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參數(shù)資料
| 型號(hào)： | PT4476C |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 100-W 8.5-A Programmable Isolated DC/DC Converter |
| 中文描述： | 100鎢8.5 -一種可編程隔離式DC / DC轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 4/8頁(yè) |
| 文件大?。?/td> | 195K |
| 代理商： | PT4476C |
For technical support and more information, see inside back cover or visit www.ti.com
Application Notes
Increasing the Output Current of the PT4476
with the PT4493 Compatible Current Booster
The PT4493 is a 8.5-A “Current Booster” module
designed specifically for the PT4476 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 PT4476 converter. Each booster
module increases the available output current by 8.5A.
A combination of one PT4476 converter and two
PT4493 booster modules can supply up to 25.5A of
output current; enough power to supply a moderately
sized rack-mounted 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 PT4476 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 33μF of output capacitance is required
across the output of each PT4493 booster for proper
operation. A value greater than 33μF 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.
PT4476, PT4493
PT4493
PT4476
1
2
8 - 13
–
V
IN
-V
OUT
+V
OUT
20
7
REMOTE SENSE (+)
REMOTE SENSE (-)
VID0
PROGRAMMING PINS
Inhibit
3
C
IN
33μF
Optional
+
C
IN
33μF
Optional
+
LOAD
1
8 - 13
14 - 19
+V
IN
25
24
23
22
21
14-19
2
4 5 26
20
4 5 26
C
33μF
Optional
+
C
33μF
Required
3
+
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| PT4476N | 100-W 8.5-A Programmable Isolated DC/DC Converter |
| PT4493 | 100-W 8.5-A Programmable Isolated DC/DC Converter |
| PT4493A | 100-W 8.5-A Programmable Isolated DC/DC Converter |
| PT4493C | 100-W 8.5-A Programmable Isolated DC/DC Converter |
| PT4493N | 100-W 8.5-A Programmable Isolated DC/DC Converter |
相關(guān)代理商/技術(shù)參數(shù) |
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| PT4476N | 功能描述:CONV DC-DC 12VADJ 24VIN 8.5A VRT RoHS:是 類別:電源 - 板載 >> DC DC Converters 系列:PT4470 標(biāo)準(zhǔn)包裝:10 系列:PT4570 類型:隔離 輸出數(shù):1 電壓 - 輸入（最?。?36V 電壓 - 輸入（最大）:75V Voltage - Output 1:9V Voltage - Output 2:- Voltage - Output 3:- 電流 - 輸出（最大）:3.3A 電源（瓦） - 制造商系列:30W 電壓 - 隔離:1.5kV（1500V） 特點(diǎn):- 安裝類型:表面貼裝 封裝/外殼:19-SIP SMD 模塊 尺寸/尺寸:3.00" L x 1.19" W x 0.50" H（76.2mm x 30.2mm x 12.7mm） 包裝:托盤(pán) 工作溫度:-40°C ~ 85°C 效率:84% 電源（瓦特）- 最大:30W |
| PT4480 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:100-W 30-A Programmable Isolated DC/DC Converter |
| PT4481 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:100-W 30-A Programmable Isolated DC/DC Converter |
| PT4481A | 功能描述:DC/DC轉(zhuǎn)換器 ISOLATED DC/DC CONVERTER RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| PT4481C | 功能描述:DC/DC轉(zhuǎn)換器 ISOLATED DC/DC CONVERTER RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
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