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參數資料
| 型號： | 78S40 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 抗輻射高效，5安培開關穩壓器 |
| 文件頁數： | 4/8頁 |
| 文件大小： | 124K |
| 代理商： | 78S40 |
μ
A78S40
4
MOTOROLA ANALOG IC DEVICE DATA
Figure 1. Output Switch On/Off Time
versus Oscillator Timing Capacitor
Figure 2. Standby Supply Current
versus Supply Voltage
Figure 3. Emitter–Follower Configuration
Output Switch Saturation Voltage
versus Emitter Current
CT, OSCILLATOR TIMING CAPACITOR (nF)
0.1
1.0
10
100
,
s
μ
o
t
VCC = 5.0 V
Ipk(sense) = VCC
Pin 10 = Gnd
Pin 9 = Vref
ton
toff
VCC, SUPPLY VOLTAGE (V)
0
5.0
10
15
20
25
30
35
40
,
C
I
CT = 0.001
μ
F
Ipk(sense) = VCC
Pin 3 = Gnd
IE, EMITTER CURRENT (A)
,
C
V
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
VCC = 5.0 V
Pins 14, 15, 16 = VCC
Pins 10, 12 = Gnd
Pin 9 = Vref
IC, COLLECTOR CURRENT (A)
,
C
V
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
VCC = 5.0 V
Pin 14 = VCC
Pins 3, 10, 12 = Gnd
Pin 9 = Vref
Darlington Connection
Figure 4. Common–Emitter Configuration
Output Switch Saturation Voltage
versus Collector Current
1000
100
10
1.0
3.2
2.4
1.6
0.8
0
1.6
1.5
1.4
1.3
1.2
1.1
1.0
1.2
1.0
0.8
0.6
0.4
0.2
0
Forced Beta = 20
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