FAN7313 Просмотр технического описания (PDF) - Fairchild Semiconductor

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FAN7313

LCD Backlight Inverter Drive IC

Fairchild Semiconductor 

Internal Block Diagram

ENA

VIN

1.25V

+

-

1μA

UVLO 4.5V

VIN

+

-

DRV 6V

Internal

Voltage

Reference

UVLO

+

3V -

+

0.25V

2V -

Timer

16 switching

cycles @ Normal

2s @ Strike

+

- 2V

OLR

BDIM

BCT/FT

-

2V +

Positive dimming polarity

Gm Amp. with only

sink current

Disable @ Striking

max. 2V

min. 0.5V

FAULT

BDIM

VBURST

Controller

2.3V

Protection

TSD 150 °C

FAULT

0.45*Va +

-

Input

Control

Logic

VSS_STK

Drivers

VREF

FB

ADIM Va

CMP

2.2V

-

+

+

Error Amp.

VSS_STK

OLP1

20μA

-

1V

+

Output

Control

Logic

VSS_STK

OSC

max. 2V

min. 0.5V

Frequency sweep 4ms

Fstrike: Fnormal = 1.3:1

-

20μA

+

1V

VREF

SCP

VB

OUTH

VS

OUTL

GND

RT

OLP3

OLP2

20μA

-

1V

+

-

20μA

+

1V

OLP4

Figure 1. Functional Block Diagram of FAN7313

FAN7313 Rev. 01

© 2006 Fairchild Semiconductor Corporation

FAN7313 Rev. 1.0.0

2

www.fairchildsemi.com

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