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LA7995M Folha de dados(PDF) 2 Page - Sanyo Semicon Device

Nome de Peças LA7995M
Descrição Electrónicos  Charge Pump Type DC-DC Converter
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Fabricante Electrônico  SANYO [Sanyo Semicon Device]
Página de início  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LA7995M Folha de dados(HTML) 2 Page - Sanyo Semicon Device

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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
CCop
Conditions
Current drain
Output voltage
Output voltage fluctuation
Output current
Oscillation frequency
I
IN
V
OUT
△V
OUT
I
OUT
f
I
O=1 mA, VCC=5V
I
O=1 mA, VCC=5V
I
O=1 mA, VIN=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
min
typ
max
Unit
Operating Conditions at Ta = 25
°C
Operating Characteristics at Ta = 25
°C
Note: The above specifications are measured with external capacitance provided by three 0.33
µF chip capacitors(C1,
C2, C3).
Charge Pump Principle
Figure 1 shows a charge pump circuit. Driving S1 and S2 with opposite phase produces a doubled voltage
A11009
VCC
S1
S2
VOUT≒2VCC
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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