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參數(shù)資料
| 型號(hào)： | PTB78520WAD |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT PACKAGE-10 |
| 文件頁數(shù)： | 8/15頁 |
| 文件大?。?/td> | 443K |
| 代理商： | PTB78520WAD |
For technical support and further information visit http://power.ti.com
Pin Descriptions
+V
IN: The positive input for the module with respect to
–VIN. When powering the module from a negative input
voltage, this input is connected to the input source ground.
–V
IN: The negative input supply for the module, and the
0-V reference for the ‘VO Enable’ input. When powering
the module from a positive source, this input is connected
to the input source return.
Vo Enable*:
An open-collector (open-drain) negative logic
input that is referenced to –VIN. This input must be pulled
to –Vin potential to enable the output voltage. A high-
impedance connection will disable the module output. If
the output enable feature is not used, pin 2 should be
permanently connected to –VIN. The module will then
produce an output whenever a valid input source is applied.
Vo Bus:
Produces a positive power output with respect
to ‘VO COM’. This is the main output from the converter
when operated in a stand-alone configuration. It is dc-
isolated from the input power pins and is the first output
to rise when the converter is either powered or enabled.
In power-up sequencing applications, this output can
provide a 3.3-V standby source to power the downstream
non-isolated modules.
Vo Seq:
This is the sequenced output voltage from the
converter. This voltage can be directly controlled from
the Track pin. During power up, VO Seq will rise with
the Track pin voltage, typically 20 ms after the VO Bus
output has reached regulation.
Vo COM:
This is the output power return for both the
‘VO Bus’ and ‘VO Seq’ output voltages. This node should
be connected to the load circuit common.
Track:
The voltage at this pin directly controls the voltage
at the ‘VO Seq’ regulated output. It is primarily used
to sequence the voltage at ‘VO Seq’ with the regulated
outputs from any downstream non-isolated modules that
are powered from the converter’s ‘+VO Bus’ output. In
these applications, the ‘Track’ pin is simply connected
to the track control of each of the non-isolated mod-
ules. The ‘Track’ pin of the PTB78520W has an internal
transistor, which holds it at ‘VO COM’ potential for
approximately 20 ms after the ‘VO Bus’ output is in
regulation. Following this delay, the ‘Track’ voltage and
‘VO Seq’ will rise simultaneously with the output voltage
from all the non-isolated modules, that are under the con-
trol of Auto-Track.
Vo Adjust:
A resistor must be connected between this pin
and ‘–Sense’ to set the converter’s output voltage. A
0.05-W rated resistor may be used, with tolerance and
temperature stability of 1% and 100 ppm/°C, respectively.
If this pin is left open, the converter output voltage will
default to its lowest value. The specification table gives
the preferred resistor values for the popular bus voltages.
+Sense:
The ‘+Sense’ pin can be connected to either the
‘VO Bus’ or ‘VO Seq’ outputs. When connected to ‘VO Seq’,
remote sense compensation will be delayed until the
power-up sequence is complete. The voltage at ‘Vo Bus’
will also be raised slightly. The pin may be left open
circuit, but connecting it to one of the output terminals
improves load regulation of that output.
–Sense:
Provides the converter with a remote sense capa-
bility when used in conjunction with +Sense. For optimum
output voltage accuracy this pin should always be connected
to ‘VO COM’. This pin is also the reference connec-
tion for the output voltage set-point resistor.
Ordering Information
Package Options (PTB78520x
)
Code
Description
Pkg Ref. (1)
AH
Horiz. T/H
(ERP)
AS
SMD, Standard (2)
(ERQ)
Output Voltage (PTB78520
xx)
Code
Voltage
W
1.8 V to 3.6 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.
PTB78520W
20-A, 18–60-V Input Auto-Track
Compatible Isolated DC/DC Converter
SLTS226A – JULY 2004 – REVISED OCTOBER 2005
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PTB78520WAS | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTB78520WAH | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTB78560CAH | 1-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE |
| PTB78560AAH | 1-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE |
| PTB78560CAS | 1-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PTB78520WAH | 功能描述:DC/DC轉(zhuǎn)換器 20A 18-60V Inp Auto- Trk Compat Iso DC/DC RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| PTB78520WAS | 功能描述:DC/DC轉(zhuǎn)換器 20A 18-60V Inp Auto- Trk Compat Iso DC/DC RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| PTB78560A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:30-W, 24-V/48-V INPUT DC/DC CONVERTERS WITH AUTO-TRACK SEQUENCING |
| PTB78560AAH | 功能描述:DC/DC轉(zhuǎn)換器 30-W 24-V/48V Input DC/DC Converter RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| PTB78560AAS | 功能描述:DC/DC轉(zhuǎn)換器 30-W 24-V/48V Input DC/DC Converter RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
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