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參數(shù)資料
| 型號： | PT7721N |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 17 A SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, MSMA27 |
| 封裝： | SIP-27 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 166K |
| 代理商： | PT7721N |
For technical support and more information, see inside back cover or visit www.ti.com
Application Notes
Using the PT7748 17-A Current Booster
with the PT7720 Series Programmable ISRs
The PT7748 is a 17-A “Current Booster” module
for the PT7720 series of regulators. The booster is
controlled directly by the regulator, and effectively
adds a parallel output stage. This allows the system
to run sychronously, providing a low noise solution.
Up to four booster modules can be connected to a
single regulator. Each booster increases the available
output current by 17A. Combinations of a regulator
and booster modules can supply power for virtually
any multi-processor application.
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 PT7720 regulator/booster combination is identi-
cal to that of a stand-alone regulator. Refer to the
appropriate data sheet for the performance speci-
fications.
PT7721/22, PT7748
Figure 1-1; Current Booster Application Schematic
PT7748
PT7720
7 - 11
13 - 19
20 - 25
27
GND
V
OUT
12
26
1
REMOTE SENSE (+)
REMOTE SENSE (-)
VID0
VID1
VID2
VID3
PROGRAMMING PINS
2
3
4
STBY*
5
C
IN
+
C
IN
+
C
OUT
+
C
OUT
+
LOAD
7 - 11
20 - 25
13 - 19
27
1H
Lin
1H
Lin
V
IN
6
VID4
To Additional
Boosters
Table 1-1; PT7748 Pin-Out Information
Pin Function
1
No Connect
10 Vin
19 GND
2
No Connect
11 Vin
20 Vout
3
No Connect
12 No Connect
21 Vout
4
No Connect
13 GND
22 Vout
5
No Connect
14 GND
23 Vout
6
No Connect
15 GND
24 Vout
7Vin
16 GND
25 Vout
8Vin
17 GND
26 No Connect
9Vin
18 GND
27 Sync In
Notes:
1. Each booster requires the same amount of input and
output capacitance as recommended for a stand-alone
regulator. See the Standard Application schematic and
the respective input/output filter notes in the PT7720
product data sheet.
2. The 1-H filter choke located at the input of each
regulator and booster module (Lin) is optional for most
applications. If specified, each inductor must be sized
to handle 7ADC at full output load.
3. The pin-out of the current booster modules include a
number pins identified, “No Connect” (see Table 1).
These pins are not connected internally to the module
but must be soldered to a pad to preserve the unit’s
mechanical integrity.
4. A similar PCB footprint and trace layout between the
regulator and each booster will facilitate current sharing
between all modules.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PT7741A | 1-OUTPUT DC-DC BOOSTER MODULE |
| PT7741C | 1-OUTPUT DC-DC BOOSTER MODULE |
| PT7744C | 1-OUTPUT DC-DC BOOSTER MODULE |
| PT7744A | 1-OUTPUT DC-DC BOOSTER MODULE |
| PT7744N | 1-OUTPUT DC-DC BOOSTER MODULE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PT7722 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:17 AMP 12V INPUT “BIG-HAMMER II” PROGRAMMABLE ISR |
| PT7722A | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 4.5-7.6Vout 17Amp 12 Vin Programmable ISR RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| PT7722C | 制造商:POWERTRENDS 功能描述: |
| PT7722N | 功能描述:DC/DC轉(zhuǎn)換器 4.5-7.6Vout 17Amp 12 Vin Programmable ISR 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）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸: |
| PT7740 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:32Amp ＇Current Booster＇ for the PT7778 Regulator |
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