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AP1551 Fiches technique(PDF) 4 Page - Anachip Corp

No de pièce AP1551
Description  150KHz, Dual Channel 2A PWM Buck DC/DC Converter
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Fabricant  ANACHIP [Anachip Corp]
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Logo ANACHIP - Anachip Corp

AP1551 Fiches technique(HTML) 4 Page - Anachip Corp

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AP1551
150KHz, Dual Channel 2A PWM Buck DC/DC Converter
Anachip Corp.
www.anachip.com.tw
Rev. 1.0 Nov 17, 2004
4/8
Electrical Characteristics (Continued)
Symbol
Parameter
Conditions
Typ.
Limit
Unit
VFB1
Output
Feedback
4.5V < VIN < 22V
0.2A < ILOAD < 2A
VOUT programmed for
3V
1.23
1.193/1.18
1.267/1.28
V
VMIN
VMAX
AP1551-channel 1
η
Efficiency
VIN = 12V, ILOAD=2A
76
%
VFB2
Output
Feedback
4.5V < VIN < 22V
0.2A < ILOAD < 2A
VOUT programmed for
3V
1.23
1.193/1.18
1.267/1.28
V
VMIN
VMAX
AP1551-channel 2
η
Efficiency
VIN = 12V, ILOAD=2A
76
%
Specifications with boldface type are for full operating temperature range, the other type are for TJ=25ºC.
Typical Application Circuit
4
13
8
9
7
10
6
11
5
12
3
14
2
15
1
16
GND2
GND2
SD2
V
IN2
SD1
V
IN1
GND1
GND1
GND1
GND1
V
OUT1
FB1
V
OUT2
FB2
GND2
GND2
OFF ON
OFF ON
12V DC input
Cin
820uF
2.5V Vout1
3.3V Vout2
Cout1
470uF
Cout2
470uF
33uH
1.1k
1k
33uH
1.8k
1k
R1
R2
R3
R4
Vout1 =VFB× (1 +
R2
R1 );
Vout2 =VFB× (1 +
R4
R3 );
VFB = 1.235V
R2 = R4 = 1K ~ 3K


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