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參數(shù)資料
| 型號(hào)： | PT4222A |
| 英文描述： | A 30V Single N-Channel HEXFET Power MOSFET in a DirectFET MX package rated at 136 amperes optimized with low on resistance for applications such as active OR'ing. Shipped in Tape and Reel only. Part is not available in bulk, TR is implied in part number.; A IRF6612 with Standard Tape and Reel Quantity of 4800 |
| 中文描述： | 模擬IC |
| 文件頁(yè)數(shù)： | 4/7頁(yè) |
| 文件大小： | 171K |
| 代理商： | PT4222A |
For technical support and more information, see inside back cover or visit www.ti.com
Application Notes
PT4220/4240 Series
Using the Remote On/Off with the PT4220/4240
Isolated 10W Excalibur
DC/DC Converters
For applications requiring output voltage On/Off control,
the PT4220/4240 DC/DC converter series incorporates
a
“Remote On/Off”
control (pin 1). This feature can be
used to switch the module off without removing the
applied input source voltage.
The converter functions normally with Pin 1 open-circuit,
providing a regulated output voltage when a valid source
voltage is applied to +V
in
(pin 5), with respect to –V
in
(pin 3). When a low-level
1
ground signal is applied to
pin 1, the converter output will be turned off.
Figure 1 shows an application schematic, which details
the typical use of the
Remote On/Off
function. Note the
discrete transistor (Q1). The pin has its own internal
pull-up, allowing it to be controlled with an open-collector
or open-drain device (See notes 2 & 3). Table 1 gives the
threshold requirements.
When placed in the “Off” state, the standby current drawn
from the input source is typically reduced to less than 1mA.
Table 1; Pin 1 Remote On/Off Control Parameters
1
Parameter
Min
Typ
Max
Enable (VIH)
Disable (VIL)
Vo/c [Open-Circuit]
Iin [pin 1 at –Vin]
4.5V
—
—
—
5.0V
—
—
0.8V
—
–0.5mA
Notes:
1. The
Remote On/Off
control uses –V
in
(pin 3) as its ground
reference. All voltages specified are with respect to –V
in
.
2. Use an open-collector device (preferably a discrete
transistor) for the
Remote On/Off
input. A pull-up resistor
is not necessary. To disable the output voltage, the control
pin should be pulled low to less than +0.8VDC.
3. The
Remote On/Off
pin may be controlled with devices that
have a totem-pole output. This is provided the drive
voltage meets the threshold requirements in Table 1.
Do not
apply more than +20V. If a TTL gate is used, a
pull-up resistor may be required to the logic supply voltage.
4. The PT4220/4240 converters incorporate an “Under-
Voltage Lockout” (UVLO). The UVLO will keep the
module off when the input voltage to the converter is
low, regardless of the state of the
Remote On/Off
control.
Table 2 gives the UVLO input voltage thresholds.
Figure 1
Turn-On Time:
In the circuit of Figure 1, turning Q
1
on
applies a low-voltage to pin 1 and disables the converter
output. Correspondingly, turning Q
1
off allows pin 1
to
be pulled high by an internal pull-up resistor. The con-
verter produces a regulated output voltage within 60ms.
Figure 2 shows shows the output response of a PT4223
(5.0V) following the turn-off of Q
1
. The turn off of Q
1
corresponds to the drop in Q
1
Vgs. Although the rise-
time of the output voltage is short (<5ms), the indicated
delay time will vary depending upon the input voltage
and the module’s internal timing. The waveform was
measured with a 48Vdc input voltage, and a 1.4A resis-
tive load.
Figure 2
R1
10k
Q1
BSS138
+V
o
-V
o
+V
in
-V
in
Vdd
1 =OFF
Note 1
U1a
Note 1
Note 1
PT4220/4240
+Vout
-Vout
+Vin
-Vin
Remote
On/Off
V
o
(adj)
1
3
5
8, 9
6, 7
10
Table 2; UVLO Thresholds
4
Series
V
in
Range
UVLO Threshold
PT4220
PT4240
36 – 75V
18 – 36V
32V ±2V
15.8V ±2V
Vo (2V/Div)
Iin (0.2A/Div)
Q1Vgs (10V/Div)
HORIZ SCALE: 10ms/Div
Delay Time
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PT4222C | Analog IC |
| PT4222N | Analog IC |
| PT4223 | 100V Single N-Channel HEXFET Power MOSFET in a TO-220 FullPak (Iso) package; A IRLI540N with Standard Packaging |
| PT4223A | 100V Single N-Channel HEXFET Power MOSFET in a TO-220 FullPak (Iso) package; Similar to IRLI540N with Lead Free Packaging |
| PT4223C | 150V Single N-Channel HEXFET Power MOSFET in a TO-262 package; A IRF3515L with Standard Packaging |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PT4222C | 功能描述:DC/DC轉(zhuǎn)換器 3.3Vout 10W 48V-Inp Iso 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: |
| PT4222N | 功能描述:CONVERTER DC-DC 3.3VIN 3.0A VRT RoHS:是 類別:電源 - 板載 >> DC DC Converters 系列:PT4220 標(biāo)準(zhǔn)包裝:10 系列:PT4570 類型:隔離 輸出數(shù):1 電壓 - 輸入（最?。?36V 電壓 - 輸入（最大）:75V Voltage - Output 1:9V Voltage - Output 2:- Voltage - Output 3:- 電流 - 輸出（最大）:3.3A 電源（瓦） - 制造商系列:30W 電壓 - 隔離:1.5kV（1500V） 特點(diǎn):- 安裝類型:表面貼裝 封裝/外殼:19-SIP SMD 模塊 尺寸/尺寸:3.00" L x 1.19" W x 0.50" H（76.2mm x 30.2mm x 12.7mm） 包裝:托盤 工作溫度:-40°C ~ 85°C 效率:84% 電源（瓦特）- 最大:30W |
| PT4223 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:5.0Vout 10W 48V-Input Isolated DC/DC Converter |
| PT4223A | 功能描述:DC/DC轉(zhuǎn)換器 5.0Vout 10W 48V-Inp Iso 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: |
| PT4223C | 功能描述:DC/DC轉(zhuǎn)換器 5.0Vout 10W 48V-Inp Iso 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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