© 2008 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FAN7387 Rev. 1.0.0

3

Figure 3. Typical Application Circuit for Full-Bridge Converter

Figure 4. Typical Application Circuit for Fluorescent Lamp Ballast

RT

D1

R3

R4

M1

M2

C3

L

VDD

RCT

VB

HO

VS

LO

GND

8

7

6

5

1

2

3

4

DT/ SD

C1

C2

VDC

D4

R5

R6

M1

M2

C5

VDD

RCT

VB

HO

VS

LO

GND

8

7

6

4

1

2

3

5

DT/ SD

VDD

Q1

RDT1

CT

GND

Shutdown1

Q2

RDT2

GND

Shutdown2

R1

R2

GND

C4

HID Lamp

FAN7387 Rev.1.0

* Note: This capacitor, Cb, is for system stability and must use at least 470nF.

Cb*

Cb*

Lamp

R1

C2

Q1

RDT

CT

RT1

D5

R4

R5

M1

M2

C4

D7

D6

C5

D1

D2

D3

D4

C1

LC6

C7

AC Input

VDD

RCT

VB

HO

VS

LO

GND

8

7

6

5

1

2

3

4

DT/ SD

R2

R3

RT2

Q2

C3

Over-Voltage Protection

R6

R7

C8

ZD1

FAN7387 Rev1.0

* Note: This capacitor, Cb, is for system stability and must use at least 470nF.

Cb*