PT7748 [TI]
17 AMP “CURRENT BOOSTER” FOR PT7720 SERIES; 17 AMP “目前助推器” FOR PT7720系列
| 型号： | PT7748 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 17 AMP “CURRENT BOOSTER” FOR PT7720 SERIES |
| 文件： | 总2页 (文件大小：151K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
For assistance or to order, call (800) 531-5782
Revised 1/13/99
P T 7 7 4 8 S e r i e s
Application Notes
Mechanical Outline
Product Selector Guide
17 AMP “CURRENT BOOSTER”
FOR PT7720 SERIES
The PT7748 is a new high-perfor-
A PT7748 current booster adds a
mance 17 Amp “Current Booster” for
the PT7720 Series housed in a 27-pin
SIP package. Multiple PT7748 boosters
will operate in parallel with the PT7720
Series boosting output current in incre-
ments of 17A . Combinations of
PT7720 and PT7748 current boosters
can easily supply enough power for virtu-
ally any multiple megaprocessor
parallel output stage driven by the
PT7720. As such, the system runs in
perfect sychronization providing a low
noise solution.
The PT7748 only operates in combi-
nation with the PT7720 series and is not a
stand-alone product. Therefore please
refer the PT7720 series data sheet for
performance specifications. The PT7748
also has the same mechanical dimensions
and package options as the PT7720 series.
application.
Pin-Out Information
Ordering Information
PT7748❏
Pin Function
Pin Function
14 GND
15 GND
16 GND
17 GND
18 GND
19 GND
20 Vout
1
2
3
4
5
6
7
8
9
Do not connect
Do not connect
Do not connect
Do not connect
Do not connect
Do not connect
Vin
Features
• 17A Current Boost
• Automatically Tracks Vout of PT7720
• High Efficiency
• Input Voltage Range:
11V to 14V
PT Series Suffix
(PT1234X)
Case/Pin
Configuration
Vertical Through-Hole
Horizontal Through-Hole
Horizontal Surface Mount
N
A
C
Vin
21 Vout
• Synchronized with PT7720
• 27-pin SIP Package
• Run up to 4 in Parallel - 85 Amps
Vin
22 Vout
10 Vin
23 Vout
(For dimensions and PC board layout,
see Package Styles 1000 and 1010.)
11 Vin
24 Vout
12 Do not connect
13 GND
25 Vout
26 Do not connect
27 Sync In
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
STBY*
GND
GND
REMOTE SENSE (-)
27
C
C
= Required 560µF electrolytic
= Required 1200µF electrolytic
in
out
L1
L1 = Optional 1µH input choke
7 - 11
20 - 25
PT7748
1µH
13 - 19
+
+
CIN
COUT
Output Capacitors: The PT7720 series requires a minimum output capacitance of 1200µF for proper operation. Do not use Oscon type capacitors. The maximum allowable output capacitance
Is (57,000 ÷ Vout)µF, or 15,000µF, whichever is less.
Input Filter: An input inductor is optional for most applications. The input inductor must be sized to handle 7ADC with a typical value of 1µH. The input capacitance must be rated for a
minimum of 4.0 Arms of ripple current when operated at maximum output current and maximum output voltage. Contact an applications engineer for input capacitor selection for
applications at other output voltages and output currents.
52
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
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Copyright 1999, Texas Instruments Incorporated
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