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參數(shù)資料
| 型號(hào)： | PT4856N |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 3-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封裝： | SIP-26/25 |
| 文件頁(yè)數(shù)： | 4/15頁(yè) |
| 文件大小： | 268K |
| 代理商： | PT4856N |
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For technical support and more information, see inside back cover or visit www.ti.com
Application Notes continued
3.0
(2.4)k
3.05
(4.7)k
3.1
(8.3)k
3.15
(14.2)k
3.2
(26.0)k
3.25
(61.3)k
3.3
3.35
216.0k
3.4
106.0k
3.45
68.7k
3.5
50.3k
3.55
39.2k
3.6
31.8k
4.5
(15.0)k
4.6
(21.2)k
4.7
(31.6)k
4.8
(52.4)k
4.9
(115.0)k
5.0
5.1
120.0k
5.2
57.4k
5.3
36.6k
5.4
26.2k
5.5
20.0k
R1 = Black, R2 = (Blue)
Adj. Resistors
R1/(R2)
Vo(nom)
3.3V
5.0V
Va(req’d)
Table 3-2
ADJUSTMENT RANGE AND FORMULA PARAMETERS
Vo1 Bus
Vo2 / Vo3 Bus
Vo(nom)
5.0V
3.3V
All
Va(min)
4.5V
2.97V
Vnom – 10%
Va(max)
5.5V
3.63V
Vnom + 10%
Ro (k
)
4.99
4.42
2.1
Rs (k
)
4.99
Table 3-4
ADJUSTMENT RESISTOR VALUES FOR Vo
2
/ Vo
3
Buses
Vo (nom)
3.3V
2.5V
1.8V
1.5V
1.2V
% Adjust
——————— Adjusted Output Voltage ———————
R1/(R2)
–10
2.97
2.25
1.62
1.35
1.08
(3.4)k
– 9
3.003
2.275
1.638
1.365
1.092
(4.6)k
– 8
3.036
2.3
1.656
1.38
1.104
(6.0)k
– 7
3.069
2.325
1.674
1.395
1.116
(7.9)k
– 6
3.102
2.35
1.692
1.41
1.128
(10.4)k
– 5
3.135
2.375
1.71
1.425
1.14
(13.9)k
– 4
3.168
2.4
1.728
1.44
1.152
(19.2)k
– 3
3.201
2.425
1.746
1.455
1.64
(27.9)k
– 2
3.234
2.45
1.764
1.47
1.176
(45.4)k
– 1
3.267
2.475
1.782
1.485
1.188
(97.9)k
0
3.3
2.5
1.8
1.5
1.2
+ 1
3.333
2.525
1.818
1.515
1.212
100.0k
+ 2
3.366
2.55
1.836
1.53
1.224
47.5k
+ 3
3.399
2.575
1.854
1.545
1.236
30.0k
+ 4
3.432
2.6
1.872
1.56
1.248
21.3k
+ 5
3.465
2.625
1.89
1.575
1.26
16.0k
+ 6
3.498
2.65
1.908
1.58
1.272
12.5k
+ 7
3.531
2.675
1.926
1.605
1.284
10.0k
+ 8
3.564
2.7
1.944
1.62
1.296
8.1k
+ 9
3.597
2.725
1.962
1.635
1.308
6.7k
+10
3.630
2.75
1.98
1.65
1.32
5.5k
Table 3-3
ADJUSTMENT RESISTOR VALUES FOR Vo
1
Bus
PT4850 Series
Notes:
1. Use only a single 1% (or better) tolerance resistor in
either the R1 or (R2) location to adjust a specific output.
Place the resistor as close to the ISR as possible.
2. Never connect capacitors to any of the ‘Vox Adj’ pins. Any
capacitance added to these control pins will affect the
stability of the respective regulated output.
3. Adjustments made to any output must also comply with
the following limitations.
Vo1
≥ (Vo2 + 0.5V), and
Vo1
≥ (Vo3 + 0.5V)
R1 = Black, R2 = (Blue)
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