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參數(shù)資料
| 型號： | LA7995M |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | Charge Pump Type DC-DC Converter |
| 中文描述： | 電荷泵型DC - DC變換器 |
| 文件頁數(shù)： | 2/5頁 |
| 文件大小： | 38K |
| 代理商： | LA7995M |
71598RM(KI) No. 5920-2/5
Ratings
Unit
Symbol
Parameter
Recommended supply voltage
Operating supply voltage range
5
4.75 to 5.25
V
V
V
CC
V
CC
op
Conditions
Current drain
Output voltage
Output voltage fluctuation
Output current
Oscillation frequency
Note: The above specifications are measured with external capacitance provided by three 0.33
μ
F chip capacitors(C1,
C2, C3).
I
IN
V
OUT
V
OUT
I
OUT
f
I
O
=1 mA, V
CC
=5V
I
O
=1 mA, V
CC
=5V
I
O
=1 mA, V
IN
=4.75 to 5.25V
V
O
=29V
C
OSC
=150pF
19
29
1.5
35
24
30.7
1.0
1.7
50
29
32
1.5
65
mA
V
V
mA
KHz
Parameter
Symbol
Conditions
Ratings
typ
min
max
Unit
Operating Conditions
at Ta = 25
°
C
Operating Characteristics
at Ta =
25
°
C
Charge Pump Principle
Figure 1 shows a charge pump circuit. Driving S1 and S2 with opposite phase produces a doubled voltage
Figrue 1 Chrage pump circuit
In order to supply 30V from 5V, the LA7995M uses three charge pump circuits in series to produce a step-up factor of 2
x 2 x 2 = 8.
LA7995M
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