FOD2711 查看數據表（PDF） - Fairchild Semiconductor

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FOD2711

Optically Isolated Error Amplifier

Fairchild Semiconductor 

Electrical Characteristics (TA = 25°C unless otherwise specified)

Input Characteristics

Symbol

Parameter

VF

VREF

LED Forward Voltage

Reference Voltage

-40°C to +85°C

25°C

VREF (DEV) Deviation of VREF Over

Temperature(4)

∆VREF /

∆VCOMP

Ratio of Vref Variation

to the Output of the Error

Amplifier

IREF

IREF (DEV)

Feedback Input Current

Deviation of IREF Over

Temperature(4)

ILED (MIN)

I(OFF)

Minimum Drive Current

Off-State Error Amplifier

Current

| ZOUT | Error Amplifier Output

Impedance(5)

Test Conditions

ILED = 10mA, VCOMP = VFB (Fig. 1)

VCOMP = VFB, ILED = 10mA (Fig.1)

TA = -40 to +85°C

Min. Typ.* Max. Unit

1.5 V

1.221

1.259 V

1.228 1.240 1.252

4

12 mV

ILED = 10 mA, VCOMP = VREF to 12V

(Fig. 2)

-1.5 -2.7 mV/V

ILED = 10mA, R1 = 10kΩ (Fig. 3)

TA = -40°C to +85°C

VCOMP = VFB (Fig. 1)

VLED = 6V, VFB = 0 (Fig. 4)

VCOMP = VFB, ILED = 0.1mA to 15mA,

f<1 kHZ)

0.15 0.5 µA

0.15 0.3 µA

55 80 µA

0.001 0.1 µA

0.25

Ω

Output Characteristics

Symbol

Parameter

ICEO

BVECO

BVCEO

Collector Dark Current

Emitter-Collector Voltage Breakdown

Collector-Emitter Voltage Breakdown

Test Conditions

VCE = 10V (Fig. 5)

IE = 100µA

IC = 1.0mA

Min.

7

70

Typ.

Max.

50

Unit

nA

V

V

Transfer Characteristics

Symbol Parameter

CTR Current Transfer Ratio

VCE (SAT) Collector-Emitter Saturation

Voltage

Test Conditions

ILED = 10mA, VCOMP = VFB,

VCE = 5V (Fig. 6)

ILED = 10mA, VCOMP = VFB,

IC = 2.5mA (Fig. 6)

Min.

100

Typ.

Max.

200

Unit

%

0.4

V

Notes:

4. The deviation parameters VREF(DEV) and IREF(DEV) are defined as the differences between the maximum and

minimum values obtained over the rated temperature range. The average full-range temperature coefficient of the

reference input voltage, ∆VREF, is defined as:

∆VREF

( ppm/°C )

=

{----V----R----E---F---(--D----E----V---)--/--V----R----E---F----(--T----A-----=------2---5----°--C-----)--}-----×----1----0---6-

∆TA

where ∆TA is the rated operating free-air temperature range of the device.

5. The dynamic impedance is defined as |ZOUT| = ∆VCOMP / ∆ILED. When the device is operating with two external

resistors (see Figure 2), the total dynamic impedance of the circuit is given by:

ZOUT, TOT = ∆--∆---V-I- ≈ ZOUT ×

1 + R-----1--

R2

©2003 Fairchild Semiconductor Corporation

FOD2711 Rev. 1.0.1

4

www.fairchildsemi.com

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