FOD2743A

Maximum Collector Emitter Saturation Voltage : 0.4 V
Isolation Voltage : 5000 Vrms
Minimum Operating Temperature : - 40 C
Maximum Collector Current : 50 mA
Maximum Operating Temperature : + 85 C
Packaging : Bulk
Input Type : DC
Maximum Collector Emitter Voltage : 70 V
Package / Case : PDIP-8
Maximum Power Dissipation : 145 mW
Current Transfer Ratio : 100 %
Maximum Forward Diode Voltage : 1.2 V


Features:

Optocoupler, precision reference and error amplifier in single package
2.5V reference
CTR 50% to 100% at 1mA
5,000V RMS isolation
UL approval E90700, Vol. 2
CSA approval 1296837
VDE approval pending
BSI approval pending
Low temperature coefficient 50 ppm/°C max
FOD2743A: tolerance 0.5%
FOD2743B: tolerance 1%
FOD2743C: tolerance 2%




Application

Power supplies regulation
DC to DC converters




Pinout






Specifications

Parameter	Symbol	Value	Units
Storage Temperature	TSTG	-40 to +125	°C
Operating Temperature	TOPR	-25 to +85	°C
Reflow Temperature Profile (refer to fig. 21)
Input Voltage	VLED	37	V
Input DC Current	ILED	20	mA
Collector-Emitter Voltage	VCEO	70	V
Emitter-Collector Voltage	VECO	7	V
Collector Current	IC	20	mA
Input Power Dissipation (note 1)	PD1	145	mW
Transistor Power Dissipation (note 2)	PD2	85	mW
Total Power Dissipation (note 3)	PD3	145	mW

Description

The FOD2743 Optically Isolated Amplifier consists of the popular KA431 precision programmable shunt reference and an optocoupler. The optocoupler is a gallium arsenide (GaAs) light emitting diode optically coupled to a silicon phototransistor. FOD2743 comes in 3 grades of reference voltage tolerance = 2%, 1%, and 0.5%.

The Current Transfer Ratio (CTR) ranges from 50% to 100%. FOD2743 also has an outstanding temperature coefficient of 50 ppm/°C. It is primarily intended for use as the error amplifier/ reference voltage/optocoupler function in isolated ac to dc power supplies and dc/dc con- verters.

When using the FOD2743, power supply designers can reduce the component count and save space in tightly packaged designs. The tight tolerance reference eliminates the need for adjustments in many applications. The FOD2743 comes in a 8-pin dip white package.

Parameters:

Technical/Catalog Information	FOD2743A
Vendor	Fairchild Optoelectronics Group
Category	Isolators
Isolation Voltage	5000Vrms
Input Type	DC
Output Type	Transistor
Current - Output/Channel	50mA
Voltage - Output	70V
Vce Saturation (Max)	400mV
Current Transfer Ratio (Min)	50% @ 1mA
Mounting Type	Through Hole
Package / Case	8-DIP
Packaging	Tube
Number of Circuits	1 - Single
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	FOD2743A FOD2743A