Fairchild FAN7930B, FAN7621S, FCPF11N60NT, FDPF7N60NZ service manual

Fairchild Reference Design

Application

Fairchild Device

Input Voltage Range

Output

Power

Output Voltage

(Rated Current)

LED SMPS

FAN7930B
FAN7621S

FCPF11N60NT

FDPF7N60NZ

85-277VAC@300VAC

MAX

150W

103V(1.46A)

© 2011 Fairchild Semiconductor Corporation 1 RD-L013_FL7930B_FAN7621S_UniFET2 • Rev. 1.0.0

www.fairchildsemi.com

The following reference design supports inclusion of FEB-L013 in design of LED
SMPS. It should be used in demo board with the FL7930B, FAN7621S and discrete
datasheet as well as Fairchild’s application notes and technical support team. Please visit
Fairchild’s website at http://www.fairchildsemi.com.

Key Features

 Constant-Voltage (C.V) and Constant-Current (C.C) Control with Secondary-

Feedback Circuitry

 Low EMI through zero current switching of PFC and zero voltage switching of DC-

DC converter

 Precise Adjustable Ouput over-voltage Protection
 Internal Soft start and overshoot-less control
 Internal Total Harmonic Distortion(THD) Optimizer
 Variable frequency control with 50% duty cycle for half-bridge resonant converter

topology

 Fixed dead time(350ns)
 Up to 300kHz operating frequency
 Auto-restart operation for all protections with an external LV

CC

 Low gate charge
 Low Crss
 Fast switching
 100% avalanche tested
 Improved dv/dt capability
 ESD Improved capability
 Protection Functions: UVLO, Over-Voltage, Over-Current

www.fairchildsemi.com

RP38A

0.2

DP5

RS1M

RP17

10

CP17

10uF/16V

RP2

1M

M3

FDPF7N60NZ

CP18

12n

CP1

22nF/630V

RP36

10k

CP6

33uF/25V

RP37

1k

CP4

120uF/450V

DP3

RS1M

ZDP2

MMSZ5235

RP15

47k

CS11

220nF

C2

3.3n

0

RP10

33k

M1

FCPF11N65

CS3

470nF

LF2

10mH

1 2

3 4

RS2

1M

U1 F AN7930B

VCC

8

GND

6

INV

1

ZCD

5

CS

4

OUT

7

OVP

2

COMP

3

RP13

4.3M

CP22

6.8uF/50V

CP8

120uF/450V

0

CP20

0.68uF/630V

RP33

0.1/5W

CS4

470nF

RP20

4.3M

CS8

47uF

DP4

LL4148

DP1

FFPF08H60S

RS1

1M

ZDP1

MMSZ5248

PFC

RP1

390k

RP18

4.7

RS3

1M

RP30

10K

CP15

1nF

RP5

68K/2W

CP5

120uF/450V

FG

J2

CON2

1

2

Q4

MMBT2222A

DP6

LL4148

RP28

3

RP22

10

U4

MMBT2907A

DP7

LL4148

RP35

3

RP34

10

U5

MMBT2907A

0

Q2

MMBT2907A

CS9

4.7nF

CS10

4.7nF

LF1

10mH

1 2

3 4

RP11

10k

VDC

CP21

33uF/25V

CP9

0.1uF

TM1

EER3019N

4
5
3
1
210

8

6
7
9

CP16

1nF

RP3

4.3M

CN1

CON3

1

2

RP16

27

- +

BD1

123

4

RP21

4.3M

RP8

10k

ZNR1

12

RP14

4.3M

U3

MMBT2907A

RP12

24K

CP11

470pF

Q3

MMBT2222A

CP2

33uF/25V

RP4

4.3M

RP7

0

CS7

47uF

RP27

5.2K

CS6

47uF

PC1A

PS2561

1

2

Q1

MMBT2222A

0

00

0

0

VDC

0

RP29

75K

RP31

75K

0

CS5

47uF

0

0

ISENSE

CP14

1uF

FAN7621S

U2

FAN7621S

1.HVcc

2.CTR

3.HO

6.A/R

8.RT

9.CS

10.SG

12.LVcc

14.LO

16.PG

RP6

0

RP24

8.2k

CP7

680p

D1

FFPF20UA60DN

CP10

1uF

VAUX

CS1

47uF

J1

CON12

123456789

101112CS2

47uF

D2

FFPF20UA60DN

C1

100nF

VLED

CP19

100p

RP9

1M

RP32

10k

RP19

10

M2

FDPF7N60NZ

RP23

2k

DS1

RS1M

F1

FS101

RP25

2.7k

PC1B

PS2561

4

3

CP13

33uF/25V

DP2

RS1M

ZDP3

MMSZ5248

RP26

33k

VFB

TM2

EER3543

1234567

16

10981215141311

FB

CS6
33uF/25V

VAUX

RS56

47k

CS25

220nF

RS41

4.7k

ISENSE

RS33

47k

CS19

220nF

VLED

U6A

LM358/ON

+

3

-

2

V+

8

V-

4

OUT

1

DS2
LL4148

VFB

U6B

LM358/ON

+

5

-

6

V+

8

V-

4

OUT

7

DS3
LL4148

RS40
100k

RS42 0.1

U7
TL431

VAUX

RS35
13k

RS57
330k

J6

CON12

1
2
3
4
5
6
7
8

9
10
11
12

RS44 N.C

R46 N.C

RS55
120k

RS49
1k

RS59

8.2k

1. Schematics

© 2011 Fairchild Semiconductor Corporation 2 RD-L013_FL7930B_FAN7621S_UniFET2 • Rev. 1.0.0

Figure 1. Schematic

www.fairchildsemi.com

1,2

N

p

NauxA

10

9

3,4

NauxB

6

7

EER3019N

10

9

1,2

3,4

N

P

0.1φ * 50
39T

N

auxA

0.3φ / 5T

7

6

N

auxB

0.3φ / 5T

No

Winding

Pin(S → F)

Wire

Turns

Winding Method

1

Np

3,4 → 1,2

0.1φ×50

39 Ts

Solenoid winding 2 Insulation : Polyester Tape t = 0.025mm, 3Layers

3

NauxA

10 → 9

0.3φ

5 Ts

Solenoid winding 4 Insulation : Polyester Tape t = 0.025mm, 3Layers

5

NauxB

6→ 7

0.3φ

5Ts

Solenoid winding

6

Insulation : Polyester Tape t = 0.025mm, 3Layers

Pin

Spec.

Remark

Inductance

3,4 → 1,2

194uH ±5%

100KHz, 1V

2. Transformer

2.1 Connections PFC Transformer and Winding Specifications

Table 1. Winding specifications.

Figure 2. Transformer specifications & construction.

Table 2. Electrical Characteristics.

© 2011 Fairchild Semiconductor Corporation 3 RD-L013_FL7930B_FAN7621S_UniFET2 • Rev. 1.0.0