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参数资料
| 型号： | PTB48500AAST |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 2-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 3/7页 |
| 文件大小： | 274K |
| 代理商： | PTB48500AAST |
For technical support and further information visit http://power.ti.com
PTB48500A
13-A Dual-Output, 48-V Input Isolated
DC/DC Converter for xDSL
SLTS218 SEPTEMBER 2003
Specifications (Unless otherwise stated, Ta =25°C, Vin =48V, Cin =0F, Cout =0F, and Io =50% Iomax)
PTB48500A
Characteristic
Symbol
Conditions
Min
Typ
Max
Units
Output Voltage
Vo1
Inlcudes set point, line, load,
3.2
3.3
3.4
V
Vo2
–40
≤ TA ≤ +85 °C
1.16
1.2
1.24
Output Current
Io1, Io2
Over Vin range
Vo1 (3.3 V)
0
—
6 (1)
A
Vo2 (1.2 V)
0
—
7 (1)
Io1 + Io2
Total (both outputs)
0
—
13
A
Temperature Variation
Regtemp
–40°
≤Ta ≤ +85°C, Io =Iomin
Vo1
—
±0.5
—
%Vo
Vo2
—
±0.8
—
Line Regulation
Regline
Over Vin range
Vo1, Vo2
—
±1
±10
mV
Load Regulation
Regload
Over Io range
Vo1, Vo2
—
±3
±12
mV
Cross Regulation
Regcross
Iomin ≤ Io2 ≤ Iomax, Io1 =1 A
Vo1
——10
mV
Iomin ≤ Io1 ≤ Iomax, Io2 =1 A
Vo2
——10
Efficiency
η
Io1, Io2 =Iomax
—
82
—
%
Vo Ripple (pk-pk)
Vr
20MHz bandwidth
Vo1
—20
50
mVpp
Vo2
—20
50
Transient Response
ttr
1A/s load step, 50% to 100% Iomax
—
30
—
s
Vtr
Vo1, Vo2 over/undershoot
—
±2.0
—
%Vo
Over Current Threshold
Iotrip
Vin =36V,
Io1 + Io2
13.5
16
—
A
reset followed by auto-recovery
Output Voltage Adjust Range
Vadj
Vo2 only
±10
—
%Vo
Switching Frequency
s
Over Vin and Io ranges
500
550
600
kHz
Under-Voltage Lockout
Vinon
Vin increasing
—
34
—
V
Vinoff
Vin decreasing
—
32
—
On/Off Enable (pin 3)
Referenced to –Vin (pin 5)
Input High Voltage
VIH
+3.6
—
+75 (2)
V
Input Low Voltage
VIL
–0.2
—
+0.8
Input Low Current
IIL
—–1
—
mA
Standby Input Current
Iin standby
pins 3 & 5 connected
—
2
—
mA
Internal Input Capacitance
Cin
—2
—F
External Output Capacitance
Co1
0 (3)
—
5,000
F
Co2
0 (3)
—
5,000
Reliability
MTBF
Per Bellcore TR-332
1.5
—
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) 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 +Vin. 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.
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