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SM645 Folha de dados(PDF) 3 Page - Microsemi Corporation

Nome de Peças SM645
Descrição Electrónicos  SWITCHING REGULATOR POWER OUTPUT STAGES
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Fabricante Electrônico  MICROSEMI [Microsemi Corporation]
Página de início  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

SM645 Folha de dados(HTML) 3 Page - Microsemi Corporation

  SM645 Datasheet HTML 1Page - Microsemi Corporation SM645 Datasheet HTML 2Page - Microsemi Corporation SM645 Datasheet HTML 3Page - Microsemi Corporation SM645 Datasheet HTML 4Page - Microsemi Corporation  
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SM645/SM646/SM647
4/90 Rev 1.1 2/94
LINFINITY Microelectronics Inc.
Copyright
© 1994
11861 Western Avenue
∞ Garden Grove, CA 92841
3
(714) 898-8121
∞ FAX: (714) 893-2570
Current Delay Time
Current Rise Time
Voltage Rise Time
Voltage Storage Time
Voltage Fall Time
Current Fall Time
Efficiency (Note 5)
ns
ns
ns
ns
ns
ns
%
Test Conditions
Parameter
Units
ELECTRICAL CHARACTERISTICS (continued)
Note 4. In switching an inductive load, the current will lead the voltage on turn-on and lag the voltage on turn-off (see Figure 2). Therefore, Voltage
Delay Time (t
DV) ≅ tdi + tri and Current Storage Time (tsi) ≅ tsv + tfv .
Note 5. The efficiency is a measure of internal power losses and is equal to Output Power divided by Input Power. The switching speed circuit of Figure
1, in which the efficiency measured, is represenative of typical operating conditions for the SM600 series switching regulators.
Dynamic Characteristics (See Figures 1 & 2) (Notes 4 & 5)
AC TEST CIRCUIT AND SWITCHING TIME WAVEFORMS (Note 6)
FIGURE 1 - SM645/646/647 SWITCHING SPEED CIRCUIT
FIGURE 2 - SM645/646/647 SWITCHING WAVEFORMS
SM645
SM646
SM647
60
150
60
175
300
35
65
40
700
70
175
85
SG645/646/647
Min.
Typ. Max.
FIGURE 4 - NEGATIVE OUTPUT DOWN/UP (BUCK-BOOST) CONVERTER
FIGURE 3 - STEP DOWN (BUCK) CONVERTER
APPLICATION CIRCUITS
SM64X
SM64X


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