TPS5904

TPS5904, TPS5904A OPTOISOLATED FEEDBACK AMPLIFIERS D TL1431 Precision Programmable Reference (2.5 V) and an Optocoupler in a Single Package D Reference Voltage Tolerance − TPS5904 0.8% − TPS5904A 0.4% D Controlled Optocoupler CTRs: − TPS5904 100% to 400% − TPS5904A 150% to 300% D High Withstand Voltage (WTV), 7500 V Peak for 1 Minute D Safety Regulatory Approvals − UL . . . File Number E65085 − FIMKO, SEMKO, NEMKO, DEMKO − EN60065/IEC 65 − EN60950/IEC 950 − VDE 0884, Level 4 (6000-V Insulation) SOES016D − MAY 1995 − REVISED JANUARY 1998 DCS OR P PACKAGE (TOP VIEW) LED COMP GND FB 1 2 3 4 8 NC 7C 6E 5 NC NC − No internal connection description The TPS5904 and TPS5904A optoisolated feedback amplifiers consist of the industry standard TL1431 precision programmable reference and an optocoupler. Reference-voltage tolerance for the TPS5904 is 0.8%, and for the TPS5904A, 0.4%. The devices are primarily intended for use as the error-amplifier/reference/ isolation-amplifier element in isolated ac-to-dc power supplies and dc/dc converters. The optocoupler is a gallium-arsenide (GaAs) light-emitting diode that emits at a wavelength of 940 nm, combined with a silicon phototransistor. The current transfer ratio (CTR) ranges from 100% to 400% in the standard version. The TPS5904A version with a 150%-to-300% CTR is available for higher-performance applications. When using the TPS5904 or TPS5904A, power-supply designers can reduce component count and save space in tightly packaged de...