FAN7547A Просмотр технического описания (PDF) - Fairchild Semiconductor

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FAN7547A

LCD Backlight Inverter Drive IC

Fairchild Semiconductor 

Electrical Characteristics

Unless otherwise noted, these specifications apply to the operating ambient temperatures for the FAN7547A with

-25°C ≤ TA ≤ 85°C and VCC = 10V.

Symbol

Parameter

UVLO SECTION

VST Start Voltage

IST

Start Current

ICC

Operating Current

REFERENCE SECTION

Vref Reference Voltage

SOFT-START SECTION

ISS

Soft -Start Charge Current

Ipwm PWM Discharge Current

OSCILLATOR SECTION

fpwm Operating Frequency

Vpwmh Osc High Voltage

VpwmI Osc Low Voltage

DIMMING SECTION

Va

Analog Dimming Range

Vb

Va

PWM Dimming Range

Vb

Va

Mixed Dimming Range

Vb

MODE SELECTION

Vsa Analog Dimming Select Voltage

Vsp PWM Dimming Select Voltage

Vsc

Mixed Dimming Select Voltage

OPEN-LAMP PROTECTION

Vopen Open-Lamp Detect Voltage

SHUTDOWN PROTECTION

Isd

Shutdown Current

Vsd Shutdown Voltage

OUTPUT SECTION

VOH Output High Voltage

VOL Output Low Voltage

tr

Rising Time

tf

Falling Time

VUV

Output Voltage with UVLO

Activated

Conditions

Min. Typ. Max. Unit

VCC = 4.5V

7V < VCC< 30V

4.9 5.4 5.9 V

50 200 μA

5.5 8.0 mA

TJ = 25°C, Iref = 0mA, 7V < VCC< 30V 2.95 3.05 3.15 V

CSS = 4V

CSS = 4V

33 40 47 μA

48 70 85 μA

7V < VCC < 30V

170 200 230 Hz

1.3

V

0.1

V

Vms > 2V

Vms < 1V

Vms =1.5V or open

0

3

V

3

V

2.1 2.5 2.9 V

0

2.5 V

1.2

3.0 V

0

3

V

1.5 2.0 2.5 V

0.7 1.0 1.3 V

1.2 1.5 1.8 V

7V < VCC < 30V

7V < VCC < 30V

2.5 3.0 3.5 V

1

2

3 μA

2.5 3.0 3.5 V

VCC = 10V

VCC = 10V

VCC = 10V

VCC = 10V

VCC = 4V

8

9 10 V

1

V

120 200 ns

60 120 ns

2

4

V

© 2005 Fairchild Semiconductor Corporation

FAN7547A Rev. 1.0.3

5

www.fairchildsemi.com

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