FSC LCD Backlight Inverter IC Solution

www.fairchildsemi.com

FSC LCD Backlight Inverter IC Solution

Lighting Product Line

Power Conversion

2

FSC Product Line - up

Vcc (V) Dimming Soft Start OLP OLR(=OVP) SCP Vout(Max) Iout(Max)

FAN7547A 1Ch. Buck-Royer 6 ~ 30 Analog, Burst O O O X Vcc 0.2A S

FAN7548 2Ch. Buck-Royer 9 ~ 30 Analog, Burst O O O X 13.5V 0.2A S

FAN7311/A/B P-N Full Bridge 5 ~ 25.5 Analog, Burst O O O X 8.5V 0.2A S

FAN7314/A P-N Half Bridge 5 ~ 25.5 Analog, Burst O O O X 8.5V 0.2A S

FAN7313 Push-Pull 4.5 ~ 25.5 Analog, Burst O Internal (4) O O 6V 0.5A S

FAN7316 N-N Half Bridge 4.5 ~ 24 Analog, Burst O Internal (4) O O 6V 0.5A S

FAN7317 P-N Full Bridge 6 ~ 24 Burst O Internal (4) Internal (4) SLP 6V 0.2/0.3A S

FAN7318 P-N Half Bridge 6 ~ 30 Analog, Burst O Internal (4) Internal (4) SLP 8V 0.3/0.4A D (P12)

3rd G FAN7320 H/B Switch Integration 9 ~ 25.5 Analog, Burst O Internal (4) Internal (4) SLP S

StatusFeatures

Generation Products Description

Ron=30mΩ

0 G

1st G

2nd G

3

Product Introduction

- FAN7313 (Push-pull) / FAN7316 (N-N Half-Bridge)

- FAN7317 (Full-Bridge)

New Product- FAN7318

4

FAN7313/6 Key Features

• Reduce external components

Wide Input Voltage Range : 4.5 ~ 25.5V (FAN7313),4.5 ~ 24V(FAN7316)

Integrated OLP circuit

• Various Protection

OLP, OLR, SCP, TSD, Soft-start, Arc Protection

• Design flexibility

Selectable Dimming Polarity

N-N Half-bridge & Push-pull topology

Analog & Burst dimming

PWM dimming by external pulse signal

Wide input voltage range : 4.5 ~ 24V

5

Reduce External Components

• Wide Input Voltage Range : 4.5 ~ 24V

Can use common Vcc with IC input voltage

1 TR, 1 Zenor D, 2 Resister

• Integrated OLP Circuit

No need open lamp detection circuit

Reduce Feedback rectifier diode

1 TR, 5 Diode (3 BAV55,2 BAV70)

5 Capacitor, 1 Resister (@ 4Lamp)

IC_Vcc

IC_OLP

REF OLP circuit

6

OLP1

R6680

D4BAV70

R7680

0

SN1

GN1

DN1

DN1

GN2

SN2 DN2

DN2

M1

FDS6990A

0

C95p

0

C114.7n

0

0

TX1

C1410n

0

C7 10u

C6

0.1u

C21u

0

C1710n

11

22

CN1CCFL

11

22

CN2CCFL

11

22

CN3CCFL

11

22

CN4CCFL

C1220u

OLR

REF

0

R18100k

0

D1D1N4148

D3BAV70

D5BAV70

OLP1 OLP2

OLP3 OLP4

R141k

R151k

R41k

R51k

0 0

0 0

F1

FUSE

C4 10u

12345678910

CN5

??

R20

10k

R21

10k

C85p

C104.7n

C155p

C184.7n

IC1

FA

N7

31

6

FB

BD

IM

AD

IM

OL

P2

CM

P

GN

D

OL

P1

BC

T

OL

R

RT

OL

P4

OL

P3

OU

TH

SC

P

EN

A

OU

TL

VR

EF

VS

VB

VIN

R2100k

R3100k

0

0

R9100k

R8100k

R13100k

C131u

C1233n

0

0

C194.7n

C31u

0

0

R16680

0

TX2

0

C165p

0

OLP3 OLP4

R17680

R22

100k

OLR

14V

R23N.C.

R19

10k

0

LTM190EX

C2310n

ON/OFF

DIM(0~3.3V)

C201n

0

C24

4.7n

0

0

0

0

0

R1275k

R119.1k

R1012k

C510n

R127k

0

0 00

D2BAV70

OLP2

0

FAN7316 – N-N Half-Bridge

Dual N MOS 1

Control IC 1

BOM

Can delete this

external IC - Vcc

regulation circuit

IC_Vcc


Can delete this external

OLP detection circuit

IC_OLP

REF OLP circuit

7


FAN7314 – P-N Half-Bridge

FAN7316 – N-N Half-Bridge

OLP1

R6680

D4BAV70

R7680

0

SN1

GN1

DN1

DN1

GN2

SN2 DN2

DN2

M1

FDS6990A

0

C95p

0

C114.7n

0

0

TX1

C1410n

0

C7 10u

C6

0.1u

C21u

0

C1710n

11

22

CN1CCFL

11

22

CN2CCFL

11

22

CN3CCFL

11

22

CN4CCFL

C1220u

OLR

REF

0

R18100k

0

D1D1N4148

D3BAV70

D5BAV70

OLP1 OLP2

OLP3 OLP4

R141k

R151k

R41k

R51k

0 0

0 0

F1

FUSE

C4 10u

12345678910

CN5

??

R20

10k

R21

10k

C85p

C104.7n

C155p

C184.7n

IC1

FA

N7

31

6

FB

BD

IM

AD

IM

OL

P2

CM

P

GN

D

OL

P1

BC

T

OL

R

RT

OL

P4

OL

P3

OU

TH

SC

P

EN

A

OU

TL

VR

EF

VS

VB

VIN

R2100k

R3100k

0

0

R9100k

R8100k

R13100k

C131u

C1233n

0

0

C194.7n

C31u

0

0

R16680

0

TX2

0

C165p

0

OLP3 OLP4

R17680

R22

100k

OLR

14V

R23N.C.

R19

10k

0

LTM190EX

C2310n

ON/OFF

DIM(0~3.3V)

C201n

0

C24

4.7n

0

0

0

0

0

R1275k

R119.1k

R1012k

C510n

R127k

0

0 00

D2BAV70

OLP2

0

0

OLP1

R171k

D3BAV70

R161k

0

0

C1115p

0 C3012n

0 0

C2 1u

TX1

0

0

C2110n

R6 82k

C8 10u

C251u

0

0

0

0

D9

BAV99

C2810n

D7

BAV99

D6

BAV99

0

0

R99.1k

0

HOT1

COLD2

CN1CCFL

HOT1

COLD2

CN2CCFL

HOT1

COLD2

CN4CCFL

HOT1

COLD2

CN3CCFL

C22220u

25V or 35V

OLR

C26 1n

0

J1

0

RT

OLP

D10BAW56

REF

R14100k

OUTB

D1BAW56

RT

FB

R1330k

LTM190EX

SN

GN

SP

GP DP

DP

DN

DN

M2

FDS8958A

C6

1u

0

OLP2OLP1

OLP3 OLP4

R121k

R111k

R261k

REF

R131k

0 0

0 0

R15

10k

C91u

0

F1

FUSE

C7 10u

12345678910

CN5

12505WR-10

R24

10k

R27

10k

R25

10k

OUTA

C1015p

C1412n

C1215p

C2912n

IC1 FAN7314

S_S

GND

REF

OLR

ENA

BDIM

OLP

VIN

OUTA

PGND

OUTB

RT1

CT

OUTC

ADIM

EA_IN

EA_OUT

OUTD

RT

BCT

R2210k

R2310k

C192.2n

C202.2n

00

0

0

R2110k

R2010k

C182.2n

C172.2n

0

0

R7 0

R8

100k

Q1KST2222

0

C1512n

C271u

0

0

R181k

0

SN

GN

SP

GP DP

DP

DN

DN

M1

FDS8958A

0

TX2

FB

0

C1315p

0

OLP3 OLP4

D11BAW56

0

R191k

0

OLR

ON/OFF

14V

DIM(0~3.3V)

0

C4

4.7n

C5 220p

R5 27k

0

R256k

R318k

R422k

0

0

C3

4.7nD4BAV70

C1 0.22u

D8

BAV99

0

OLP2

0

OLR

FB

8

Key Features


Wide Input Voltage Range : 4.5 ~ 24V










9

Various Protection

CMP

Error Amp.

FBGND

-

+

-

+0.45*Va Input

Control

Logic

OSC RT

Output

Control

Logic

Drivers

Protection

OLR

1.5s @ Strike

Timer

OUTH

VS

VB

OUTL

VREF

max. 2V

min. 0.5V

-

+

UVLO 4.5VUVLO

Internal

Voltage

ReferenceVINVIN

BDIM

Controller

max. 2V

min. 0.5V

-

+

1.75V0.25V

VSS_STK

VSS_STK

-+

3V

SCP

BDIM

3V -

+

2V-

+

ADIM

BCT/FT

FAULTFAULT

Va

ENA

1.25V

-

+

VREFDRV 6V

OLP4

OLP3

OLP2

OLP1

1.5V

-

+

1.5V

-

+

1.5V

-

+

1.5V

-

+

2V +

TSD 150oC

VSS_STK

VBURST

Disable @ Striking

Fstrike: Fnormal = 1.3:1

2V

-

+

16 switching

cycles @ Normal

VREF

1.5s @ Strike

10ms @ Normal

1) ADIM>3.5V(hys. 0.5V) : Negative

2) ADIM<3.5V : Positive

200k

Protection

ItemDescription

Protection

Condition

SCPShort Circuit

Protection> 2V (@ SCP)

OLROpen Lamp

Regulation> 1.75V (@ OLR)

Arc Arc Protection > 3V (@ OLR)

OLPOpen Lamp

Protection< 1.5V (@ OLP)

TSDThermal Shut

Down150oC (@ Tj)OLP

OLR

Arc

UVLOSCP

TSD

10

Key Features








N-N Half-bridge, Push-pull topology, P-N Half-bridge, P-N Full-bridge




11

Design Flexibility

Negative dimming polarity

OUTL

Lamp

current

BCT

OUTH

2V

0.5V

0V

6V

6V

BDIM

ADIM3.5V

OUTL

Lamp

current

BCT

OUTH

2V

0.5V

0V

6V

6V

BDIM

Positive dimming polarity

ADIM3.0V

1) Positive burst dimming polarity @ ADIM < 3.0V

2) Negative burst dimming polarity @ ADIM > 3.5V


0V

2V

0V

3.3V

0V

0V

Lamp

current

ADIM

CMP

DIM


Lamp

current0V


ADIM

2V

CMP

0V

3.3V

0V

0V

DIM

1) Positive burst dimming polarity

2) Negative burst dimming polarity


2V

CCMP

-

Transconductance

Amplifier

+

+

Lamp

current

sense

ADIM

DIM

REF

2V

CCMP

-

Transconductance

Amplifier

+

+

Lamp

current

sense

ADIM

DIM

REF


12

Design Flexibility

OLP1

R6680

D4BAV70

R7680

0

SN1

GN1

DN1

DN1

GN2

SN2 DN2

DN2

M1

FDS6990A

0

C95p

0

C114.7n

0

0

TX1

C1410n

0

C7 10u

C6

0.1u

C21u

0

C1710n

11

22

CN1CCFL

11

22

CN2CCFL

11

22

CN3CCFL

11

22

CN4CCFL

C1220u

OLR

REF

0

R18100k

0

D1D1N4148

D3BAV70

D5BAV70

OLP1 OLP2

OLP3 OLP4

R141k

R151k

R41k

R51k

0 0

0 0

F1

FUSE

C4 10u

12345678910

CN5

??

R20

10k

R21

10k

C85p

C104.7n

C155p

C184.7n

IC1

FA

N7

31

6

FB

BD

IM

AD

IM

OL

P2

CM

P

GN

D

OL

P1

BC

T

OL

R

RT

OL

P4

OL

P3

OU

TH

SC

P

EN

A

OU

TL

VR

EF

VS

VB

VIN

R2100k

R3100k

0

0

R9100k

R8100k

R13100k

C131u

C1233n

0

0

C194.7n

C31u

0

0

R16680

0

TX2

0

C165p

0

OLP3 OLP4

R17680

R22

100k

OLR

14V

R23N.C.

R19

10k

0

LTM190EX

C2310n

ON/OFF

DIM(0~3.3V)

C201n

0

C24

4.7n

0

0

0

0

0

R1275k

R119.1k

R1012k

C510n

R127k

0

0 00

D2BAV70

OLP2

0

N-N Half-bridge Application Push-pull Application

R21

8.2k

C815p

C1010n

C1515p

C1810n

IC1

FA

N7

31

6

FB

BD

IM

AD

IM

OLP

2

CM

P

GN

D

OLP

1

BC

T/F

T

OLR

RT

OLP

4

OLP

3

OU

TH

SC

P

EN

A

OU

TL

VR

EF

VS

VB

VIN

R2100k

R3100k

0

0

0

R9100k

R8100k

R1310K

C131u

C1233n

C1910n

C31u

0

0

R16680

0 0

C1615p

OLP3

0

OLP4

R17680

R22

47k

OLR

14V

R23100k

R19

10k

C214.7n

0

DIM(0~3.3V)

LTM190EX

ON/OFF

C2310n

C201n

0

0

0

0 0

0

R1256k

R1118k

R1022k

C510n

R127k

00 0 0

D2BAV70

0

OLP2OLP1

R6680

R7680

D4BAV700

0

0

C915p

C1110n

0

0

C1410n

C21u

0

0

C22330p0

TX1

C1710n

TX2

R2833

R2933

C242.2n

C252.2n

SN

GN

SN

GN DN

DN

DN

DN

M1

HUFA76413DK8

HOT1

COLD2

CN135001WR-02A

HOT1

COLD2

CN235001WR-02A

HOT1

COLD2

CN335001WR-02A

HOT1

COLD2

CN435001WR-02A

C1220u

OLR

0

REF

R18100k

0

D3BAV70

D5BAV70

OLP4

OLP1 OLP2

OLP3

R141k

R151k

R41k

R51k

0 0

0 0

F1

FUSE

12345678910

CN5

12505WR-10

R20

10k

0

R24750R

Q12N2222

Q22N2907

R261k

0

0

R25

0R

OLP1

R6680

R7680

D4BAV70

0

00

C95p

C114.7n

0

0

TX1

C1410n

C7 10u

C21u

0

C1710n

11

22

CN135001WR-02A

11

22

CN235001WR-02A

11

22

CN335001WR-02A

11

22

CN435001WR-02A

C1220u

OLR

REF

0

R18100k

0

D3BAV70

D5BAV70

OLP2

OLP4

OLP1

R141k

OLP3

R151k

R41k

R51k

0 0

0 0

F1

FUSE

C4 10u

12345678910

CN5

12505WR-10

R20

10k

R21

10k

C85p

C104.7n

C155p

IC1

FA

N7

31

3

FB

BD

IM

AD

IM

OLP

2

CM

P

GN

D

OLP

1

BC

T

OLR

RT

OLP

4

OLP

3

OU

TH

SC

P

EN

A

OU

TL

VR

EF

VS

VB

VIN

C184.7n

R2100k

R3100k

0

0

R9100k

R8100k

SN

GN

SP

GP

DP

DN

M3

FDD8424H

R13100k C13

1u

C1233n

0

0

C194.7n

C31u

0

0

R16680

0

TX2

0

C165p

OLP3

0

OLP4

R17680

R22

100k

OLR

14V

R23N.C.

R19

10k

0

LTM190EX

ON/OFF

DIM(0~3.3V)

C2310n

C201n

0

C244.7n

0

0

0

0

0

R1275k

R119.1k

R1012k

C510n

R127k

0

00 0

D2BAV70

OLP2

0

0

M22N7002

0

0

R9100k

R8100k

R13100k

12

ZD16.8V

C131u

C1233n

C192.2n

0

C31u

0

0 R16]680

T2

0

OLP3

C163p

0

OLP4

R17680

R22

100k

13.5V

OLR

R23N.C.

0

R19

10k

LTM190EX

ON/OFF

DIM(0~3.3V)

C2310n

0

C201n

C244.7n

0

0

0

0

0

0R1275k

R119.1k

R1012k

C510n

0

R127k

00 0

D2BAV70

OLP2

0

R3010k

R32 2k

R3310k

R3410k

0

0

R24 20k

0

0

D1

BAV99

0

R26

100R

R27

100R

D6

BAV99

R28

100R

R29

100R

SN

GN

SP

GP DP

DP

DN

DN

M2

FDS8958A

C24

0.1u

12

ZD26.8V R31

10k

SN

GN

SP

GP DP

DP

DN

DN

M1

FDS8958A

C22

0.1u

C6220u

OLP1

R6680

R7680

D4BAV70

0

0

0

C93p

C112.2n

0

0

T1

C1410n

C4 10u

0

C21u

C1710n

11

22

CN135001WR-02A

11

22

CN235001WR-02A

11

22

CN435001WR-02A

11

22

CN335001WR-02A

C1220u

OLR

REF

0

R18100k

0

D3BAV70

D5BAV70

OLP1 OLP2

OLP3 OLP4

R1410k

R1510k

R410k

R510k

0

C251u

0

0 0

F1

FUSE

C7 10u

12345678910

CN5

12505WR-10

R20

10k

R21 20k

C83p

C102.2n

C153p

IC1

FA

N7

31

3

FB

BD

IM

AD

IM

OLP

2

CM

P

GN

D

OLP

1

BC

T

OLR

RT

OLP

4

OLP

3

OU

TH

SC

P

EN

A

OU

TL

VR

EF

VS

VB

VIN

C182.2n

R2100k

R3100k

0

P-N Half-bridge Application P-N Full-bridge Application

13

Design Flexibility

Analog & Burst Dimming

CMP

Error Amp.

FBGND

-

+

-

+0.45*Va Input

Control

Logic

OSC RT

Output

Control

Logic

Drivers

Protection

OLR

1.5s @ Strike

Timer

OUTH

VS

VB

OUTL

VREF

max. 2V

min. 0.5V

-

+

UVLO 4.5VUVLO

Internal

Voltage

ReferenceVINVIN

BDIM

Controller

max. 2V

min. 0.5V

-

+

1.75V0.25V

VSS_STK

VSS_STK

-+

3V

SCP

BDIM

3V -

+

2V-

+

ADIM

BCT/FT

FAULTFAULT

Va

ENA

1.25V

-

+

VREFDRV 6V

OLP4

OLP3

OLP2

OLP1

1.5V

-

+

1.5V

-

+

1.5V

-

+

1.5V

-

+

2V +

TSD 150oC

VSS_STK

VBURST

Disable @ Striking

Fstrike: Fnormal = 1.3:1

2V

-

+

16 switching

cycles @ Normal

VREF

1.5s @ Strike

10ms @ Normal

1) ADIM>3.5V(hys. 0.5V) : Negative

2) ADIM<3.5V : Positive

200k

Analog Dimming

Burst Dimming


OUTL

Lamp

current

BCT

OUTH

2V

0.5V

0V

6V

6V

BDIM

ADIM3.5V

0V

2V

0V

3.3V

0V

0V

Lamp

current

ADIM

CMP

DIM


14

Design Flexibility

This method can be applied to FAN7313, FAN7316 application

BCT

Burst signal

to Error Amp.

External

pulse signal

BDIM

2V

0.5V

BCT

+

-

Ich

Q

QSET

CLR

S

R

+

-

Idch

18uA

BDIM +

-

9uA

Burst signal

to Error Amp.External

Pulse Signal

Comparator


15

Design Flexibility

Wide Input Voltage Range : 4.5 ~ 24/25.5V

OLP1

R6680

D4BAV70

R7680

0

SN1

GN1

DN1

DN1

GN2

SN2 DN2

DN2

M1

FDS6990A

0

C95p

0

C114.7n

0

0

TX1

C1410n

0

C7 10u

C6

0.1u

C21u

0

C1710n

11

22

CN1CCFL

11

22

CN2CCFL

11

22

CN3CCFL

11

22

CN4CCFL

C1220u

OLR

REF

0

R18100k

0

D1D1N4148

D3BAV70

D5BAV70

OLP1 OLP2

OLP3 OLP4

R141k

R151k

R41k

R51k

0 0

0 0

F1

FUSE

C4 10u

12345678910

CN5

??

R20

10k

R21

10k

C85p

C104.7n

C155p

C184.7n

IC1

FA

N7

31

6

FB

BD

IM

AD

IM

OL

P2

CM

P

GN

D

OL

P1

BC

T

OL

R

RT

OL

P4

OL

P3

OU

TH

SC

P

EN

A

OU

TL

VR

EF

VS

VB

VIN

R2100k

R3100k

0

0

R9100k

R8100k

R13100k

C131u

C1233n

0

0

C194.7n

C31u

0

0

R16680

0

TX2

0

C165p

0

OLP3 OLP4

R17680

R22

100k

OLR

14V

R23N.C.

R19

10k

0

LTM190EX

C2310n

ON/OFF

DIM(0~3.3V)

C201n

0

C24

4.7n

0

0

0

0

0

R1275k

R119.1k

R1012k

C510n

R127k

0

0 00

D2BAV70

OLP2

0

Can delete this

external IC - Vcc

regulation circuit

IC_Vcc

16

FAN7317 Key Features




Integrated OLR circuit

Integrated P-MOS driving circuit


OLP, OLR, SLP, CMP-high, FB-high,

TSD, Soft-start, Arc Protection

17





Integrated OLR circuit

Integrated P-MOS driving circuit


OLP, OLR, SLP, CMP-high, FB-high, TSD, Soft-start, Arc Protection







18







Reduce Feedback rectifier diode

1 TR, 5 Diode (3 BAV55,2 BAV70)


• Integrated OLR Circuit

No need open lamp regulation circuit

No need feedback diode

2 Capacitor, 4 Diode (BAV70)

3 Resister (@ 4Lamp)

• P-MOS Driving Circuit

2 Zenor D, 2 Capacitor, 2 Resistor

IC_Vcc

IC_OLP

REF OLP circuit

P-MOSFET Gate

IC _ Output

for P-driving

Vcc

19

REFC510n

0

R16470

BDIM(0~3.3V)

C15 10uR1110k

0

TX1

R1210k

TX2

OLP2

0

OLP10

OLR3

R41.4M

IC1

FAN7317

OLP

1

OLR

1

OLP

2

BD

IM

BC

T

OLP

3

RE

F(5

V)

EN

A

CM

P

CT

OLP

4

OLR

2O

LR

3

GN

D

OLR

4

VIN

OU

TD

OU

TC

OU

TA

OU

TB

OLR2OLP2

OLP4

0

OLR2

OLP3

C74.7n

OLR1

R256k

0

0

C13 10u

C81u0

OLR3

0

12345678910

CN2

12505WR-10

C9220p

C175p

R818k

C21u

C203.3n

0

OLP1

0

HOT1

COLD2

CN4CCFL

R722k

HOT1

COLD2

CN1CCFL

HOT1

COLD2

CN5CCFL

OLR4

R310k

0

0

C125p

R5100k

R1

10k

HOT1

COLD2

CN3CCFL

0

0

C63.3n

0 0

C143.3n

0

OLR1

R1410k

0

0

C1033n

0

C1110n

OLR4

SN

GN

SP

GP DP

DP

DN

DN

M1

FDS8958A

C195p

C45p

0

C1220u

SN

GN

SP

GP DP

DP

DN

DN

M2

FDS8958A

0

ON/OFF

R910k

0

0

C31u

R6470

C161u

R1510k

13V

0

0

R10470

C183.3n

F1

FUSE

R13470

OLP4

OLP3


Can delete this

external IC - Vcc

regulation circuit

IC_Vcc

Can delete this external

OLP detection circuit

IC_OLP

REF OLP circuit

Can delete this

OLR circuitCan delete this external

P-MOSFET driving circuit

P-MOSFET Gate

IC _ Output

for P-driving

Vcc

20

Key Features




• System Reliability with Various Protection








21

Various Protection

Protection

ItemDescription

Protection

Condition

SLPShort Lamp

Protection< 0.3V (@ OLR)

OLROpen Lamp

Regulation> 2.0V (@ OLR)

Arc Arc Protection > 3V (@ OLR)

CMP-HighComparator high

protection> 3V (@ CMP)

FB-HighFeedback high

protection> 3.5V (@OLP)

OLPOpen Lamp

Protection< 1/0.5V (@ OLP)

TSDThermal Shut

Down150oC (@ Tj)

OLP

OLR / SLP

Arc

FB-high

Protection

CMP-high

Protection

TSD

UVLO

22

Key Features







P-N Half-bridge, P-N Full-bridge



23

Design Flexibility

This method can be applied to FAN7313, FAN7316 application

BCT

Burst signal

to Error Amp.

External

pulse signal

BDIM

2V

0.5V

BCT

+

-

Ich

Q

QSET

CLR

S

R

+

-

Idch

18uA

BDIM +

-

9uA

Burst signal

to Error Amp.External

Pulse Signal

Comparator


24

REFC510n

0

R16470

BDIM(0~3.3V)

C15 10uR1110k

0

TX1

R1210k

TX2

OLP2

0

OLP10

OLR3

R41.4M

IC1

FAN7317

OLP

1

OLR

1

OLP

2

BD

IM

BC

T

OLP

3

RE

F(5

V)

EN

A

CM

P

CT

OLP

4

OLR

2O

LR

3

GN

D

OLR

4

VIN

OU

TD

OU

TC

OU

TA

OU

TB

OLR2OLP2

OLP4

0

OLR2

OLP3

C74.7n

OLR1

R256k

0

0

C13 10u

C81u0

OLR3

0

12345678910

CN2

12505WR-10

C9220p

C175p

R818k

C21u

C203.3n

0

OLP1

0

HOT1

COLD2

CN4CCFL

R722k

HOT1

COLD2

CN1CCFL

HOT1

COLD2

CN5CCFL

OLR4

R310k

0

0

C125p

R5100k

R1

10k

HOT1

COLD2

CN3CCFL

0

0

C63.3n

0 0

C143.3n

0

OLR1

R1410k

0

0

C1033n

0

C1110n

OLR4

SN

GN

SP

GP DP

DP

DN

DN

M1

FDS8958A

C195p

C45p

0

C1220u

SN

GN

SP

GP DP

DP

DN

DN

M2

FDS8958A

0

ON/OFF

R910k

0

0

C31u

R6470

C161u

R1510k

13V

0

0

R10470

C183.3n

F1

FUSE

R13470

OLP4

OLP3

Design Flexibility

Can delete this

external IC - Vcc

regulation circuit

IC_Vcc

Wide input voltage range 6 ~ 24V

25

New Product Introduction

- FAN7318 P-N Half Bridge Solution

26



Wide Input Voltage Range : 6.0 ~ 30.0 V


Internal OLR circuit

Internal feedback circuit

Internal P-MOS driving circuit


OLP, OLR, SLP, OVP, COMP-Hi, Feedback-Hi, TSD, Soft-start


Adjustable Striking & Protection delay time

DCR mode operation




27







1 TR, 3 Diode (BAW56)


• Integrated OLR Circuit

No need open lamp regulation circuit

2 Capacitor, 2 Diode (BAV70)

4 Resister (@ 4Lamp)

• Integrated Feedback rectifier diode

4 Diode (BAV99) (@4Lamp)

• P-MOS Driving Circuit

1 Zenor D, 1 Capacitor, 1 Resistor

Vcc

IC-Vdd

IC_OLP

OLP 1

OLP 2

OLP 3 OLP 4

IC_OLR

OLR 2OLR 1

OLR 3 OLR 4

IC_FB

FB 1 FB 2

FB 3 FB 4

Vcc

P-MOSFET

GateIC_ P Out

Device Unit Price

TR 2 $0.014

ZD 1 $0.007

BAV D 9 $0.063

Capacitor 6 $0.012

Resistor 12 $0.005

Total 30 $0.101

28

FAN7318HOT

COLD

HOT

COLD

HOT

COLD

HOT

COLD

SN

GN

SP

GP

DN

DN

DP

DP

1T

IME

R

CM

P

AD

IM

CT

OL

R2

OL

P1

OL

R1

OL

P2

2 3 4 5 6 7 8 9 10

20

19

18

17

16

15

14

13

12

11

RE

F

BC

T

BD

IM

EN

A

GN

D

OU

TB

OL

P3

OL

P3

OL

P4

OL

R4

VIN

OU

TA1

2

3

4

5

6

7

8

9

10

OLR1

OLR2

OLR3

OLR4

OLP1

OLP2

OLP3

OLP4ON/OFF

BD

IM

CN1

CN2

CN3

CN4

CN5

M1

T1F1

C1 C2

R1

C8

R9

R8

R10C15R14

C5 C17

C12

C3

C7

C9

IC1

C4

C6

C13

C14

C16

C20

C21

C19

R2

R6

R12

R15 R16

R13

R7

R3

R17C22

R11ADIM

C11 C10

OLP2OLP1 OLP3 OLP4OLR1 OLR2 OLR3 OLR4

R5

REF

C18


Vcc

IC-Vdd

IC_OLP

OLP 1

OLP 2

OLP 3 OLP 4

IC_OLR

OLR 2OLR 1

OLR 3 OLR 4

IC_FB

FB 1 FB 2

FB 3 FB 4

Vcc

P-MOSFET

GateIC_ P Out

29




0

OLP1

R171k

D3BAV70

R161k

0

0

C1115p

0 C3012n

0 0

C2 1u

TX1

0

0

C2110n

R6 82k

C8 10u

C251u

0

0

0

0

D9

BAV99

C2810n

D7

BAV99

D6

BAV99

0

0

R99.1k

0

HOT1

COLD2

CN1CCFL

HOT1

COLD2

CN2CCFL

HOT1

COLD2

CN4CCFL

HOT1

COLD2

CN3CCFL

C22220u

25V or 35V

OLR

C26 1n

0

J1

0

RT

OLP

D10BAW56

REF

R14100k

OUTB

D1BAW56

RT

FB

R1330k

LTM190EX

SN

GN

SP

GP DP

DP

DN

DN

M2

FDS8958A

C6

1u

0

OLP2OLP1

OLP3 OLP4

R121k

R111k

R261k

REF

R131k

0 0

0 0

R15

10k

C91u

0

F1

FUSE

C7 10u

12345678910

CN5

12505WR-10

R24

10k

R27

10k

R25

10k

OUTA

C1015p

C1412n

C1215p

C2912n

IC1 FAN7314

S_S

GND

REF

OLR

ENA

BDIM

OLP

VIN

OUTA

PGND

OUTB

RT1

CT

OUTC

ADIM

EA_IN

EA_OUT

OUTD

RT

BCT

R2210k

R2310k

C192.2n

C202.2n

00

0

0

R2110k

R2010k

C182.2n

C172.2n

0

0

R7 0

R8

100k

Q1KST2222

0

C1512n

C271u

0

0

R181k

0

SN

GN

SP

GP DP

DP

DN

DN

M1

FDS8958A

0

TX2

FB

0

C1315p

0

OLP3 OLP4

D11BAW56

0

R191k

0

OLR

ON/OFF

14V

DIM(0~3.3V)

0

C4

4.7n

C5 220p

R5 27k

0

R256k

R318k

R422k

0

0

C3

4.7nD4BAV70

C1 0.22u

D8

BAV99

0

OLP2

0

OLR

FB

HOT

COLD

HOT

COLD

HOT

COLD

HOT

COLD

SN

GN

SP

GP

DN

DN

DP

DP

1T

IME

R

CM

P

AD

IM

CT

OL

R2

OL

P1

OL

R1

OL

P2

2 3 4 5 6 7 8 9 10

20

19

18

17

16

15

14

13

12

11

RE

F

BC

T

BD

IM

EN

A

GN

D

OU

TB

OL

P3

OL

P3

OL

P4

OL

R4

VIN

OU

TA1

2

3

4

5

6

7

8

9

10

OLR1

OLR2

OLR3

OLR4

OLP1

OLP2

OLP3

OLP4ON/OFF

BD

IM

CN1

CN2

CN3

CN4

CN5

M1

T1F1

C1 C2

R1

C8

R9

R8

R10C15R14

C5 C17

C12

C3

C7

C9

IC1

C4

C6

C13

C14

C16

C20

C21

C19

R2

R6

R12

R15 R16

R13

R7

R3

R17C22

R11ADIM

C11 C10

OLP2OLP1 OLP3 OLP4OLR1 OLR2 OLR3 OLR4

R5

REF

C18

30












DCR mode operation




31

FAN7318 Application Circuit

Vcc = 15V, P-N Half Bridge

Lamp Current = 7.0mA

Fm : 46.5KHz

Fstr : 65KHz

Fbus: 320Hz

Vstr : Over 1700V

Panel : M220EW01 (AUO 22”)

32

ADIM

Protection

UVLO 5.5V

Voltage Reference

& Internal BiasREF

VIN

CT

CMP

Control

Logic

BCT

BDIM

-

+

3.5V

High_FB

OUTB

OUTA

GND

High_FB

OLP1

OLP2

-

+

OLR3

OLR4

OLR1

OLR2

OLP3

OLP4

Output Driver

Oscillator

Full Wave

Recifier

TSD 150oC

-

+

-

+

-

+

3.5VHigh_CMP

-

+

OLP

Full or Half

Wave

Rectifier

0.7V/0.5V

-

+

1.35V

ENA

-

+

-

+2VOpen Lamp Regulation

TIMER

-

+

@ striking/normal

3V/1V

Min.

Max.

High_CMP

OLP

Various Protection

Protection DescriptionProtection

Condition

Delay

Time

@ 1uF

SLPShort Lamp

Protection

U 0.3V @

OLR (min.)20mS

OLROpen Lamp

RegulationU 2V (@ OLR)

OVPOver Voltage

Protection

O 1.4V (@

OLR)20mS

OLPOpen Lamp

Protection

U 0.7/0.5V (@

OLP)1.5/0.5S

CHP

Comparator

High

Protection

O 3.5V (@

CMP)1.5/0.5S

FHP

Feedback

High

protection

O 3.5V (@

OLP)

80uS

@50KHz

TSDThermal

Shut Down

O 150oC (@

Tj)

OLP

OLR / FB

SLP

OVP

FB-Hi

COMP-Hi

TSD

O : Over / U : Under

33

Soft Start

Soft start operated by BCT waveform

Normal Mode Burst Dimming Mode

BCT

CMP

Frequency

I Lamp

34

Open Lamp Protection

Open Lamp Protection delay time is adjusted by C timer (@1uF)

Open Lamp Protection disable for DCR Mode by ENA voltage

Normal Operation (ENA < 2.1V) OLP Disable (ENA > 2.5V)

OLP2

OLP1

OLP3

OLP4

Timer

OLP1

OLP3

OLP4

Lamp 1 Open

Lamp 1 Open

OLP delay time ≈ 500mS

Protection Condition

OLP <0.7/0.5V

35

Short Lamp Protection

Short Lamp Protection delay time is adjusted by C timer (@ 1uF)

Short Lamp Protection disable for DCR Mode by ENA voltage

Normal Mode (ENA < 2.1V) SLP Disable ENA > 2.5V

Timer

OLR

Lamp Current

Protection Condition

OLR <0.3VSLP delay time ≈ 20mS

36

Open Lamp Regulation & OVP

OLR Voltage regulated at 2V

Over Voltage Protection delay time is adjusted by C timer (@1uF)

Error Amp Source Current Change

to protect overshoot

22uA OLR<1.4V

3.2uA OLR>1.4V

0uA OLR>2.0V

≈1.4V

@ Striking Mode

CMP

OLR

CMP Slope Change

@ Normal Mode

OLR

Timer

CMP

OLR

@ Striking Mode

Timer

≈1.4V

≈20mS

≈2.0V

Disabled

37

CMP (Error Amp. Output) High Protection

CMP High Protection operated over 3V

CMP High Protection delay time is adjusted by C timer (@1uF)

CMP source current decreases from 22uA to 3.2uA for CMP high protection disable

Timer

Primary

Current

CMP Hi P delay time ≈ 500mS

CMP-Hi Protection Disable Method

1.0MΩ1 TIMER

CMP

ADIM

CT OLR2

OLP1

OLR1

OLP2

2

3

4

20

19

18

17

Normal Mode CMP-Hi P Disable

VIN

2.5VCMP

38

Feedback High Protection

Feedback High Protection operated over OLP 3.5V

Feedback High Protection delay time is decided by 8 cycle 3.5V OLP Voltage

CMP

BCT

8 Cycle ≈ 80uS @ 50Khz main frequency

(Disable @ Striking Mode)Normal Mode

3.5V

OLP

39

Key Features











DCR mode operation




40

Adjustable Protection Delay & Striking Time

TIMER

-

+

On @ OVP, SLP

@ striking/normal

1μF

2μA50μA

3V/1V

On @ High_CMP, OLP

Clear all protection condition

Protection

OLP1

OLP2

OLP3

OLP4

150μs

Delay

Striking off

OLP

Striking/normal

OLP min.

0.7V/0.5V

-

+

4 Output

Pulses

CounterMin. & Max.

Detector

/Full Wave

Rectifier

dt = Cdv/I

OVP, SLP dt = 1u / 50u = 20mS

OLP, High_CMP dt = 1u / 2u = 0.5S (Normal)

dt = 1u X 3 / 2u = 1.5S (Striking)

OLP dt = 1u X 3 / 2u = 1.5S (Striking)

T strike off = t OLP + 4 OLP out

= 1.5 + 40u (@ fmain = 50KHz)

≈ 1.5S

dt = Cdv/I

Protection Delay Time Striking Time

41

DCR Mode Operation

DCR Mode Operated by ENA voltage (> 2.5V)

Minimum lamp current = 0mA (Open lamp protection disabled)

Open lamp protection operated by Over Voltage Protection (OLRv>1.4V, Tdelay = 20mS @ 1uF Ctimer)

@ Normal Mode

OLR

Lamp Open

Timer

≈1.4V

≈20mS

≈2.0V

Disabled

Over Voltage Protection @ OLP condition

Timer

CMP

OLR

@ Striking Mode

/5mS

/500mS

DCR Mode Operation OLP Disable @ OLP condition

OLP2

OLP1

OLP3

OLP4

Timer

OLP1

OLP3

OLP4

Lamp1 Open No Protection

CT

BDIM

CMP

ILamp

/1S

0%

0mA

100%

I Max

(Test condition : OVP disable)

42

Analog & Burst Dimming

Analog Dimming Burst Dimming

ADIMNegative

Analog

Dimming

ADIM

Vref

1.34V1.16V

0.67V

0.5V

1.16V=1.34V*0.87

1.86V

0.67V=1.34V*0.50

Error Amp.

Linear region

0~4V

-

+

OLP max.Polarity : Negative

ADIM=0V

ILamp

= 12mA

ADIM=1V

ILamp

= 9mA

ADIM=1.5V

ILamp

= 6mA

ADIM=2V

ILamp

= 5mA

ADIM=2.2V

ILamp

= 5mA

ADIM=2.5V

ILamp

= 5mA

Polarity : Negative

CMP

Ilamp

=1.67mA

BCT

BDIM

=1.8V

CMP

Ilamp

=3.01mA

BCT

BDIM

=1.7V

CMP

Ilamp

=3.88mA

BCT

BDIM

=1.6V

CMP

Ilamp

=4.54mA

BCT

BDIM

=1.5V

CMP

Ilamp

=5.67mA

BCT

BDIM

=1.0V

CMP

Ilamp

=5.99mA

BCT

BDIM

=0.95V

Duty : 20% Duty : 30%

Duty : 40% Duty : 50%

Duty : 70% Duty : 75%

43

Burst Dimming by external Pulse signal

BCT

BDIM

-

+

disable @ striking

External Pulse Signal

Ref.

BCT

Burst signal

to Error Amp.

External

pulse signal

BDIMBCT

BDIM

-

+

disable @ strikingExternal Pulse Signal

Burst Dimming implemented by external Pulse signal

Polarity : Negative

BCT

BDIM

I Lamp

BDIM

BCT

I Lamp

BDIM

Burst signal

to Error Amp.

External

pulse signal

BCT

Polarity : Positive

4444

Product Roadmap - Backlight

FAN7317P-N FB

FAN7316N-N HB

2007 2008 2009

FAN7344RGB 3Ch.

FAN7318P-N HB

FAN7320N-N HB

MOS Integrated (4Lamp)

2010 2011

FAN732XN-N HB

FAN7318AP-N HB

FAN7319P.P

Super IP Solution

FAN73428Ch WLED

FAN73438Ch WLED

FAN7342XWLED

FAN7344XRGB LED

FAN7343XWLED

CC

FL

LE

D

FAN7313P.P.

• Channel Optimization

• High efficiency

Protection Integrated

MOS Integrated

Low Cost (2 Lamp)

FAN7313AP.P.

FAN732XN-N HB

FAN733XP.P.

FAN733XP.P.

Customer optimized

Documents

FSC LCD Backlight Inverter IC Solution