5

www.fairchildsemi.com

FAN7311 Rev. 1.0.0

Electrical Characteristics

For typical values Ta=25

°C, Vcc=12V and for min/max values Ta is the operating ambient temperature range with

-25

°C ≤ Ta ≤ 85°C and 5V ≤ Vcc ≤ 25.5V, unless otherwise specified.

Characteristics

Symbol

Test Condition

Min.

Typ.

Max.

Unit

REFERENCE SECTION ( Recommend X7R Capacitor )

Line Regulation

∆Vref

5

≤ V

-

2

25

mV

2.5V Regulation Voltage

V25

-

2.45

2.5

2.55

V

OSCILLATOR SECTION(MAIN)

Oscillation Frequency

fosc

Ta = 25

°C, Ct = 270pF

Rt = 18k

108

115

122

kHz

Ct = 270pF, Rt = 18k

106

115

124

CT High Voltage

Vcth

-

-

2.0

-

V

CT Low Voltage

Vctl

-

-

0.5

-

V

OSCILLATOR SECTION(BURST)

Oscillation Frequency

foscb

Ctb = 10nF, Rt=18k

195

225

255

Hz

BCT High Voltage

Vbcth

-

-

2

-

V

BCT Low Voltage

Vbctl

-

-

0.5

-

V

ERROR AMP SECTION

Open Loop Gain

-

-

80

-

dB

Unit Gain Bandwidth

-

-

1.5

-

MHz

Feedback Output High Voltage

Veh

EA_IN = 0V

2.0

2.27

2.54

V

Output Sink Current

lsin

EA_OUT = 1.5V

-

-

-1

mA

Output Source Current

lsur

EA_OUT = 1.5V

1

-

-

mA

EA_IN Driving Current On OLR

Iolr

-

75

105

135

uA

EA_IN Driving Current On Burst Dimming

Iburst

-

61

85

109

uA

Feedback High Voltage On Burst Dimming

Vfbh

R(EA_IN) = 60k

Ω

Va+0.1

Va+0.4

Va+0.7

V

SOFT START SECTION

Soft Start Current

S_S=2V

4

6

8

uA

Soft Start Clamping Voltage

Vssh

-

-

5

-

V

PROTECTION SECTION

Open Lamp Protection Voltage 0

Volp0

Start at open lamp

2.2

2.5

2.8

V

Open Lamp Protection Voltage 1

Volp1

Normal -> open lamp

1.3

1.5

1.7

V

Open Lamp Regulation Voltage

Volr

-

1.75

2

2.25

V

Open Lamp Protection Charging Current

Iolp

-

0.7

1.4

2.1

uA

UNDER VOLTAGE LOCK OUT SECTION

Start Threshold Voltage

Vth

-

-

-

5

V

Start Up Current

Ist

-

130

180

uA

Operating Supply Current

Iop

-

1.5

4

mA

Stand-by Current

Isb

-

200

370

uA

ON/OFF SECTION

On State Input Voltage

Von

-

2

-

5

V

Off Stage Input Voltage

Voff

-

-

-

0.7

V