MAX845ESA Maxim Integrated Products, MAX845ESA Datasheet
MAX845ESA
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MAX845ESA Summary of contents
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... Ultra-Low Input Supply Current Ripple Single +5V or +3.3V Supply 5µW Low-Power Shutdown Mode 8-Pin SO and µMAX Packages Low Output Ripple Permits Miniature Output Capacitors _______________Ordering Information PART MAX845C/D MAX845ESA MAX845EUA *Contact factory for dice specifications. ___________________Pin Configuration TOP VIEW C1 OUTPUT CR1 5V @ 150mA ...
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Isolated Transformer Driver for PCMCIA Applications ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ) ...............................................-0.3V to +7V CC Control Input Voltage (SD, FS) ...................-0. Peak Output Switch Current (D1, D2) ......................................1A Output Switch Voltage (D1, D2) .............................................12V Average Output ...
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Operating Characteristics ( Typical Operating Circuit , 0.1µ 0.33µ Halo TGM-010P3, CR1 = CR2 = MBR0520 +25°C, unless otherwise noted.) A OUTPUT ...
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Isolated Transformer Driver for PCMCIA Applications ____________________________Typical Operating Characteristics (continued) ( Typical Operating Circuit , 0.1µ 0.33µ Halo TGM-010P3, CR1 = CR2 = MBR0520 ...
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MAX845 FS OSC FREQUENCY SELECT 400kHz/ 700kHz Figure 2. Detailed Block Diagram _______________Detailed Description The MAX845 is a transformer driver specifically designed to provide isolated power for PCMCIA and other height- and/or space-sensitive applications. It drives a ...
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Isolated Transformer Driver for PCMCIA Applications 0.1µ 1CT:1.3CT OFF MAX845 GND1 GND2 FREQUENCY SELECT 2 7 Figure Isolated 5V Application ...
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0.33µ GND1 2 Figure 5. Low-Noise Supply Isolated Data Conversion Almost any serial-interface device is a candidate for operation across an isolation barrier; Figure 6 illustrates one example. The MAX176 ...
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Isolated Transformer Driver for PCMCIA Applications 78L05 10µF ISO 5V ISO -12V 10µF MAX176 0.1µ ANALOG AIN CONVST INPUT 3 6 VREF CLOCK 4 5 0.1µF GND DATA 10µF 0.1µF 10µF SIGNAL ...
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TELEPHONE SUBSCRIBER LINE 6. 100k 2N3906 100k 2M 100k 680k 100k Figure 7. 5V from Telephone-Subscriber Line MAX845 GND1 GND2 0.1V to ...
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Isolated Transformer Driver for PCMCIA Applications 0.1µ MAX845 ON / OFF GND1 GND2 74HC04 390 DI * 74HC04 390 DE 3.3k * 74HC04 RO * ...
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0.1µF 5 N.C. MAX845 OFF SD GND1 GND2 2 *74HC04 390 T1 IN 74HC04 390 T2 IN 74HC04 390 T3 IN 74HC04 390 T4 IN 74HC04 390 3.3k 74HC04 ...
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Isolated Transformer Driver for PCMCIA Applications ______________Component Selection The MAX845 drives any transformer that has a center- tapped primary and a saturation rating of at least 5V-µs (ET product) per side. The oscillator frequency varies linearly with V . The ...
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Use a test winding to measure ET product (if using an ungapped toroid) and/ Determine the number of turns required for the pri- mary winding. For an ungapped toroid, ET product from center-tap to D1 must ...
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Isolated Transformer Driver for PCMCIA Applications R S SIMPLE SHUNT ZENER R S 22k TL431 22k PROGRAMMABLE-IC SHUNT REGULATOR (STAND ALONE 22k TL431 22k PROGRAMMABLE-IC SHUNT REGULATOR WITH DISCRETE PNP Figure 12. Shunt-Regulator Circuits Output Regulator Since ...
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Table 2. Rectifier Topology Trade-Offs TOPOLOGY ADVANTAGE • Only 3 external 2-Diode components Push/Pull • Low output ripple (Figure 11a) • Single diode drop • Simpler transformer 4-Diode winding requirements Bridge (Figure 11b) • Low output ripple Voltage • Fewest ...
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Isolated Transformer Driver for PCMCIA Applications ________________________________________________________Package Information 16 ______________________________________________________________________________________ ...