參數(shù)資料
型號(hào)： PT7721
廠商： Texas Instruments, Inc.
英文描述： 1.3 to 3.5Vout 17Amp 12V-Input 'Big-Hammer' II Programmable ISR
中文描述： 1.3 至 3.5V 17A 輸出 12V 輸入的 Big-Hammer II 可編程 ISR
文件頁(yè)數(shù)： 1/4頁(yè)
文件大?。?/td> 200K
代理商： PT7721
PT7720
7 - 11
13 - 19
20 - 25
27
V
IN
GND
1μH
GND
V
OUT
C
OUT
+
C
IN
+
12
26
1
L1
SYNC OUT
LOAD
REMOTE SENSE (+)
REMOTE SENSE (-)
VID1
PROGRAMMING PINS
VID0
2
3
4
STBY*
5
6
For assistance or to order, call
(800) 531-5782
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902
http://www.powertrends.com
50
Pin-Out Information
Pin Function
1
VID0
2
VID1
3
VID2
4
VID3
5
STBY*
- Stand-by
6
VID4
7
V
in
8
V
in
9
V
in
10
V
in
11
V
in
12
Remote Sense Gnd
13
GND
14
GND
Pin Function
15
GND
16
GND
17
GND
18
GND
19
GND
20
V
out
21
V
out
22
V
out
23
V
out
24
V
out
25
V
out
26
Remote Sense
V
out
27
Sync Out
For STBY* pin:
open = output enabled
ground = output disabled.
Standard Application
Cin
= Required 560μF electrolytic
(See input filter note)
Cout= Optional 1μH input choke
L1
+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 boosters
Features
S e r i e s
17 AMP 12V INPUT “BIG-HAMMER II” PRO-
GRAMMABLE ISR
P T 7 7 2 0
The PT7720 series is a new +12V input,
17A 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 μPs and bus drivers into +12V
distributed power systems.
The PT7720 series has been designed
to work in parallel with one or more of the
PT7748 current boosters for increased I
out
in increments of 17A.
The output voltage of the PT7721 can
be easily programmed from 1.3V to 3.5V
with a 5 bit input compatible with Intel’s
Pentium
IIProcessor. A differential re-
mote sense is also provided which
automatically compensates for any voltage
drop from the ISR to the load.
1200μF of output capacitance is re-
quired for proper operation.
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.
Specifications
Characteristics
(T
a
= 25°C unless noted)
Output Current
PT7720 SERIES
Min
0.1
*
0.1
*
—
—
11.0
V
o
-0.03
—
—
—
—
—
—
—
—
—
—
—
Symbols
I
o
Conditions
T
a
=
+60°C, 200 LFM, pkg N, V
o
≤
5V
T
a
=
+25°C, natural convection, V
o
≤
5V
T
a
=
+60°C, 200 LFM, pkg N, V
o
≥
5V
T
a
=
+25°C, natural convection, V
o
≥
5V
0.1A
≤
I
o
≤
17A
V
= +12V, I
= 17A
0°C
≤
T
a
≤
+60°C
11V
≤
V
in
≤
14V, I
o
= 17A (Using remote sense)
V
in
= +12V, 0.1
≤
I
o
≤
17A (Using remote sense)
V
in
= +12V, I
o
= 17A
Typ
—
—
—
—
—
—
±1.0%
±5
±5
50
100
100
200
90
88
85
78
Max
17
**
17
**
85
85
14.0
V
+0.03
±2.0%
±10
±10
—
—
—
—
—
—
—
—
Units
A
A
Watts
Watts
V
V
% V
o
mV
mV
mVpp
mVpp
μSec
mV
%
%
%
%
Output Power
P
o
Input Voltage Range
Output Voltage Tolerance
V
in
V
o
(PT7721)
(PT7722)
Line Regulation
Load Regulation
V
o
Ripple/Noise
Reg
line
Reg
load
V
n
(PT7721)
(PT7722)
Transient Response
with C
out
= 1200μF
Efficiency
t
tr
V
os
η
I
o
step between 7.5A and 15A
V
o
over/undershoot
V
in
= +12V, I
o
= 10A
V
o
= 5.0V
V
o
= 3.3V
V
o
= 2.5V
V
o
= 1.5V
Switching Frequency
o
11V
≤
V
in
≤
14V
0.1A
≤
I
o
≤
17A
—
300
350
400
kHz
Absolute Maximum
Operating Temperature Range
Recommended Operating
Temperature Range
Storage Temperature
Mechanical Shock
T
a
0
—
+85
°C
T
a
Forced Air Flow = 200 LFM
At V
in =
12V,
I
o
= 12A
—
Per Mil-STD-883D, Method 2002.3 , 1 msec,
Half Sine, mounted to a fixture
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, Soldered in a PC board
Vertical/Horizontal
0
—
+65
***
°C
T
s
-40
—
+125
°C
—
TBD
—
G’s
Mechanical Vibration
—
TBD
—
G’s
Weight
* ISR-will operate down to no load with reduced specifications. Please note that this product is not short-circuit protected.
** The PT7720 series can be easily paralleled with one or more of the PT7748 Current Boosters to provide increased output current in increments of 17A.
*** See Safe Operating Area chart.
—
—
51/64
—
grams
Revised 1/13/99
Application Notes
Mechanical Outline
Product Selector Guide
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PT7721A 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 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(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
PT7721C 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 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(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
PT7721N 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 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(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
PT7722 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:17 AMP 12V INPUT “BIG-HAMMER II” PROGRAMMABLE ISR
PT7722A 功能描述:開(kāi)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(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
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