Datasheet > FOD2743A_08

FOD2743A_08

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		放大器
页数	文件大小	规格书
16页	322K
描述
Optically Isolated Error Amplifier

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FOD2743A_08 数据手册

Electrical Characteristics ^{(T = 25°C unless otherwise speciﬁed)}

Input Characteristics

Symbol

Parameter

LED Forward Voltage

Reference Voltage

Test Conditions

Device Min. Typ. Max. Unit

= 1mA, V

= V (Fig.1)

All

1.07

1.2

LED

COMP

= V

FOD2743A 2.482 2.495 2.508

FOD2743B 2.470 2.495 2.520

FOD2743C 2.450 2.500 2.550

REF

LED

(2)

Deviation of V

Temperature

Over T = -25°C to +85°C

All

4.5

REF (DEV)

REF

(2)

∆V

Ratio of V

to the Output of the

Error Ampliﬁer

Variation

= 1mA ∆V

∆V

= 10V to V

REF

All

-0.4

-0.3

-2.7

-2.0

mV/V

REF

LED

COMP

= 36V to 10V

Feedback Input Current I

= 1mA, R = 10kΩ (Fig. 3)

All

µA

REF

LED

(2)

Deviation of I

Temperature

Over T = -25°C to +85°C

1.2

REF (DEV)

REF

Minimum Drive Current

= V (Fig.1)

All

0.45

1.0

µA

LED (MIN)

COMP

Off-State Error

= 37V, V = 0 (Fig. 4)

0.001

(OFF)

LED

Ampliﬁer Current

Error Ampliﬁer Output

Impedance

= V , I = 1mA to 20mA,

REF LED

All

0.15

0.5

Ω

OUT

COMP

(3)

f ≥ 1.0 kHz

Output Characteristics

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Collector Dark Current

= 10V (Fig. 5)

CEO

Emitter-Collector Voltage Breakdown

Collector-Emitter Voltage Breakdown

I = 100µA

ECO

CEO

I = 1.0mA

100

Transfer Characteristics

Parameter

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

CTR

Current Transfer Ratio

= 1mA, V

= V ,

100

LED

COMP

= 5V (Fig. 6)

Collector-Emitter Saturation

Voltage

= 1mA, V

= V

0.4

CE (SAT)

LED

COMP

FB,

I = 0.1mA (Fig. 6)

Notes:

2. The deviation parameters V

and I

are defined as the differences between the maximum and

REF(DEV)

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

reference input voltage, ∆V , is defined as:

REF

{V_REF(DEV)/V_REF(T_A= 25°C)} × 10⁶

∆V_REF(ppm/°C) = ----------------------------------------------------------------------------------------------------

∆T_A

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

3. The dynamic impedance is defined as |Z

| = ∆V

/∆I

. When the device is operating with two external

OUT

COMP LED

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

∆V R1

Z_{OUT, TOT}= ------- ≈ Z_OUT× 1 + -------

∆I

FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1

www.fairchildsemi.com

1 2 345 6 7...16

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