FOD2742B Fairchild Optoelectronics Group, FOD2742B Datasheet
FOD2742B
Specifications of FOD2742B
FOD2742BFS
FOD2742B_NL
FOD2742B_NL
Available stocks
Related parts for FOD2742B
FOD2742B Summary of contents
Page 1
... ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1 Description The FOD2742 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. It comes in 3 grades of reference voltage tolerance = 2%, 1%, and 0 ...
Page 2
... Typical Application FAN4803 PWM V 1 Control ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1 Functional Description Not connected Phototransistor Collector Phototransistor Emitter Not connected Ground Error Amplifier Compensation. This pin is the output of the error amplifier.* Voltage Feedback. This pin is the inverting input to the error amplifi ...
Page 3
... Total Power Dissipation Notes: 1. Derate linearly from 25° rate of 2.42mW/°C 2. Derate linearly from 25° rate of 1.42mW/°C. 3. Derate linearly from 25° rate of 2.42mW/°C. ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0 25°C unless otherwise specified) A Parameter -40 to +125 ...
Page 4
... A 2. The dynamic impedance is defined as |Z resistors (see Figure 2), the total dynamic impedance of the circuit is given by ------- - Z 1 OUT, TOT OUT I ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0 25°C unless otherwise specified) A Test Conditions I = 10mA (Fig. 1) LED COMP 10mA (Fig ...
Page 5
... Vcm, to assure that the output will remain high. Common mode transient immunity at output low is the maximum tolerable (negative) dVcm/dt on the trailing edge of the common pulse signal,Vcm, to assure that the output will remain low. ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0 25°C unless otherwise specified) (Continued) A ...
Page 6
... REF 5 Figure (min) Test Circuit REF F, LED I (LED REF Figure 3. I Test Circuit REF Figure 5. I Test Circuit CEO ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0 Figure CEO (LED COMP R2 V REF Test Circuit REF/ COMP I (OFF (LED) ...
Page 7
... Test Circuits (Continued + OUT 2.2k V OUT ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0 0 Figure 7. Frequency Response Test Circuit VCM _ + 10V P-P Figure 8. CMH and CML Test Circuit 0.47V = www.fairchildsemi.com ...
Page 8
... T – AMBIENT TEMPERATURE ( C) A Fig. 12 Off-State Current vs. Ambient Temperature V = 37V LED 100 10 1 -40 - – AMBIENT TEMPERATURE ( C) A ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1 1.0 0.5 0.0 -0.5 -1 100 100 8 Fig. 9b LED Current vs. Cathode Voltage ...
Page 9
... I – FORWARD CURRENT (mA) LED Fig. 18 Collector Current vs. Collector Voltage – COLLECTOR-EMITTER VOLTAGE (V) CE ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1 (Continued 100 0.26 0.24 0.22 0.20 0.18 0.16 0.14 0.12 0.10 100 -0.22 -0. 20mA LED -0.26 -0.28 -0.30 -0 ...
Page 10
... Typical Performance Curves ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1 (Continued) Fig. 20 Voltage Gain vs. Frequency 10V 10mA 100 - 500 -10 - 100 FREQUENCY (kHz) 10 1000 www.fairchildsemi.com ...
Page 11
... A R TOP ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1 Compensation The compensation pin of the FOD2742 provides the opportunity for the designer to design the frequency response of the converter. A compensation network may be placed between the COMP pin and the FB pin. In typical low-bandwidth systems, a 0.1µ ...
Page 12
... Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1 8 0.164 (4.16) 0.144 (3.66) 1 ...
Page 13
... Ordering Information Option Order Entry Identifi R2V Marking Information Definitions ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1 V VDE 0884 R2 Tape and reel (2500 units per reel) R2V VDE 0884, Tape and reel (2500 units per reel) 1 2742A Fairchild logo ...
Page 14
... Carrier Tape Specifications 3.50 0.20 0.30 MAX 8.3 0.10 0.1 MAX User Direction of Feed Dimensions in mm ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1 8.0 0.10 2.0 0.05 4.0 0.10 6.40 0.20 14 Ø1.5 MIN 1.75 0.10 5.5 0.05 12.0 0.3 5 ...
Page 15
... Maintained Above (T L Peak Body Package Temperature Time (t ) within 5°C of 260°C P Ramp-down Rate (T Time 25°C to Peak Temperature ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1 Max. Ramp-up Rate = 3°C/S Max. Ramp-down Rate = 6°C/S Tsmax Preheat Area Tsmin t s 120 240 Time 25° ...
Page 16
... Datasheet Identification Product Status Advance Information Formative / In Design Preliminary First Production No Identification Needed Full Production Obsolete Not In Production ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1 ® PowerTrench ® PowerXS™ SM Programmable Active Droop™ ® QFET QS™ Quiet Series™ ...