參數(shù)資料
型號： PT4494A
廠商： Texas Instruments, Inc.
英文描述： 100-W 20-A Programmable Isolated DC/DC Converter
中文描述： 100鎢20 -一種可編程隔離式DC / DC轉(zhuǎn)換器
文件頁數(shù)： 2/8頁
文件大小： 172K
代理商： PT4494A
For technical support and more information, see inside back cover or visit www.ti.com
PT4470 Series Comparison
Output Voltage
Program Range
1.3V– 3.5V
Configuration for
Current Sharing
N+1 with other PT4471s
Functionality
Regulator
PT 4471
PT 4472
Regulator
1.3V– 3.5V
With PT4495 boosters
PT 4495
PT4472 Booster
N/A
Used only with PT4472
PT 4473
Regulator
4.6V–5.7V
N+1 with other PT4473s
PT 4474
Regulator
4.6V–5.7V
With PT4494 boosters
PT 4494
PT4474 Booster
N/A
Used only with PT4474
PT 4475
Regulator
6.5V– 17.5V
N+1 with other PT4475s
PT 4476
Regulator
6.5V–17.5V
With PT4493 boosters
PT 4493
PT4476 Booster
N/A
Used only with PT4476
PT4474
—
24V
100-W 20-A Programmable
Isolated DC/DC Converter
Programming Information
VID4=1
Vout
5.00V
5.10V
5.20V
5.30V
5.40V
5.50V
5.60V
5.70V
VID4=0
Vout
4.60V
4.65V
4.70V
4.75V
4.80V
4.85V
4.90V
4.95V
VID3 VID2 VID1
1
1
1
1
1
0
1
0
0
1
0
1
0
0
0
0
1
0
1
0
1
0
1
0
Logic 0 = Connect to (–)Remote Sense, pin 20
Logic 1 = Open circuit (no pull-up resistors)
VID4 must not be changed while the unit is operating.
Specifications
(Unless otherwise stated, T
a
=25°C, V
in
=24V, V
o
=5V, C
o
=0μF, and I
o
=I
o
max)
PT4474
Typ
Characteristic
Symbol
Conditions
Min
Max
Units
Output Current
Input Voltage Range
Set Point Voltage Tolerance
Temperature Variation
Line Regulation
Load Regulation
Total Output Voltage Variation
I
o
V
in
V
o
tol
Reg
temp
Reg
line
Reg
load
V
o
tot
Over V
in
range
Over I
o
Range
0
18
—
—
—
—
—
24
±1
±0.5
±0.1
±0.5
20
36
±1.5
—
±1
±1
A
VDC
%V
o
%V
o
%V
o
%V
o
–40°
≤
T
case
≤
+100°C, I
o
=0
Over V
in
range
Over I
o
range
Includes set-point, line, load,
–40°
≤
T
case
≤
+100°C
I
o
=15A
20MHz bandwidth
0.1A/μs load step, 50% to 75% I
o
max
V
o
over/undershoot
1A/μs load step, 50% to 100% I
o
max
V
o
over/undershoot
V
=18V,
V
= –1%
foldback continuous limit
with PT4494 booster
Shutdown and latch off
Over V
in
range
—
±2
±3
%V
o
Efficiency
V
o
Ripple (pk-pk)
Transient Response
η
V
r
t
tr
V
tr
—
—
—
—
—
—
90
60
N/A
1
75
±6
—
75
—
—
—
—
%
mV
pp
μs
%V
o
μs
%V
o
Current Limit
I
lim
—
25
—
A
Current Share Tolerance
Over-Voltage Protection
Switching Frequency
Under-Voltage Lockout
Inhibit (Pin 3)
Input High Voltage
Input Low Voltage
Input Low Current
Standby Input Current
Internal Input Capacitance
External Output Capacitance
Isolation Voltage
Capacitance
Resistance
Operating Temperature Range
Over-Temperature Shutdown
Storage Temperature
Reliability
I
shr
tol
OVP
s
UVLO
—
—
270
—
±10
125
300
17
—
—
350
—
%
%V
o
kHz
V
Referenced to –V
in
(pin 2)
V
IH
V
IL
I
IL
I
in
standby
C
in
C
out
2.5
–0.5
—
—
—
0
1500
—
10
-40
—
-40
—
—
–0.2
4
3
—
—
1100
—
—
120
—
Open
(1)
+0.8
—
10
—
10,000
—
—
—
+115
(2)
—
+125
V
mA
mA
μF
μF
V
pF
M
°C
°C
°C
pins 3 & 2 connected
Between +V
o
and –V
o
Input–output/input–case
Input to output
Input to output
Case temperature, over V
in
range
Case temperature, auto reset
—
Per Bellcore TR-332
50% stress, T
a
=40°C, ground benign
Per Mil-Std-883D, method 2002.3,
1mS, half-sine, mounted to a fixture
Mil-Std-883D, Method 2007.2
20-2000Hz, pcb mounted
—
Materials meet UL 94V-0
T
c
OTP
T
s
MTBF
1.4
—
—
10
6
Hrs
Mechanical Shock
—
—
500
—
G’s
Mechanical Vibration
—
Horizontal
—
20
(3)
—
G’s
Weight
Flammability
Notes:
(1) The Inhibit (pin 3) has an internal pull-up, which if left open circuit allows the converter to operate when input power is applied. The open-circuit is
limited to 6.5V. Refer to the application notes for interface considerations.
(2) See Safe Operating Area curves or contact the factory for the appropriate derating.
(3) The case pins on through-hole pin configuration (suffix A) must be soldered. For more information see the applicable package outline drawing.
—
—
—
90
—
grams
# This specification covers only the PT4474 regulator and PT4494 current booster.
#
#
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