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參數(shù)資料
| 型號： | PT5813A |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 20 A SWITCHING REGULATOR, 350 kHz SWITCHING FREQ-MAX, MSIP18 |
| 封裝： | SIP-18 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 226K |
| 代理商： | PT5813A |
For technical support and more information, see inside back cover or visit www.ti.com
Application Notes
Using the Inhibit Control of the PT5800 & PT5810
Series of Step-Down ISRs
For applications requiring output voltage On/Off control,
the PT5800 & PT5810 series of ISRs incorporate an
inhibit function. This function can be used wherever there
is a requirement for the output voltage from the ISR to be
turned off. The On/Off function is provided by the Inhibit*
control (pin 2).
The ISR functions normally with pin 2 open-circuit,
providing a regulated output whenever a valid source
voltage is applied between Vin (pins 5–7) and GND (pins
9–13). When a low-level ground signal is applied to
pin 2, the regulator output is turned off 2.
Figure 4-1 shows the typical application 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 recommended to
control this input 1. The voltage thresholds are given in
Table 4-1.
Table 4-1; Inhibit Control Requirements
Parameter
Min
Typ
Max
Enable (VIH)Vin – 0.5 V
—
Open
Disable (VIL)
–0.2 V
—
+0.6 V
I IL
—
–0.2 mA
—
Notes:
1. Use an open-collector device with a breakdown voltage
of at least 10 V (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 +0.8 VDC.
2. When a ground signal is applied to the Inhibit* control
(pin 2) the module output is turned off (tri-state). The
output voltage decays to zero as the load impedance
discharges the output capacitors.
Figure 4-1
Turn-On Time:
In the circuit of Figure 4-1, turning Q1 on
applies a low-voltage to the Inhibit* control (pin 2) and
disables the output of the regulator 2. If Q1 is then turned
off, the ISR executes a soft-start power up. Power up
consists of a short delay (approx. 2msec), followed by a
period in which the output voltage rises to its full regu-
lation voltage. The module produces a regulated output
voltage within 10msec. Figure 4-2 shows the typical rise
in both the output voltage and input current for a PT5812
(2.5 V), following the turn-off of Q1. The turn off of Q1
corresponds to the rise in the waveform, Q1 Vds. The
waveforms were measured with a 3.3 VDC input voltage,
and 10-A load.
Figure 4-2
Vo (1V/Div)
Iin (5A/Div)
Q1 Vds (2V/Div)
HORIZ SCALE: 2ms/Div
PT5800 & PT5810 Series
V
IN
C
IN
1,000 F
+
C
OUT
330 F
+
1 =Inhibit
GND
V
OUT
Output Sense (+)
Output Sense (–)
Q
1
BSS138
PT5812
9–13
4
118
14–17
5, 6, 7
8
2
3
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| PT5813C | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.8V 20-A 3.3V Inpt Adj Step-Down ISR RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| PT5813N | 功能描述:REG 1.8V 20A 3.3VIN VERT RoHS:否 類別:電源 - 板載 >> DC DC Converters 系列:PT5810 設計資源:VI-200, VI-J00 Design Guide, Appl Manual 標準包裝:1 系列:* 類型:隔離 輸出數(shù):1 電壓 - 輸入（最?。?55V 電壓 - 輸入（最大）:100V Voltage - Output 1:15V Voltage - Output 2:- Voltage - Output 3:- 電流 - 輸出（最大）:* 電源（瓦） - 制造商系列:200W 電壓 - 隔離:* 特點:* 安裝類型:通孔 封裝/外殼:9-FinMod 尺寸/尺寸:4.60" L x 1.86" W x 0.79" H（116.8mm x 47.2mm x 20.1mm） 包裝:散裝 工作溫度:-55°C ~ 85°C 效率:* 電源（瓦特）- 最大:* |
| PT5814 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1.5V 20-A. 3.3-V Input Adjustable Step-Down ISR |
| PT5814A | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.5V 20-A 3.3V Inpt Adj Step-Down ISR RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| PT5814C | 功能描述:DC/DC轉(zhuǎn)換器 1.5V 20-A 3.3V Inpt Adj Step-Down ISR 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: |
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