參數(shù)資料
型號： PT7707N
英文描述： One Cycle Control PFC IC designed to operate in continuous conduction mode (CCM), designed and qualified for the Industrial market.; One Cycle Control PFC IC designed to operate in continuous conduction mode (CCM) in Tape and Reel Packaging.
中文描述： 模擬IC
文件頁數(shù)： 1/5頁
文件大?。?/td> 202K
代理商： PT7707N
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Standard Application
For STBY* pin;
open = output enabled
ground = output disabled.
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
Pin Function
10
V
in
11
V
in
12
Remote Sense Gnd
13
GND
14
GND
15
GND
16
GND
17
GND
PT7705—5V
The PT7705 is a series of high-
performance, 18 Amp Integrated
Switching Regulators (ISRs) housed in
a 27-pin SIP package. The 18A capa-
bility allows easy integration of the
latest high-speed, low-voltage μPs and
bus drivers into existing 5V systems.
The PT7705 series has been de-
signed to work in parallel with one or
more of the PT7749 - 18A current
boosters for increased I
out
in incre-
ments of 18A.
The output voltage of the PT7705
can be easily programmed from 1.3V
to 3.5V with a 5 bit input compatible
with Intel’s Pentium
II Processor.
A differential remote sense is also
provided which automatically com-
pensates for any voltage drop from the
ISR to the load.
1200μF of output capacitance are
required for proper operation.
Cin= Required 1200μF electrolytic
Cout= Required 1200μF electrolytic
= Optional 1μH input choke
PT7705
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
18 Amp “Big-Hammer” Programmable
Integrated Switching Regulator
Pin Function
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
SLTS045A
(Revised 6/30/2000)
Specifications
Characteristics
(T
a
= 25°C unless noted)
Output Current
PT7705 SERIES
Typ
—
—
—
Symbols
I
o
Conditions
T
a
= +60°C, 200 LFM, pkg N
T
a
= +25°C, natural convection
0.1A
≤
I
o
≤
15A
V
= +5V, I
= 15A
0°C
≤
T
a
≤
+65°C
4.5V
≤
V
in
≤
5.5V, I
o
= 15A
V
in
= +5V, 0.1
≤
I
o
≤
15A
V
in
= +5V, I
o
= 15A
I
o
step between 7.5A and 15A
V
o
over/undershoot
V
in
= +5V, I
o
= 10A
Min
0.1
(1)
0.1
(1)
4.5
(3)
Max
18
(2)
15
(2)
5.5
Units
A
Input Voltage Range
Output Voltage Tolerance
V
in
V
o
V
V
o
-0.03
—
V
o
+0.03
V
Line Regulation
Load Regulation
V
o
Ripple/Noise
Transient Response
with C
out
= 1200μF
Efficiency
Reg
line
Reg
load
V
n
t
tr
V
os
η
—
—
—
—
—
—
—
—
—
—
±10
±10
50
100
200
89
87
85
79
77
—
—
—
—
—
—
—
—
—
—
mV
mV
mV
μSec
mV
V
o
= 3.3V
V
o
= 2.9V
V
o
= 2.5V
V
o
= 1.8V
V
o
= 1.5V
%
Switching Frequency
o
4.5V
≤
V
in
≤
5.5V
0.1A
≤
I
o
≤
15A
Over V
in
Range
650
700
750
kHz
Absolute Maximum
Operating Temperature Range
Storage Temperature
Mechanical Shock
T
a
0
—
+85
(4)
°C
T
s
—
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
-40
—
+125
°C
—
500
—
G’s
Mechanical Vibration
—
10
—
G’s
Weight
—
—
31/41
—
grams
Notes:
(1) ISR will operate down to no load with reduced specifications. Please note that this product is not short-circuit protected.
(2) The PT7705 series can be easily paralleled with one or more of the PT7749 Current Boosters to provide increased output current in increments of 18A.
(3) The minimum input voltage is 4.5V or Vout+1.2V, whichever is greater.
(4) See SOA curves or consult the factory for the appripriate derating.
Output Capacitors:
The PT7705 series requires a minimum ouput capacitance of 1200μF for proper operation. Do not use Oscon type capacitors. The maximum
allowable output capacitance is 15,000μF. See Capacitor Application Note.
Input Filter:
An input filter is optional for most applications. The input inductor must be sized to handle 15ADC with a typical value of 1μH. The input capacitance must
be rated for a minimum of 1.3Arms of ripple current. For transient or dynamic load applications, additional capacitance may be required.
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