, see:

The Links:   LQ10D031 6MBI50F-060 LCDDISPLAY

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