FOD2712A 查看數據表（PDF） - Fairchild Semiconductor

零件编号

产品描述 (功能)

生产厂家

FOD2712A

Optically Isolated Error Amplifier

Fairchild Semiconductor 

Electrical Characteristics (VCC = 12V, TA = 25°C unless otherwise specified)

Input Characteristics

Symbol

Parameter

Test Conditions

Min. Typ. Max. Unit

VF

LED Forward Voltage

ILED = 10mA, VCOMP = VFB

(Fig.1)

1.5 V

VREF

Reference Voltage

-40°C to +85°C

25°C

VCOMP = VFB, ILED = 10mA

(Fig.1)

1.221

1.259 V

1.228 1.240 1.252

VREF (DEV) Deviation of VREF over temperature

See Note 1

TA = -40 to +85°C

4

12 mV

∆VREF

∆VCOMP

Ratio of Vref Variation to the Output of the ILED = 10 mA,

Error Amplifier

VCOMP = VREF to 12V

(Fig. 2)

-1.5 -2.7 mV/V

IREF Feedback Input Current

ILED = 10mA, R1 = 10kΩ

(Fig. 3)

0.15 0.5 µA

IREF (DEV) Deviation of IREF Over Temperature

See Note 1

TA = -40 to +85°C

0.15 0.3 µA

ILED (MIN)

I(OFF)

|ZOUT|

Minimum Drive Current

Off-state Error Amplifier Current

Error Amplifier Output Impedance

See Note 2

VCOMP = VFB (Fig.1)

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

VCOMP = VFB,

ILED = 0.1mA to 15mA,

f < 1kHZ

55 80 µA

0.001 0.1 µA

0.25

Ω

Notes:

1. 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.

2. 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

©2010 Fairchild Semiconductor Corporation

FOD2712A Rev. 1.0.1

4

www.fairchildsemi.com

Share Link: