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參數(shù)資料
| 型號(hào)： | XC9502B3AR |
| 廠商： | TOREX SEMICONDUCTOR LTD. |
| 英文描述： | 2ch. Step-up / down DC/DC Controller ICs |
| 中文描述： | 2通道。升壓/降壓DC / DC控制器芯片 |
| 文件頁數(shù)： | 8/43頁 |
| 文件大?。?/td> | 2485K |
| 代理商： | XC9502B3AR |
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8/43
XC9502
Series
V
OUT
(V)
1.0
1.5
1.8
2.0
2.2
The same method can be also adopted for channel two (output 2).
R
FB11
(k
30
220
220
330
390
)
R
FB12
(k
270
330
220
270
270
)
C
FB1
(pF)
430
62
62
39
33
V
OUT
(V)
2.5
2.7
3.0
3.3
5.0
R
FB11
(k
390
360
560
200
82
)
R
FB12
(k
220
180
240
75
18
)
C
FB1
(pF)
33
33
24
62
160
V
OUT
(V)
8.0
12.0
-
-
-
R
FB11
(k
120
160
-
-
-
)
R
FB12
(k
15
13
-
-
-
)
C
FB1
(pF)
100
82
-
-
-
<Setting of Output Voltage>
Output voltage can be set by adding external split resistors. Output voltage is determined by the following equation, based
on the values of R
FB11
(R
FB21
) and R
FB12
(R
FB22
). The sum of R
FB11
(R
FB21
) and R
FB12
(RF
B22
) should normally be 1M
less.
V
OUT
=0.9
(R
FB11
+R
FB12
) /R
FB12
The value of C
FB1
(C
FB2
), speed-up capacitor for phase compensation, should be
fzfb= 1 / (2
equal to 12kHz. Adjustments are required from 1kHz to 50kHz depending on the application, value of inductance (L), and
value of load capacity (C
L
).
or
C
FB1
R
FB11
)
which is
[Example of Calculation]
When R
FB11
=200k
and R
FB12
=75k
, V
OUT1
=0.9
(200k+75k) / 75k=3.3V.
[Typical Example]
[External Components]
Output 1 (Step-Up DC/DC controller)
Tr 1 :
* MOSFET
XP161A1355PR
Note: V
GS
Breakdown Voltage of this Tr. is 8V so
please be careful with the power supply voltage.
For 6V power supply voltage, XP161A1265PR
which V
GS
breakdown voltage is 12V is
recommended. V
ST1
of XP161A1355PR is 1.2V
(MAX.) and that of XP161A1265PR is 1.5V (MAX.)
(N-ch Power MOSFET, TOREX)
SD 1: MA2Q737 (Schottky, MATSUSHITA)
CMS02
(Schottky, TOSHIBA)
L 1:
10
H
(CDRH5D28, SUMIDA, FOSC = 500kHz)
15
H
(CDRH5D28, SUMIDA, FOSC = 300kHz)
22
H
(CDRH5D28, SUMIDA, FOSC = 180kHz)
C
L1
:
16V, 47
F
(Tantalum)
Increase capacity according to the equation below
when the step-up voltage ratio is large and output
current is high.
C=(C
L
standard value)
(I
OUT1
(mA)/300mA
V
OUT1
/V
IN
)
Tr :
R
B1
:
* NPN MOSFET 2SD1628 (SANYO)
500
( Adjust in accordance with load & Tr.'s HFE.)
Set according to the equation below:
R
B1
(V
IN
-0.7) x hFE / IC-R
EXTBH
2200pF (Ceramic)
Set according to the equation below:
C
B1
(2
x R
B2
x FOSC x 0.7)
C
B1
:
Output 2 (Step-Down DC/DC controller)
Tr 2 :
* MOSFET
XP162A12A6P (P-ch Power MOSFET, TOREX)
Note: V
GS
Breakdown Voltage of this Tr. is 12V
so please be careful with the power supply
voltage.
SD 2:
MA2Q737
CMS02
10
H
22
H
47
H
16V, 47
Increase capacity according to the equation below
when the step-up voltage ratio is large and output
current is high.
(Schottky, MATSUSHITA)
(Schottky, TOSHIBA)
(CDRH5D28, SUMIDA, FOSC = 500kHz)
(CDRH5D28, SUMIDA, FOSC = 300kHz)
(CDRH5D28, SUMIDA, FOSC = 180kHz)
F (Tantalum)
L 2:
CL1 :
C=(C
L
standard value)
(I
OUT2
(mA)/500mA
V
OUT2
/V
IN
Tr :
R
B1
:
* PNP MOSFET 2SA1213 (SANYO)
500
( Adjust in accordance with load & Tr.'s HFE.)
Set according to the equation below:
R
B2
(V
IN
-0.7) x hFE / IC-R
EXTBH
2200pF (Ceramic)
Set according to the equation below:
C
B2
(2
x R
B2
x FOSC x 0.7)
C
B1
:
OPERATIONAL EXPLANATION (Continued)
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