PT7747 [TI]
15 AMP “CURRENT BOOSTER” FOR PT7750 SERIES; 15 AMP “目前助推器” FOR PT7750系列
| 型号： | PT7747 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 15 AMP “CURRENT BOOSTER” FOR PT7750 SERIES |
| 文件： | 总2页 (文件大小：150K) |
| 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 1/12/99
P T 7 7 4 7 S e r i e s
Application Notes
Mechanical Outline
Product Selector Guide
15 AMP “CURRENT BOOSTER”
FOR PT7750 SERIES
The PT7747 is a new high-perfor-
A PT7747 current booster adds a parallel
mance 15 Amp “Current Booster” for
the PT7750 Series housed in a 27-pin
SIP package. Multiple PT7747 boost-
ers will operate in parallel with the
PT7750 Series boosting output current
in increments of 15A . Combinations
of PT7750s and PT7747 current
boosters can easily supply enough
power for virtually any multiple
output stage driven by the PT7750. As such,
the system runs in perfect sychronization
providing a low noise solution.
The PT7747 only operates in combina-
tion with the PT7750 series and is not a
stand-alone product. Therefore please refer
the PT7750 series data sheet for perfor-
mance specifications. The PT7747 also has
the same mechanical dimensions and pack-
age options as the PT7750 series.
megaprocessor application.
Pin-Out Information
Pin Function
Ordering Information
PT7747❏
Pin Function
14 GND
15 GND
16 GND
17 GND
18 GND
19 GND
20 Vout
1
2
Do not connect
Do not connect
Do not connect
Do not connect
Do not connect
Do not connect
Vin
3
PT Series Suffix
(PT1234X)
4
Features
• 15A Current Boost
• Automatically Tracks Vout of PT7750
• High Efficiency
5
Case/Pin
Configuration
6
Vertical Through-Hole
Horizontal Through-Hole
Horizontal Surface Mount
N
A
C
7
8
Vin
21 Vout
• Input Voltage Range:
20V to 28V
• Synchronized with PT7750
• 27-pin SIP Package
9
Vin
22 Vout
10
11
Vin
23 Vout
Vin
24 Vout
(For dimensions and PC board layout,
see Package Styles 1000 and 1010.)
12
13
Do not connect
GND
25 Vout
• Run up to 4 in Parallel - 60 Amps
26
27
Do not connect
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
PT7750
1µH
27
13 - 19
5
12
+
+
CIN
COUT
LOAD
STBY*
GND
GND
REMOTE SENSE (-)
27
C
C
= Required 560µF electrolytic
= Required 2000µF electrolytic
in
out
L1
L1 = Optional 1µH input choke
7 - 11
20 - 25
PT7747
1µH
13 - 19
+
+
CIN
COUT
Output Capacitors: The PT7750/PT7747 series requires a minimum output capacitance of 2000µF for proper operation. Do not use Oscon type capacitors. The maximum
allowable output capacitance is (42,000 4 Vout)µF for the PT7751, (96,000 4 Vout)µF for the PT7756, or 15,000µF, whichever is less.
Input Filter: An input inductor is optional for most applications. The input inductor must be sized to handle 9ADC with a typical value of 1µH. The input capacitance
must be rated for a minimum of 8.0 Arms of ripple current when operated at maximum output current and maximum output voltage. Contact an applications engi-
neer for input capacitor selection for applications at other output voltages and output currents.
58
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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