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PT7721C

更新时间： 2024-11-11 23:29:39
品牌 Logo 应用领域
其他 - ETC 控制器
页数 文件大小 规格书
7页 144K
描述
SMPS Controller

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中文翻译

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PT7721C 数据手册

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— Not Recommended for New Designs —  
PT7720 Series  
17A, 12-V Input “Big-Hammer II”  
Programmable ISR  
SLTS048B  
(Revised 5/21/2002)  
Features  
• +12V Bus Input  
• 5-bit Programmable:  
1.3V to 3.5V or  
4.5V to 7.6V  
• High Efficiency  
• Differential Remote Sense  
• 27-pin SIP Package  
• Parallelable with PT7748  
17A current booster  
Pin-Out Information  
Pin Function  
Ordering Information  
Description  
The PT7720 series is a +12-V input,  
17-A output, high-performance Integrated  
Switching Regulator (ISR), housed in a  
27-pin SIP package. The 17A capability  
allows easy integration of the latest high-  
speed, low-voltage microprocessors and  
bus drivers into +12V power systems.  
The output voltage is programmable  
using a 5-bit code. The output voltage  
range and code for the PT7721 is com-  
patible with Intel’s Pentium II processor.  
The PT7720 series has been designed  
to work in parallel with one or more of  
the PT7748 current boosters, allowing  
the output load current capacity to be  
increased in increments of 17A.  
Pin Function  
15 GND  
16 GND  
17 GND  
18 GND  
19 GND  
20 Vout  
21 Vout  
22 Vout  
23 Vout  
24 Vout  
PT 7721r = 1.3 to 3.5 Volts  
PT 7722r = 4.5 to 7.6 Volts  
PT 7748r = 17-A Booster  
1
2
3
4
5
6
7
8
9
VID0  
VID1  
VID2  
VID3  
STBY #  
VID4  
Vin  
PT Series Suffix  
(PT1234x)  
Vin  
Vin  
Case/Pin  
O rder  
Package  
Configuration Suffix  
Code *  
10 Vin  
11 Vin  
12 Sense Gnd  
13 GND  
14 GND  
Vertical  
Horizontal  
SMD  
N
A
C
(EJE)  
(EJF)  
(EJG)  
25 Vout  
26 Sense Vout  
27 Sync Out  
* Previously known as package styles 1000/  
1010. (Reference the applicable package code  
drawing for the dimensions and PC board  
layout)  
#
For further information, see application  
notes.  
A differential remote sense is provided  
to compensate for voltage drop between  
the ISR to the load. A 1200µF of output  
capacitance is required for proper operation.  
Standard Application  
PROGRAMMING PINS  
VID0  
VID1  
VID2  
VID3  
VID4  
REMOTE SENSE (+)  
6
4
3
2
1
26  
L1  
VIN  
VOUT  
7 - 11  
20 - 25  
PT7720  
1µH  
27  
13 - 19  
5
12  
+
+
CIN  
COUT  
LOAD  
SYNC OUT  
GND  
GND  
STBY*  
REMOTE SENSE (-)  
C
C
= Required 560µF electrolytic  
(See input filter note)  
= Required 1200µF electrolytic  
= Optional 1µH input choke  
in  
out  
L1  
For technical support and more information, see inside back cover or visit www.ti.com  
1234567

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