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參數(shù)資料
| 型號： | PT4494 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 100-W 20-A Programmable Isolated DC/DC Converter |
| 中文描述： | 100鎢20 -一種可編程隔離式DC / DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 172K |
| 代理商： | PT4494 |
For technical support and more information, see inside back cover or visit www.ti.com
Application Notes
Increasing the Output Current of the PT4474
with the PT4494 Compatible Current Booster
The PT4494 is a 20-A “Current Booster” module
designed specifically for the PT4474 programmable
DC/DC converter. The booster is controlled directly
by the regulator, and effectively adds an additional
output stage that operates in parallel. This allows
the system to run sychronously, providing a low
noise solution. Up to two booster modules can be
connected to a PT4474 converter. Each booster
module increases the available output current by
20A. A combination of one PT4474 converter and
two PT4494 booster modules can supply up to 60A
of output current; enough to supply a large multi-
processor system. Figure 1-1 shows the connection
schematic for the regulator and current booster
combination.
A current booster is not a stand-alone product, and
can only operate with a regulator. It is housed in
the same package as its compatible regulator, and
shares the same mechanical outline. Except for an
increase in output current, the overall performance
of a converter/booster combination is identical to
that of a stand-alone converter.
Figure 1-1; Current Booster Application Schematic
Table 1-1; Booster Pin-Out Information
Pin
1
2
3
4
5
6
7
8
9
Function
+V
in
–V
in
Do not connect
V
r
V
a
Do not connect
Do not connect
+V
out
+V
out
Pin Function
10 +V
out
11 +V
out
12 +V
out
13 +V
out
14 –V
out
15 –V
out
16 –V
out
17 –V
out
18 –V
out
Pin Function
19 –V
out
20 (–)Vsense
21 Do not connect
22 Do not connect
23 Do not connect
24 Do not connect
25 Do not connect
26 DRV
Notes:
1. Refer to the PT4474 specification table for the
performance of the regulator/booster combination.
2. The pin-out of the current booster modules include a
number pins identified, “Do not connect” (see Table 1-1).
These pins are not connected internally to the module
but must be soldered to a pad to preserve the unit’s
mechanical integrity.
3. A minimum of 150μF of output capacitance is required
across the output of each PT4494 booster for proper
operation. A value greater than 150μF will further
reduce transients due to large and/or fast load steps.
4.
T he converter and all boosters must be located on
the same printed circuit board.
A similar footprint
and trace layout for each module will also facilitate
current sharing.
PT4474, PT4494
PT4494
PT4474
1
2
8 - 13
–
V
IN
-V
OUT
+V
OUT
20
7
REMOTE SENSE (+)
REMOTE SENSE (-)
VID1
PROGRAMMING PINS
Inhibit
3
C
IN
33μF
Optional
+
C
IN
33μF
Optional
+
LOAD
1
8 - 13
14 - 19
+V
IN
25
24
23
22
14-19
2
4 5 26
20
4 5 26
C
150μF
Optional
+
C
150μF
Required
3
+
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PT4494A | 100-W 20-A Programmable Isolated DC/DC Converter |
| PT4494C | 100-W 20-A Programmable Isolated DC/DC Converter |
| PT4474A | 100-W 20-A Programmable Isolated DC/DC Converter |
| PT4474C | 100-W 20-A Programmable Isolated DC/DC Converter |
| PT4494N | 100-W 20-A Programmable Isolated DC/DC Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PT4494A | 功能描述:BOOSTER(PT4474) 20A 24VIN HRZ RoHS:是 類別:電源 - 板載 >> 配件 系列:PT4470 標(biāo)準(zhǔn)包裝:1 系列:- 附件類型:測試板 適用于相關(guān)產(chǎn)品:- |
| PT4494C | 功能描述:BOOSTER(PT4474) 20A 24VIN HZ SMD RoHS:是 類別:電源 - 板載 >> 配件 系列:PT4470 標(biāo)準(zhǔn)包裝:1 系列:- 附件類型:測試板 適用于相關(guān)產(chǎn)品:- |
| PT4494N | 功能描述:BOOSTER(PT4474) 20A 24VIN VRT RoHS:是 類別:電源 - 板載 >> 配件 系列:PT4470 標(biāo)準(zhǔn)包裝:1 系列:- 附件類型:測試板 適用于相關(guān)產(chǎn)品:- |
| PT4495 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:100-W 30-A Programmable Isolated DC/DC Converter |
| PT4495A | 功能描述:CONVERTER 30A BOOSTER PT4472 HRZ RoHS:是 類別:電源 - 板載 >> 配件 系列:PT4470 標(biāo)準(zhǔn)包裝:1 系列:- 附件類型:測試板 適用于相關(guān)產(chǎn)品:- |
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