- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄66037 > PT4502C (TEXAS INSTRUMENTS INC) 1-OUTPUT 20 W DC-DC REG PWR SUPPLY MODULE PDF資料下載
參數(shù)資料
| 型號： | PT4502C |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 20 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT, SMD-12 |
| 文件頁數(shù)： | 8/10頁 |
| 文件大?。?/td> | 211K |
| 代理商： | PT4502C |
Application Notes
For technical support and more information, see inside back cover or visit www.ti.com
Using the Remote On/Off Function on the PT4500/
PT4520 Series of Isolated DC/DC Converters
For applications requiring output voltage on/off control,
the PT4500/4520 series of DC/DC converters incorporate
a remote on/off function. This function may be used in
applications that require battery conservation, power-up/
shutdown sequencing, and/or to coordinate the power-up
of the regulator for active in-rush current control. (See
the related application note, SLTA021).
This function is provided by the Remote On/Off control,
pin1. If pin 1 is left open-circuit, the converter provides
a regulated output whenever a valid source voltage3 is
applied between +Vin(pin 4, 5), and –Vin (pin 2, 3).
Connecting pin 1 to pin 2, or applying a low-level signal
to pin 1 (with respect to –Vin), 1 will disable the regulator
output 5.
Table 3-1 provides details of the interface requirements
for the Remote On/Off pin. Figure 3-1 shows how a discrete
MOSFET (Q1), may be referenced to the negative input
voltage rail and used with this control input.
Table 3-1 Inhibit Control Requirements 1
Parameter
Min
Max
Enable (VIH)
2.5V
(Open Circuit) 4
Disable (VIL)
–0.3V
0.8V
Notes:
1. The on/off control uses -Vin (pin 1), on the primary
side of the converter, as its ground reference. All
voltages specified are with respect to -Vin.
2. The on/off control internal circuitry is a high
impedance 10A current source. The open-circuit
voltage may be as high as 8.3Vdc.
3. The PT4500/20 series incorporates an “Under-Voltage
Lockout” (UVLO) function. The UVLO prevents
operation of the converter when there is sufficient input
voltage to support a regulated output. Below the UVLO
threshold voltage, there is no output from the module
and the Remote On/Off control is inoperative.
4. The Remote On/Off input of the PT4500/20 series
must be controlled with a low-leakage (<100nA) open-
drain MOSFET.
Do not use a pull-up resistor.
5. When the converter output is disabled, the current
drawn from the input supply is typically reduced to
8mA (16mA maximum).
6. Keep the on/off transition to less than 1ms. This
prevents erratic operation of the ISR, whereby the
output voltage may drift un-regulated between 0V
and the rated output during power-up.
Figure 3-1
Turn-On Time:
The converter typically produces a fully
regulated output voltage within 35ms after the removal
of the low voltage signal from the Remote On/Off pin.
Using the circuit of Figure 3-1, Figure 3-2 shows the
output voltage and input current waveforms of a PT4521
after Q1 is turned off. The turn off of Q1 corresponds to
the drop in Q1 Vgs voltage. The waveforms were mea-
sured with a 48Vdc input voltage, and 2.75-A resistive
load.
Figure 3-2
+V
in
– V
in
+V
o
– V
o
Q1
BSS138
V
GS
Note 4
PT4500/4520
+ Vout
–Vout
+Vin
–Vin
Remote
On/Off
V
o (adj)
1
2, 3
4, 5
9,10
7, 8
6
PT4500/4520 Series
Vout (2V/Div)
Iin (0.2A/Div)
Q1 Vgs (10V/Div)
HORIZ. SCALE: 5ms/Div
相關PDF資料 |
PDF描述 |
|---|---|
| PT4508C | 1-OUTPUT 12.5 W DC-DC REG PWR SUPPLY MODULE |
| PT4504A | 1-OUTPUT 20 W DC-DC REG PWR SUPPLY MODULE |
| PT4502A | 1-OUTPUT 20 W DC-DC REG PWR SUPPLY MODULE |
| PT4509A | 1-OUTPUT 6 W DC-DC REG PWR SUPPLY MODULE |
| PT4509C | 1-OUTPUT 6 W DC-DC REG PWR SUPPLY MODULE |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| PT4502N | 功能描述:DC/DC轉(zhuǎn)換器 20W 24V 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）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸: |
| PT4503 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:20-W 24-V Input Isolated DC/DC Converter |
| PT-4503 | 功能描述:線性和開關式電源 45.2W 3.3 5 12V RoHS:否 制造商:TDK-Lambda 產(chǎn)品:Switching Supplies 開放式框架/封閉式:Enclosed 輸出功率額定值:800 W 輸入電壓:85 VAC to 265 VAC 輸出端數(shù)量:1 輸出電壓（通道 1）:20 V 輸出電流（通道 1）:40 A 商用/醫(yī)用: 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風格:Rack 長度: 寬度: 高度: |
| PT-4503_11 | 制造商:MEANWELL 制造商全稱:Mean Well Enterprises Co., Ltd. 功能描述:45W Triple Output with 3.3V output |
| PT4503A | 功能描述:DC/DC轉(zhuǎn)換器 12V 20W 24V-Input 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）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸: |
發(fā)布緊急采購，3分鐘左右您將得到回復。