90VAC 264VAC 47Hz 63Hz Figure National Semiconductor Application
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90VAC 264VAC 47Hz 63Hz Figure
National Semiconductor Application Note 1061 Cronk 1998
UL1950CSA950EN60950 (IEC950) (SEVL: Safe Extra Voltage) (Figure
FIGURE Typical Power Supply Requirement
AN-1061
FIGURE Power Supply Solution Using Isolation Transformer Low-Voltage DC/DC Converters
National Semiconductor Corporation
AN012896-03-JP
AN-1061
FIGURE Line Rectification Methods Figure 12.5) 120VAC O.H.Shade 1943 Proceedings Institute Radio Engineers "Analysis Rectifier Operation" Shade
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DC/DC
FIGURE DC/DC Converter Options Figure Figure DC/DC) Figure Figure 120Hz 60Hz 132VAC PLOSS IGND (VIN VOUT) IGND LM3940 3.3V 5.5VDC 2.8W (IGND 110mA) LP2960 0.5ADC 5.0V 7.3VDC 1.3W (IGND 21mA) LM2952 0.25ADC 15.9VDC 1.3W (IGND 21mA) 8.8W 5.4W 14.2W 3.8W 14.9W 3.3V 3.3V
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DC/DC
FIGURE Power Supply Solution Using Linear Regulators
FIGURE Power Supply Solution Using Step-Down Switching Regulators Figuer 120Hz (PCB) SIMPLE SWITCHER DC/DC "Switchers Made Simple®" 4.2.1) http://www.national.com/jpn
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Figure
FIGURE 3-Output Flyback Converter Provides Power Modem SIMPLE SWITCHER® "Switchers Made Simple®" DC/DC Figure DC/DC J.Marrero 1995 PCIM Proceedings "Improving Cross Regulation Multiple Output Flyback Converters"
FIGURE Schematic Power Supply Figure
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CIN2 COUT1 COUT2 COUT3 270.00 100.00 2.70 (x3) 330.00 270.00 3.00 330.00 Schottky Schottky Schottky 20.00V Ultrafast 5.00A National (Software provides detailed specification Nichicon Nichicon Nichicon Nichicon Dale Motorola Motorola Motorola Motorola Motorola UPL1J271MRH SR595C104KAA UPL1V272MRH UPL1V331MPH UPL1V271MPH CCF-07302J TAPA334K035R MBR745 MBR1100 MBR1100 SA20A MUR120 LM2587T-5
FIGURE Component Summary Circuit Figure Generated Switchers Made Simple
Simple Switcher 60Hz 105VAC) 60Hz 60Hz
100VAC) (Figure (turn
(turn off) 100VAC Figure LM6511 50nA 200nA 200nA
60Hz 108VAC)
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AN-1061
(turn 108VAC (turn off) 100VAC (turn (turn off)
FIGURE Hysteresis Controls Turn-on Turn-off Thresholds Undervoltage Circuit
FIGURE Undervoltage Lockout Circuit with Hysteresis
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RhR1R2
(PFC)
SIMPLE SWITCHER®
DC/DC SIMPLE SWITCHER® DC/DC Figure SIMPLE SWITCHER® SIMPLE SWITCHER® "Switchers Made Simple®" SIMPLE SWITCHER® "Switchers Made Simple®" (1998
FIGURE Linear Regulator Solutions Switching Regulator Solutions Figure LP2980/2 50mA LP2950/51/81 100mA LP2952/53/54/57 250mA LP2960 500mA LM3940
WEBENCH®
WEBENCH® (webench.national.com/ jpn) WEBENCH WEBENCH WEBENCH WebSIMTM/WEBENCH® Electrical Simulator WebTHERM
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SIMPLE SWITCHER®
LM2825 1.0A 4.75 DC/DC ON/OFF SO-8 400kHz ON/OFF SO-8 400kHz ON/OFF SO-8TTL ON/OFF SO-8TTL ON/OFF SO-8TTL ON/OFF ON/OFF ON/OFF SO-8 ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF
LM2671 LM2672 LM2674 LM2675 LM267X LM2594 LM2595 LM2596 LM2597 LM2598 LM2599 LM2574 LM2574HV LM2575 LM2575HV LM2576 LM2576HV LM2585 LM2586 LM2587 LM2588 LM2577
0.5A 1.0A 0.5A 1.0A 3.0A, 5.0A 0.5A 1.0A 3.0A 0.5A 1.0A 3.0A 0.5A 1.0A 3.0A
3.0A 3.0A 5.0A 5.0A 3.0A
ON/OFF200kHz ON/OFF200kHz
FIGURE SIMPLE SWITCHER® Power Converters
135-0042 2-17-16 TEL.(03)5639-7300
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