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參數(shù)資料
| 型號： | PT4493A |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 100 W DC-DC BOOSTER MODULE |
| 封裝： | HORIZONTAL THROUGH HOLE-26 |
| 文件頁數(shù)： | 4/7頁 |
| 文件大小： | 174K |
| 代理商： | PT4493A |
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
Function
Pin Function
1+Vin
10 +Vout
19 –Vout
2–Vin
11 +Vout
20 (–)Vsense
3
Do not connect
12 +Vout
21 Do not connect
4Vr
13 +Vout
22 Do not connect
5Va
14 –Vout
23 Do not connect
6
Do not connect
15 –Vout
24 Do not connect
7
Do not connect
16 –Vout
25 Do not connect
8+Vout
17 –Vout
26 DRV
9+Vout
18 –Vout
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 33F of output capacitance is required
across the output of each PT4493 booster for proper
operation. A value greater than 33F will further
reduce transients due to large and/or fast load steps.
4. The 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
VID1
VID2
VID3
PROGRAMMING PINS
Inhibit
3
C
IN
33F
Optional
+
C
IN
33F
Optional
+
LOAD
1
8 - 13
14 - 19
+V
IN
25
VID4
24
23
22
21
14-19
2
4526
20
4526
C
OUT
33F
Optional
+
C
OUT
33F
Required 3
+
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PT4493C | 功能描述:BOOSTER(PT4476)8.5A 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:- |
| PT4493N | 功能描述:BOOSTER(PT4476) 8.5A 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:- |
| PT4494 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:100-W 20-A Programmable Isolated DC/DC Converter |
| 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:- |
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