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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： | 2/7页 |
| 文件大小： | 274K |
| 代理商： | PTB48500AAST |
For technical support and further information visit http://power.ti.com
Ordering Information
Package Options (PT48500x
HH)
Code
Description
Pkg Ref. (1)
AH
Horiz. T/H
(ERH)
AS
SMD, Standard (2)
(ERJ)
Output Voltage (PTB48500
Hxx)
Code
Voltage
A
3.3 V / 1.2 V
Notes:
(1) Reference the applicable package reference drawing for the dimensions and PC board layout
(2) “Standard” option specifies 63/37, Sn/Pb pin solder material.
Pin Descriptions
+Vin:
The positive input supply for the module with respect
to –Vin. When powering the module from a –48 V telecom
central office supply, this input is connected to the primary
system ground.
–Vin:
The negative input supply for the module, and the
0 VDC reference for the ‘Enable’, ‘EN Out’, and ‘Sync
Out’ signals. When the module is powered from a +48-V
supply, this input is connected to the 48-V Return.
Enable:
This is an open-collector (open-drain) positive
logic input that enables the module output. This pin is
referenced to -Vin. A logic ‘0’ at this pin disables the
module’s outputs, and a high impedance enables the out-
puts. If not used the pin should be left unconnected.
EN Out:
This open-collector output may be used to enable
the output of other DC/DC converters in applications
where the power-up sequence of the related voltages must
be precisely controlled. The output is used principally to
control the power up of the PTB48510 module when
powering ADSL circuits based on the AC7 chipset. The
signal is referenced to -Vin, and is active low. It is initially
‘off’ (high impedance), and turns ‘on’ when the output
voltage, Vo1, has risen to its nominal set-point voltage.
Sync Out:
The signal generated by this pin is designed to
be used exclusively with the PTB48510 in AC7 ADSL
applications. When the ‘Sync Out’ of this converter is
connected directly to the ‘Sync In’ pin of the PTB48510,
both modules will operate at the same switch conversion
frequency.
Vo1:
The higher regulated power output voltage, which
is referenced to the COM node.
Vo2:
The lower regulated power output voltage, which is
referenced to the COM node.
COM:
The secondary return reference for the module’s two
regulated output voltages. It is dc isolated from the input
supply pins.
Vo2 Adjust:
Using a single resistor, this pin allows Vo2 to
be adjusted higher or lower than the preset value. If not
used, this pin should be left open circuit.
POR*:
This pin produces an active-low power-on reset
signal that may be used to reset logic circuitry. The out-
put is set low during power up just as the output voltage
from Vo1 starts to rise. It remains low for 10 ms after the
voltage at Vo1 has reached its nominal set-point voltage.
This signal is referenced to the COM node, and has a
3.3-k
internal pull-up resistor to Vo1.
PTB48500 Series
13-A Dual-Output, 48-V Input Isolated
DC/DC Converter for xDSL
SLTS218 SEPTEMBER 2003
Environmental and General Specifications (Unless otherwise stated, all voltages are with respect to –Vin)
Characteristics
Symbols
Conditions
Min
Typ
Max
Units
Input Voltage Range
Vin
Over output load range
36
48
75
VDC
Isolation Voltage
Input–output/input–case
1500
—
V
Capacitance
Input to output
—
1500
—
pF
Resistance
Input to output
10
—
M
Operating Temperature Range
Ta
Over Vin Range
–40
—
+85
°C
Over-Temperature Protection
OTP
Shutdown threshold
—
115
—
°C
Hysterisis
—
10
—
Solder Reflow Temperature
Treflow
Surface temperature of module body or pins
235 (i)
°C
Storage Temperature
Ts
—
–40
—
125
°C
Mechanical Shock
Per Mil-STD-883D, Method 2002.3
—
500
—
G’s
1 msec, Sine, mounted
Mechanical Vibration
Mil-STD-883D, Method 2007.2
Suffix H
—
20
—
G’s
20-2000 Hz
Suffix C
—
5
—
Weight
—
20
—
grams
Flammability
—
Meets UL 94V-O
Notes:
(i) During reflow of SMD package version do not elevate peak temperature of the module, pins or internal components above the stated maximum.
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| PTB48501AAH | 功能描述:直流/直流开关转换器 3.3/1.2V 32W Out 48V Inp DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| PTB48501AAS | 功能描述:直流/直流开关转换器 3.3/1.2V 32W Out 48V Inp DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| PTB48501AAZ | 功能描述:直流/直流开关转换器 3.3/1.2V 32W Out 48V Inp DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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