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KB3440EMS Scheda tecnica(PDF) 16 Page - Kingbor Technology Co

Il numero della parte KB3440EMS
Spiegazioni elettronici  Micropower Synchronous Buck-Boost DC/DC Converter
PDF  20 Pages
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Produttore elettronici  KINGBOR [Kingbor Technology Co]
Homepage  http://www.kingbor.com
Logo KINGBOR - Kingbor Technology Co

KB3440EMS Scheda tecnica(HTML) 16 Page - Kingbor Technology Co

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16
Low Profile (<1.1mm) Li-Ion to 3.3V at 200mA Converter
SW1
VIN
SHDN/SS
MODE/SYNC
RT
SW2
VOUT
FB
VC
GND
3
7
8
2
1
4
6
9
10
5
kB3440
L1
4.7
µH
R1
340k
R2
200k
R3
15k
RT
30.1k
C1: TAIYO YUDEN JMK212BJ475MG
C2: TAIYO YUDEN JMK212BJ475MG
L1: COILCRAFT LPO1704-472M
*1 = Burst Mode OPERATION
0 = FIXED FREQUENCY
fOSC = 2MHz
C1
4.7
µF
Li-Ion
VIN = 2.5V TO 4.2V
*
+
C4
1.5nF
C2
4.7
µF
VOUT
3.3V
200mA
OUTPUT CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
0
1
Burst Mode
OPERATION
VIN = 2.5V
VIN = 3.3V
VIN = 4.2V
Efficiency
3-Cell to 5V Boost Converter with Output Disconnect
SW1
VIN
SHDN/SS
MODE/SYNC
RT
SW2
VOUT
FB
VC
GND
3
7
8
2
1
4
6
9
10
5
kB3440
L1
10
µH
R1
619k
R2
200k
RT
60.4k
C1: TAIYO YUDEN JMK212BJ106MG
C2: TAIYO YUDEN JMK325BJ226MM
D1: ON SEMICONDUCTOR MBRM120T3
L1: SUMIDA CDRH4D28-100
*1 = Burst Mode OPERATION
0 = FIXED FREQUENCY
**
LOCATE COMPONENTS AS
CLOSE TO IC AS POSSIBLE
C1
10
µF
C3
0.1
µF
3
CELLS
R4 1M
VIN = 2.7V TO 4.5V
*
SD
C4
1.5nF
15k
fOSC = 1MHz
C2**
22
µF
VOUT
5V
300mA
+
D1**
OUTPUT CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
0
1
Burst Mode
OPERATION
VIN = 2.7V
fOSC = 1MHz
VIN = 3.6V
VIN = 4.5V
3-Cell to 5V Boost Efficiency
kB3440
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
TYPICAL APPLICATION



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