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參數(shù)資料
| 型號(hào)： | PT6103N |
| 英文描述： | SMPS Controller |
| 中文描述： | 開關(guān)電源控制器 |
| 文件頁數(shù)： | 3/4頁 |
| 文件大?。?/td> | 303K |
| 代理商： | PT6103N |
For assistance or to order, call
(800) 531-5782
3
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902
http://www.powertrends.com
A p p l i c a t i o n
N o t e s
PT6100/6120/6210/6220/6300/6320 Series
More Application Notes
Adjusting the Output Voltage of the Wide Input
Range Bus ISRs
The output voltage of the Power Trends’ Wide Input Range
Series ISRs may be adjusted higher or lower than the factory
trimmed pre-set voltage with the addition of a single external
resistor. Table 1 accordingly gives the allowable adjustment
range for each model for either series as V
a
(min) and V
a
(max).
Adjust Up:
adding a resistor R2, between pin 12 (V
o
adjust) and pins 5-8
(GND).
An increase in the output voltage is obtained by
Adjust Down:
and pins 9-11(V
out
).
Add a resistor
(R1)
, between pin 12 (V
o
adjust)
Refer to Figure 1 and Table 2 for both the placement and value
of the required resistor; either
(R1)
or R2 as appropriate.
Notes:
1. Use only a single 1% resistor in either the
(R1)
or R2 loca-
tion. Place the resistor as close to the ISR as possible.
2. Never connect capacitors from V
o
adjust to either GND or
V
out
. Any capacitance added to the V
o
adjust pin will affect
the stability of the ISR.
4. Adjustments to the output voltage may place additional
limits on the maximum and minimum input voltage for the
part. The revised maximum and minimum input voltage
limits must comply with the following requirements. Note
that the minimum input voltage limits are also model depen-
dant.
V
in
(max)
= (8 x V
a
)V or
*
30/38V, whichever is less.
PT6x
0
x/PT6x
1
x series:
V
in
(min)
= (V
a
+ 4)V or 9V whichever is highest.
PT6x
2
x series:
V
in
(min)
= (V
a
+ 2.5)V or 7.5V whichever is highest.
*
Limit is 30V when inhibit function is used.
Figure 1
The values of
(R1)
[adjust down], and R2 [adjust up], can
also be calculated using the following formulae.
R
o
(V
a
– 1.25)
V
o
– V
a
(R1)
=
k
1.25 R
o
V
a
– V
o
k
R2
=
Where: V
o
= Original output voltage
= Adjusted output voltage
R
o
= The resistance value fromTable 1
V
a
Table 1
ISR ADJUSTMENT RANGE AND FORMULA PARAMETERS
PT6102
PT6122
PT6213
PT6223
PT6303
PT6323
1Adc Rated
PT6101
PT6121
PT6103
2Adc Rated
PT6212
PT6222
PT6302
PT6322
PT6214
3Adc Rated
PT6304
Vo (nom)
Va (min)
Va (max)
Ro (k
)
3.3
1.89
6.07
66.5
5.0
1.88
11.25
150.0
5.0
2.18
8.5
90.9
12.0
2.43
22.12
243.0
R2
Adjust Up
C1
1
μ
F Ceramic
(Optional)
C2
100
μ
F
(Req'd)
Vo
COM
COM
Vin
+
(R1)
Adj Down
PT6100/6200/6300
9,10,11
12
5,6,7,8
2,3,4
Vin
Vo
GND
Vo(adj)
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