Fairchild FPS Series, Руководство по конструкции

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www.fairchildsemi.com/fps
FPS
™
Design Guide
Simplified Application Circuit for FPS ™ Features
• Optimal Solution for Off-Line SMPS
• Integrated Avalanche Rugged SenseFET
• Pulse-by-Pulse Current Limiting
• Various Protection Functions
(Over Voltage, Over Load, Over
Current, Thermal Shutdown)
• Burst Mode Operation for Low
Standby Power
• Frequency Modulation for Reduced EMI
• Soft Start Function
• Operation Frequency Options
(50/70/100/134kHz)
• External Frequency Synchronization
• Quasi Resonant
Snubber
Circuit
Load
+
+ + +
Feedback
Circuit
Control
IC
FPS™
Advantages
• Low Standby Consumption with Burst Mode Operation
• Fully Avalanche Rugged, 650V and 800V SenseFETs Improves Reliability
• Reduced EMI with Fully Integrated Frequency Modulation
• Reduces the Total Bill-of-Materials Cost with Integrated Protection and Control Functions
• Broad Application Coverage with Extensive Expertise and Easy-to-Use Design Tools
Green FPS™ Features and Advantages
FPS™ Parallel Dice Solution
(Side- by- Side)
GND Vcc Ipk FB
Drain Drain Vstr Drain
SenseFET
PWM
IC
FPS™ Single Die Solution
(BCDMOS)
GND GND VFB GND
Vstr Drain Vcc