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Fairchild Power Switch. Sep, 2004 Power Conversion. Green FPS – A Subset of FPS. Green FPS TM is used in low standby power applications that meet the less-than-one-Watt standards (i.e. Energy Star)

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slide1

Fairchild Power Switch

Sep, 2004

Power Conversion

slide2

Green FPS – A Subset of FPS

  • Green FPSTM is used in low standby power applications that meet the less-than-one-Wattstandards (i.e. Energy Star)
  • Green FPS supports environmentally friendly systems (Coffee Pot not in use and plugged into the wall uses less than 1 Watt standby power)
  • Green FPS is an integrated solution of many protection & control features built with the power switch MOSFET in a very small package
  • These highly integrated devices are proprietary and they do not have an exact competitive cross reference match
slide3

Available Packages

TO-3PF-5L

TO-220F-4L

TO-220F-5L

TO-3P-5L

TO-220-5L

7DIP

8DIP

8DIPH

gfps for low power applications
GFPS for Low Power Applications
  • Power Range : 2 ~ 10Watt
  • System Configuration
    • Flyback 1 output
    • Constant Voltage + Constant Current
  • Development Direction
    • Achieve compact size  power switch
    • Low std by power consumption
      • 0.3Watt  0.1Watt  60mWatt
    • No Y cap solution (Motorola Charger)
    • No bias winding to reduce BOM cost
  • FSC Solution
    • FSD200 : No bias winding solution
    • FSD210 : No Y-cap & low std by
    • FSDX321: 10Watt ~ for Auxiliary PS

Ultra Portable

- Mobile Phone

- Camcorder

- PDA /MD/CD

- Digital Camera

Auxiliary PS

- White Goods

- PC SMPS

slide5

FSD200 / FSD210 2nd generation 1Chip FPS

  • □ Features
    • Single Chip 700V SenseFET Power Switch
    • Precision Fixed Operating Frequency with Frequency Modulation

 134kHz±4kHz

    • Internal Start-up Switch & Soft Start up
    • Under Voltage Lockout with Hysterisis

 8.7V/6.7V (FSD210), 7V/6V (FSD200)

    • Over Load Protection (OLP)
    • Auto-restart mode
  • □ Advantages
    • Low Power Consumption in Standby Mode (Burst Operation)

 0.10W under @240Vac (FSD210)

    • Minimum External Components

 Without bias winding, resistor, diode (FSD200)

slide6

Block Diagram of FSD200

Built-in Start up.

Frequency Modulation

Voltage Mode Control

Burst Control

Protection

Peak Current Limit

Soft Start

slide7

Block Diagram of FSD210

Built-in Start up.

Frequency Modulation

Voltage Mode Control

Burst Control

Protection

Peak Current Limit

Soft Start

slide8

System Circuit Diagram

Low cost EMI filter by Frequency Modulation

FSD210 does not require Y-cap components in blue block

FSD200 does not require components in red block

slide10

Features: Frequency Modulation for EMI

Without Frequency Modulation, freq =100kHz

Dead line for Peak level

Dead line for Average level

Peak wave form

Average wave form

  • Fixed frequency oscillators generate EMI in a narrow band of the frequency spectrum
  • • Fairchild’s latest FPSTM devices modulate its frequency over a ±4kHz frequency range
  • • EMI is thus spread over a wider range of frequencies
  • • Allows simple EMI filters to be employed for meeting world
  • wide EMI requirements

With Frequency Modulation, freq =134kHz

slide11

Burst Operation Waveforms

#1 Drain, #3 Vfb, #4 Idrain

Burst operation @ 85Vac, No load

Burst operation @ 265Vac, No load

slide12

Features: Built in Start up with Soft Start

  • The built in startup provides trickle current until the supply reaches a present supply voltage threshold called Vstart
  • Switching starts and the peak current is gradually ratcheted up in fixed increments over a milliseconds
  • This soft startup mechanism helps prevent high current during startup from damaging the components in the SMPS

Drain voltage

Drain current

Start up @ 265Vac

Start up @ 85Vac or short circuit

slide14

EMI Test Result with FSD210 For No Y-cap Solution

AVERAGE & PEAK

QUASI PEAK

  • TEST EQUIPMENT : Rohde & Schwarz EMI Test Receiver, ESCS30
  • SAMSUNG TA CHARGER SET
  • (MADE BY DONGYANG:KR)
  • TEST CONDITION : Vo=5.1V, Io=600mA
slide15

Stand-by Power Loss Test Result with FSD210

Stand-by Power Loss at Output No Load Condition

slide17

FPS Solution for Charger & Adaptor

GND

DRAIN

Vcc

DRAIN

Vstr

DRAIN

Vfb

DRAIN

Vfb

Vcc

NC

Vstr

GND

GND

GND

GND

GND

Vstr

GND

DRAIN

GND

Vfb

Vcc

slide18

Selection Guide for Charger/Adaptor

Protection Option – OLP(Over Load Protection), OCL(Over Current Latch), OVP(Over Voltage Protection), TSD(Thermal Shutdown)

(1) Open Frame

Pin(max) Test Condition : Flyback Converter, Discontinuous Current Mode, Dmax=0.5, Vin(dc)=100V

Green FPSTM in blue

slide21

Comparison Table - FSD200 vs. L*****

  • FSD200

Product Guide

  • L*****