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参数资料
| 型号： | PTB48580AAZ |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 2-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT, DIP-8 |
| 文件页数： | 9/13页 |
| 文件大小： | 394K |
| 代理商： | PTB48580AAZ |
For technical support and further information visit http://power.ti.com
PTB48580B
Dual Complementary-Output
DC/DC Converter for DSL
SLTS240 DECEMBER 2004
Specifications (Unless otherwise stated, T
A =25°C, VI =48 V, CI =0 F, ±CO =0 F, |+IO | = |–IO |, and |±IO | =0.5 |±IO |max)
PTB48580B
Characteristic
Symbol
Conditions
Min
Typ
Max
Units
Output Power
P
O
Total output power from ±V
O
0—
30 (1)
W
Output Current
|±I
O |
Over VI range, |+IO | – |–IO | ≤ 0.1 A
0
—
1.25 (2)
A
Output Load Imbalance
|+I
O | – |–IO ||+IO | ≥0.1 A, |–IO | ≥ 0.1 A
0
—
0.5 (3)
A
Output Voltage
|±V
O |
Inlcudes set-point, line,
|+I
O | – |–IO | ≤ 0.1 A
11.6 (2)
12
12.4 (2)
V
–40
≤T
A ≤+85°C
Temperature Variation
Reg
temp
–40
≤T
A ≤ +85°C, |±IO | =0.1 A
±V
O
—±1
—
%V
O
Line Regulation
Reg
line
Over VI range, balanced load
±VO
—
±0.1
±0.5
%VO
Load Regulation
Reg
load
Over ±I
O range, balanced load
±V
O
—
±0.1
±1
%V
O
Efficiency
η
PO =PO max
—
88
—
%
V
o Ripple (pk-pk)
±Vr
20 MHz bandwidth,
—
50
100 (4)
mV
pp
CO =10 F tantalum capacitor
Transient Response
tS
0.1 A/s load step, 50% to 75% ±IO max
—
30
—
s
V
O pk
|±V
O | over/undershoot
—
±1
—
%VO
Over Current Threshold
IOtrip
VI =36 V
1.4
1.9
2.4
A
reset followed by auto-recovery
Short Circuit Current
Continuous over-current trip,
|±I
O |PK
—3
—A
|+I
O | = |–IO |
Duty
—
10
—
%
Output Voltage Adjust Range
|±V
O | adj
|+V
O | and |–VO | adjust simulataneously
6.5
—
13.4 (5)
V
Switching Frequency
S
Over V
I and IO ranges
440
480 (6)
520
kHz
Under-Voltage Lockout
VIon
VI increasing
—
33
—
V
VIoff
VI decreasing
—
32
—
On/Off Enable (pin 3)
Referenced to –V
I (pin 4)
Input High Voltage
VIH
+3.6
—
+75 (7)
V
Input Low Voltage
VIL
–0.2
—
+0.8
Input Low Current
I
IL
——–1
mA
Standby Input Current
II standby
pin 3 open circuit
—
2
—
mA
Start-up Time
t
ON
|±I
O | =1 A, |±VO | rising 0 to 0.95 |±VO | TYP
—10
—
ms
Internal Input Capacitance
CI
—2
—F
External Output Capacitance
C
O
Capacitance from either output to COM (pin 6)
0
—
1,500 (8)
F
Reliability
MTBF
Per Telcordia SR-332
2.8
—
106 Hrs
50% stress, TA =40°C, ground benign
Notes:
(1) See Safe Operating Area curves or contact the factory for the appropriate derating.
(2) Under balanced load conditions, load current flowing out of +V
O is balanced to within ±0.1 A of that flowing into –VO .
(3) A load imbalance is the difference in current flowing from +V
O to –VO . The module can operate with a higher imbalance but with reduced specifications.
(4) Output voltage ripple is measured with a 10-F tantalum capacitor connected from +V
O (pin 5) or –VO (pin 8), to COM (pin 6).
(5) When the output voltage is adjusted higher than the nominal output voltage the load current must not exceed the module’s maximum power rating.
(6) This is the free-running frequency. The module can be made to synchronize with the PTB48500 when both modules are used together in a system.
(7) 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 +V
I . The open-circuit voltage is 7 V max. If it is left open circuit the converter will operate when input power is applied.
(8) Electrolytic capacitors with very low equivalent series resistance (ESR) may induce instability when used on the output. Consult the factory before using
capacitors with organic, or polymer-aluminum type electrolytes.
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