Fairchild Reference Design RD-442

Fairchild Reference Design RD-442

The following reference design supports inclusion of FSFR2100 in design of an auxiliary

power supply. It should be used in conjunction with the FSFR2100 datasheet as well as

Fairchild’s application notes and technical support team. Please visit Fairchild’s website

at

www.fairchildsemi.com

.

Application

Fairchild Device

Input Voltage

Range

Rated

Output

Power

Output Voltage

(Rated Current)

Topology

Auxiliary Power

FSFR2100

185-265 V

AC

312 W

24 V (10 A)

12 V (6 A)

PCF +

Resonant

Half-Bridge

Key Features



Variable Frequency Control with 50% Duty Cycle for Half-Bridge Resonant

Converter Topology



High Efficiency through Zero Voltage Switching (ZVS)



Internal SuperFET®s with Fast-Recovery Type Body Diode (trr=120 ns)



Fixed Dead Time (350 ns) Optimized for MOSFETs



Up to 300 kHz Operating Frequency



Pulse Skipping for Frequency Limit (Programmable) at Light-Load Condition



Remote On/Off Control Using Control Pin



Protection Functions: Over-Voltage Protection (OVP), Over-Load Protection (OLP),

Over-Current Protection (OCP), Abnormal Over-Current Protection (AOCP), Internal

Thermal Shutdown (TSD)

1. Schematic

2. Transformer

2.1.

Winding Specification

Windings

_(S→F)

Pins

Strands x Wire ø

Turns

Np

7→1

22 x 0.16 mm

36

N24a

13→15

1 x 0..224 mm

4

N25b

13→16

150 x 0.1 mm

4

N12a

11→12

150 x 0.1 mm

2

N12b

9→12

150 x 0.1 mm

2

Na

5→4

1 x 0.224 mm

3

2.2.

Electrical Characteristics

Pin

Specification

Remark

Inductance

7→1

640 µH +/-5%

100 kHz, 100 mVrms

3. Bill of Materials

Reference

Value / Specification

Qty

Manufacturer / Series

C102

120pF / 25V

1

any SMD 0805

C103

33nF / 630V

1

Arcotronics R76

C105

47uF / 50V

1

any electrolytic capacitor

C106

150nF / 25V

1

any SMD 1206

C107

6.8uF / 25V

1

Kemet T491 3528-21

C108

10nF / 25V

1

any SMD 0805

C109

680pF / 50V

1

any SMD 0805

C110

10uF / 50V

1

any electrolytic capacitor

C200

470uF / 35V

1

Rubycon ZL

C201,C202

470uF / 50V

2

Rubycon ZL

C203

33nF / 25V

1

any SMD 0805

C204

2.2nF / 50V

1

any SMD 0805

C205

not assembled

1

any SMD 0805

D101

RS1J

1

Fairchild Semiconductor

D102

MM3Z18VC

1

Fairchild Semiconductor

D105

FDLL4148

1

Fairchild Semiconductor

D211,D212

FYP2010DN

2

Fairchild Semiconductor

D213

FYP2006

1

Fairchild Semiconductor

HS2,HS202

Fischer_SK48

2

Fischer Elektronik SK48

HS201

Fischer_SK09

1

Fischer Elektronik SK09

IC2

FSFR2100

1

Fairchild Semiconductor

IC3

FOD817BW

1

Fairchild Semiconductor

IC201

KA431LZ

1

Fairchild Semiconductor

Output 1,Output 2

MKDSN1,5/2

2

Phoenix Contact MKDSN 1,5

Q101

KST43

1

Fairchild Semiconductor

R101

0.1R / 2W

1

any low inductance

R102,R202

1K / 0.125W

2

any SMD 0805

R104

5.6K / 0.125W

1

any SMD 0805

R105,R203

10K / 0.125W

2

any SMD 0805

R106

270R / 0.125W

1

any SMD 0805

R107

4.7K / 0.125W

1

any SMD 0805

R108

3K / 0.25W

1

any SMD 1206

R109

330K / 0.6W

1

any axial 0207

R201

2K / 0.25W

1

any SMD 1206

R204

130K / 0.125W

1

any SMD 0805

R205

7.5K / 0.125W

1

any SMD 0805

R206

2.2K / 0.125W

1

any SMD 0805

R207

56K / 0.125W

1

any SMD 0805

R208

not assembled

1

any SMD 0805

TR1

TRNSFMR

1

see spec

Reference

Value / Specification

Qty

Manufacturer / Series

C5

680nF / 450V

1

Epcos B32522N

C6

33uF / 50V

1

any electrolytic capacitor

C7

33nF / 25V

1

any SMD 1206

C8

470nF / 25V

1

any SMD 1206

C9

220uF / 450V

1

Epcos B43504

C10

10nF / 100V

1

any X7R ceramic capacitor

C11

22pF / 50V

1

any SMD 0805

C12

470nF / 25V

1

any SMD 0805

D1,D8

FDLL4148

2

Fairchild Semiconductor

D2

RURP860

1

Fairchild Semiconductor

D4,D5,D6,D7

1N5407

4

Fairchild Semiconductor

FS1

230V / T4A

1

Littlefuse TR5

HS1

Fischer_SK09

1

Fischer Elektronik SK09

IC1

FAN7530M

1

Fairchild Semiconductor

Q1

FCP11N60

1

Fairchild Semiconductor

R1

20K / 0.125W

1

any SMD 0805

R2

91K / 0.25W

1

any SMD 1206

R3b,R3a

470K / 0.25W

2

any SMD 1206

R4

100R / 0.6W

1

any SMD 1206

R5,R9

10K / 0.125W

2

any SMD 0805

R6

10R / 0.125W

1

any SMD 0805

R7

0.1R / 2W

1

any low inductance

R8

4.3K / 0.125W

1

any SMD 0805

R10a

470K / 0.6W

1

any axial 0207

R10b

430K / 0.6W

1

any axial 0207

R11

5.6K / 0.125W

1

any SMD 0805

T1

TRNSFMR EFD30

1

f.e. EPCOS, see spec

4. Related Resources

FSFR2100– Product Folder

Reference Design Disclaimer

Fairchild Semiconductor Corporation (“Fairchild”) provides these reference design services as a benefit to our customers. Fairchild has made a good faith attempt to build for the specifications provided or needed by the customer. Fairchild provides this product “as is” and without “recourse” and MAKES NO WARRANTY, EXPRESSED, IMPLIED OR OTHERWISE, INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

Customer agrees to do its own testing of any Fairchild reference designs in order to ensure design meets the customer needs. Neither Fairchild nor Customer shall be liable for incidental or consequential damages, including but not limited to, the cost of labor, requalifications, rework charges, delay, lost profits, or loss of goodwill arising out of the sale, installation or use of any Fairchild product.

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All solutions, designs, schematics, drawings, boards or other information provided by Fairchild to Customer are confidential and provided for Customer’s own use. Customer may not share any Fairchild materials with other semiconductor suppliers.