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參數(shù)資料
| 型號： | PT5408C |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 6 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, MSMA5 |
| 封裝： | ROHS COMPLIANT, METAL, SMD-5 |
| 文件頁數(shù)： | 15/16頁 |
| 文件大?。?/td> | 304K |
| 代理商： | PT5408C |
Application Notes
For technical support and further information, visit http://power.ti.com
Using the Inhibit Control of the PT5400
SWIFT
Series of Power Modules
For applications requiring output voltage On/Off control,
the PT5400 series of SWIFT power modules incorporate
an inhibit function. This function can be used wherever
there is a requirement for the module to be switched
off. The On/Off function is provided by the Inhibit
(pin 1) control.
The ISR functions normally with Pin 1 open-circuit,
providing a regulated output whenever a valid source
voltage is applied to Vin, (pin 2). When a low-level2
ground signal is applied to pin 1, the regulator output
will be disabled.
Figure 3-1 shows an application schematic, which details
the typical use of the Inhibit function. Note the discrete
transistor (Q1). The Inhibit control has its own internal
pull-up to +Vin potential. An open-collector or open-drain
device is required to control this input 1. The Inhibit pin
control thresholds are given in Table 3-1.
Table 3-1; Inhibit Control Requirements
Parameter
Min
Max
Enable (VIH)Vin – 0.5
Open
Disable (VIL)
–0.2V
+0.5V
Notes:
1. Use an open-collector device (preferably a discrete
transistor) for the Inhibit input. A pull-up resistor is not
necessary. To disable the output voltage, the control pin
should be pulled low to less than +0.5VDC.
Figure 3-1
Turn-On Time:
In the circuit of Figure 3-1, turning Q1
on applies a low-voltage to the Inhibit control (pin 1)
and disables the regulator output. Correspondingly,
turning Q1 off allows the ISR to execute a soft-start
power up. The soft-start power up consists of a short
delay, td, followed by a period, t(SS), in which the output
voltage rises from zero to its full regulation voltage.
(See the section on Soft-Start Power Up). The module
produces a fully regulated output voltage within 25msec.
Figure 3-2 shows the typical rise in both output voltage
and input current for a PT5404 (1.8V), following the
turn-off of Q1. The turn off of Q1 corresponds to the
drop in the Q1 Vgs waveform. The time periods, td and
t(SS), are indicated. The waveforms were measured with
a 5Vdc input voltage, and 0.7-
resistive load.
Figure 3-2
C
1
100
F
+V
O
COM
+V
IN
COM
Inhibit
Q1
BSS138
PT5401
2
13
4
Vi n
Vo
GND
INH
t (SS)
d
t
Vout (1V/Div)
Iin (0.5A/Div)
HORIZ SCALE: 5ms/Div
Q1 Vgs (10V/Div)
PT5400 Series
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PT5408N | 功能描述:DC/DC轉(zhuǎn)換器 2.5V 6A 3.3V Input Adj SWIFT Module 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: |
| PT5410 | 制造商:Pulse Electronics Corporation 功能描述:- Bulk |
| PT5411 | 制造商:Pulse 功能描述:- Bulk |
| PT541-1 | 功能描述:固定電感器 MAGNETICS - ADSL RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm |
| PT541-1L | 制造商:Bourns / JW Miller 功能描述:Telecom Transformer 2:1 1500Vrms 0.6Ohm Prim. DCR <1dB Through Hole 制造商:Bourns Inc 功能描述:TELC TX 2:1 1500VRMS 0.6OHM PRIM. DCR 1DB TH - Bulk 制造商:Bourns Inc 功能描述:Telecom Transformer 2:1 1500Vrms 0.6Ohm Prim. DCR <1dB Through Hole |
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