參數(shù)資料
型號： PT4852
廠商： Texas Instruments, Inc.
英文描述： "3.3V/1.8V/1.5V 25A
中文描述： 3.3V/1.8V/1.5V 25A 三路輸出 48V 輸入的 DC/DC 轉(zhuǎn)換器
文件頁數(shù)： 7/13頁
文件大?。?/td> 233K
代理商： PT4852
For technical support and more information, see inside back cover or visit www.ti.com
PT4856
25-A Triple Output Isolated DC/DC
Converter For Logic Applications
SLTS166C - FEBRUARY 2002 - REVISED MARCH 2003
PT4856 Electrical Specifications
(Unless otherwise stated, the operating conditions are:- T
a
=25°C, V
in
=48V, and I
o
=0.5I
o
max)
PT4856 (Only)
Typ
Characteristics
Symbols
Conditions
Min
Max
Units
Output Current
I
o
Each output
Io
1
Io
2
Io
3
0
0
0
—
36
—
—
—
—
—
—
—
—
—
—
—
—
—
±0.5
±0.2
±5
—
10
10
10
25
75
80
1.5
—
±0.5
±10
±10
A
I
o
tot
V
in
Total (all three outputs)
Continuous
Surge (1 minute)
A
Input Voltage Range
V
Set-Point Voltage Tolerance
Temperature Variation
Line Regulation
Load Regulation
Cross Regulation
Total Output Voltage Variation
V
o
tol
Reg
temp
Reg
line
Reg
load
Reg
cross
V
o
tol
%V
o
%V
o
%V
o
mV
mV
–40°C
≤
T
a
≤
+85°C, Io
1
=Io
2
=Io
3
=I
o
min
All outputs, Over V
in
range
Each output, 0
≤
I
o
≤
I
o
max
Any output vs. another
Includes set-point, line, load,
–40°C
≤
T
a
≤
+85°C
Io
1
=7A, Io
2
=5A, Io
3
=5A
20MHz bandwidth,
Io
1
=Io
2
=Io
3
=5A
—
±2
±3
(1)
%V
o
Efficiency
V
o
Ripple (pk-pk)
η
V
r
—
—
—
—
—
—
—
—
—
—
—
280
—
30
88
50
20
15
200
5
±10
20
15
15
125
(2)
320
34
32
—
75
50
25
—
—
—
—
—
—
—
340
36
—
%
V
o
=
5.0V
V
o
=
3.3V
V
o
=
1.5V
mV
pp
Transient Response
t
tr
V
os
V
o
adj
I
LIM
0.1A/μs load step, 50% to 75% I
o
max
V
o
over/undershoot
μSec
%V
o
%V
o
Output Adjust Range
Current Limit Threshold
Vo
1
/Vo
2
/Vo
3
V
o
= –1%
Vo
1
Vo
2
Vo
3
A
Output Over-Voltage Protection
Switching Frequency
Under Voltage Lockout
OVP
s
V
on
V
off
All outputs; module shutdown and latch off
Over V
in
and I
o
ranges
V
in
increasing
V
in
decreasing
Referenced to –V
in
(pin 2)
%V
o
kHz
V
Enable Control (pins 3 & 4)
High-Level Input Voltage
Low-Level Input Voltage
Low-Level Input Current
V
IH
V
IL
I
IL
I
in
standby
C
int
C
out
V
iso
C
iso
R
iso
V
temp
3.5
–0.2
—
—
—
0
1500
—
10
—
—
—
—
0.5
2.5
2
—
—
2,200
—
0.1
(4)
1.5
(4)
Open
(3)
0.8
(3)
—
4
(1)
—
5,000
—
—
—
—
—
V
mA
mA
μF
μF
V
pF
M
Standby Input Current
Internal Input Capacitance
External Output Capacitance
Primary/Secondary Isolation
pins 3 & 4 open circuit
Per each output
Temperature Sense
Output voltage at temperatures:-
–40°C
100°C
V
Notes:
(1) Limits are specified by design.
(2) This is a fixed parameter. Adjusting Vo
or Vo
2
higher will increase the module’s sensitivity to over-voltage detection. For more information, see the
application note on output voltage adjustment.
(3) The Enable inputs (pins 3 & 4) have internal pull-ups. Leaving pin 4 open-circuit and connecting pin 3 to –V
in
(pin 2) allows the the converter to
operate when input power is applied. The maximum open-circuit voltage for the Enable inputs is 5.4V.
(4) Voltage output at “TEMP” pin is defined by the equation:- V
TEMP
= 0.5 + 0.01·T, where T is in °C. See pin descriptions for more information.
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PT4852C 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Triple-Output Iso DC-DC Cnvtr RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
PT4852N 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Triple-Output Iso DC-DC Cnvtr RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
PT4853 制造商:TI 制造商全稱:Texas Instruments 功能描述:25-A Triple Output Isolated DC/DC Converter For Logic Applications
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