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参数资料
| 型号： | PTB48501AAZ |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 2-OUTPUT 32.4 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT PACKAGE-10 |
| 文件页数： | 12/18页 |
| 文件大小： | 400K |
| 代理商： | PTB48501AAZ |
www.ti.com
ELECTRICAL CHARACTERISTICS (PTB48500A)
SLTS218C – SEPTEMBER 2003 – REVISED AUGUST 2006
(Unless otherwise stated, T
A = 25°C, VI = 48 V, CI = 0 F, CO = 0 F, and IO = 50% Iomax)
PTB48500A
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Po1, Po2
Output Power
Vo1 (3.3 V)
19.8
W
Vo2 (1.2 V)
8.4
Po total
Both outputs
28
W
Io1, Io2
Output Current
Over VI range
Vo1 (3.3 V)
0
6(1)
A
Vo2 (1.2 V)
0
7(1)
Io1 + Io2
Total (both outputs)
0
13
A
Vo1
Output Voltage
3.2
3.3
3.4
Includes set point, line, load, –40
°C ≤ T
A ≤ 85°C
V
Vo2
1.16
1.2
1.24
Vo1
±0.5
Reg
temp
Temperature Variation
–40
°C ≤ T
A ≤ 85°C, IO = IO min
%VO
Vo2
±0.8
Reg
line
Line Regulation
Over VI range
Vo1, Vo2
±1
±10
mV
Reg
load
Load Regulation
Over IO range
Vo1, Vo2
±3
±12
mV
IO min ≤ Io2≤ Iomax, Io1 = 1 A
Vo
1
10
Reg
cross
Cross Regulation
mV
IO min ≤ Io1≤ Iomax, Io2 = 1 A
Vo
2
10
η
Efficiency
Io1, Io2 = Iomax
82%
Vo1
20
50
Vr
VO Ripple (pk-pk)
20 MHz bandwidth
mVpp
Vo2
20
50
ttr
1 A/
s load step, 50% to 100% I
omax
30
s
Transient Response
V
tr
Vo1, Vo2 over/undershoot
±2.0
%VO
Iotrip
Over Current Threshold
VI = 36 V, reset followed by auto-recovery
Io1 + Io2
13.5
16
A
Output Voltage Adjust
Vadj
Vo2 only
–10
20
%Vo
Range
f S
Switching Frequency
Over VI and IO ranges
500
550
600
kHz
VI on
VI increasing
34
Under-Voltage Lockout
V
VI off
VI decreasing
32
On/Off Enable (pin 3)
Referenced to –VI (pin 5)
VIH
Input High Voltage
3.6
75 (2)
V
VIL
Input Low Voltage
–0.2
0.8
IIL
Input Low Current
–1
mA
II standby
Standby Input Current
Pins 3 and 5 connected
2
mA
CI
Internal Input Capacitance
2
F
Co1
0(3)
5000
External Output
F
Capacitance
Co2
0(3)
5000
Per Telcordia SR-332 50% stress, TA = 40°C,
MTBF
Reliability
1.5
106 Hrs
ground benign
(1)
See Safe Operating Area curves or contact the factory for the appropriate derating.
(2)
The On/Off Enable (pin 3) has an internal pull-up and may be controlled with an open-collector (or open-drain) transistor. The input is
diode protected and may be connected to +VI. The maximum open-circuit voltage is 7 V. If it is left open circuit the converter will operate
when input power is applied.
(3)
An output capacitor is not required.
3
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