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參數(shù)資料
| 型號： | PT4474A |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 100 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | HORIZONTAL, MA-26 |
| 文件頁數(shù)： | 2/8頁 |
| 文件大小： | 175K |
| 代理商： | PT4474A |
For technical support and more information, see inside back cover or visit www.ti.com
PT4470 Series Comparison
Output Voltage
Configuration for
Functionality
Program Range
Current Sharing
PT4471
Regulator
1.3V– 3.5V
N+1 with other PT4471s
PT4472
Regulator
1.3V– 3.5V
With PT4495 boosters
PT4495
PT4472 Booster
N/A
Used only with PT4472
PT4473
Regulator
4.6V–5.7V
N+1 with other PT4473s
PT4474
Regulator
4.6V–5.7V
With PT4494 boosters
PT4494
PT4474 Booster
N/A
Used only with PT4474
PT4475
Regulator
6.5V– 17.5V
N+1 with other PT4475s
PT4476
Regulator
6.5V–17.5V
With PT4493 boosters
PT4493
PT4476 Booster
N/A
Used only with PT4476
PT4474—24V
100-W 20-A Programmable
Isolated DC/DC Converter
Programming Information
VID4=1
VID4=0
VID3 VID2 VID1
Vout
1
5.00V
4.60V
1
0
5.10V
4.65V
1
0
1
5.20V
4.70V
1
0
5.30V
4.75V
0
1
5.40V
4.80V
0
1
0
5.50V
4.85V
0
1
5.60V
4.90V
0
5.70V
4.95V
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, Ta =25°C, Vin =24V, Vo =5V, Co =0F, and Io =Iomax)
PT4474
Characteristic
Symbol
Conditions
Min
Typ
Max
Units
Output Current
Io
Over Vin range
0
—
20
A
Input Voltage Range
Vin
Over Io Range
18
24
36
VDC
Set Point Voltage Tolerance
Vo tol
—
±1
±1.5
%Vo
Temperature Variation
Regtemp
–40°
≤Tcase ≤ +100°C, Io =0
—
±0.5
—
%Vo
Line Regulation
Regline
Over Vin range
—
±0.1
±1
%Vo
Load Regulation
Regload
Over Io range
—
±0.5
±1
%Vo
Total Output Voltage Variation
Votot
Includes set-point, line, load,
—
±2±3%Vo
–40°
≤Tcase ≤ +100°C
Efficiency
η
Io =15A
—
90
—
%
Vo Ripple (pk-pk)
Vr
20MHz bandwidth
—
60
75
mVpp
Transient Response
ttr
0.1A/s load step, 50% to 75% Iomax
—
N/A
—
s
Vtr
Vo over/undershoot
—
1
—
%Vo
1A/s load step, 50% to 100% Iomax
—
75
—
s
Vo over/undershoot
—
±6
—
%Vo
Current Limit
Ilim
Vin =18V, Vo = –1%
—25
—
A
foldback continuous limit
Current Share Tolerance
Ishr tol
with PT4494 booster
—
±10
—
%
Over-Voltage Protection
OVP
Shutdown and latch off
—
125
—
%Vo
Switching Frequency
s
Over Vin range
270
300
350
kHz
Under-Voltage Lockout
UVLO
—
17
—
V
Inhibit (Pin 3)
Referenced to –Vin (pin 2)
Input High Voltage
VIH
2.5
—
Open (1)
V
Input Low Voltage
VIL
–0.5
—
+0.8
Input Low Current
IIL
—
–0.2
—
mA
Standby Input Current
Iin standby
pins 3 & 2 connected
—
4
10
mA
Internal Input Capacitance
Cin
—3
—F
External Output Capacitance
Cout
Between +Vo and –Vo
0
—
10,000
F
Isolation Voltage
Input–output/input–case
1500
—
V
Capacitance
Input to output
—
1100
—
pF
Resistance
Input to output
10
—
M
Operating Temperature Range
Tc
Case temperature, over Vin range
-40
—
+115 (2)
°C
Over-Temperature Shutdown
OTP
Case temperature, auto reset
—
120
—
°C
Storage Temperature
Ts
—
-40
—
+125
°C
Reliability
MTBF
Per Bellcore TR-332
1.4
—
106 Hrs
50% stress, Ta =40°C, ground benign
Mechanical Shock
—
Per Mil-Std-883D, method 2002.3,
—
500
—
G’s
1mS, half-sine, mounted to a fixture
Mechanical Vibration
—
Mil-Std-883D, Method 2007.2
Horizontal
—
20 (3)
—G’s
20-2000Hz, pcb mounted
Weight
—
90
—
grams
Flammability
—
Materials meet UL 94V-0
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.
# This specification covers only the PT4474 regulator and PT4494 current booster.
#
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