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參數(shù)資料
| 型號： | SM645K |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, MBCY4 |
| 封裝： | TO-3, 4 PIN |
| 文件頁數(shù)： | 3/4頁 |
| 文件大小： | 56K |
| 代理商： | SM645K |
SM645/SM646/SM647
4/90 Rev 1.1 2/94
Copyright
1994
L
IN
F
IN
ITY
Microelectronics Inc.
11861 Western Avenue
∞
∞
Garden Grove, CA 92841
(714) 898-8121
∞
FAX: (714) 893-2570
3
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
)
t
+ t
and Current Storage Time (t
)
t
+ t
.
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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