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參數(shù)資料
| 型號(hào)： | PT6473 |
| 英文描述： | 2V 14A. 3.3-V Input Adjustable Step-Down ISR |
| 中文描述： | 2V的第14A條。 3.3 - V輸入可調(diào)降壓ISR的 |
| 文件頁(yè)數(shù)： | 9/10頁(yè) |
| 文件大?。?/td> | 181K |
| 代理商： | PT6473 |
Application Notes
For technical support and more information, see inside back cover or visit www.ti.com
Using the Inhibit Control of the PT6460 & PT6470
Series of Step-Down ISRs
The PT6460 (5-V input) and the PT6470 (3.3-V input)
series of integrated switching regulators (ISRs) provide
step-down voltage conversion for output loads of up to
14 A. For applications that require the output voltage
to be held off, these ISRs incorporate an
Inhibit*
control
(pin 1). The
Inhibit*
control input can be used for power-
up sequencing or whenever there is a requirement for
the output voltage from the ISR to be turned off.
The ISR functions normally with pin 1 open circuit,
providing a regulated output whenever a valid source
voltage is applied between
V
in
(pins 2–3) and
GND
(pins
5–8). When a low-level
ground signal is applied to pin 1,
the regulator output is turned off
2
and the input current
is significantly reduced
3
.
Figure 4-1 shows the typical application of the
Inhibit*
function. Note the discrete transistor, Q
1
. The
Inhibit*
control has its own internal pull-up to V
in
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)
Disable (VIL)
I IL
Vin – 0.5 V
–0.2 V
—
—
—
Open
+0.8 V
—
–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*
control 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 1) the module output is effectively turned off (tri-
state). The output voltage decays to zero as the load
impedance discharges the output capacitors.
3. When the output is disabled via the
Inhibit*
pin, the
input current is reduced to approximately 5 to 10 mA.
Figure 4-1
Turn-On Time:
In the circuit of Figure 4-1, turning Q
1
on
applies a low-voltage to the
Inhibit*
control (pin 1) and
disables the output of the regulator
2
. If Q
1
is then turned
off, the ISR executes a soft-start power up. Power up
consists of a short delay (approx. 2 msec), followed by a
period in which the output voltage rises to the full regu-
lation voltage. The module produces a regulated output
voltage within 10 msec. Figure 4-2 shows the typical rise
in both the output voltage and input current for a PT6464
(1.8 V), following the turn-off of Q
1
. The turn off of Q
1
corresponds to the rise in the waveform, Q
1
V
ds
. The
waveforms were measured with a 5VDC input voltage,
and 8.5-A load.
Figure 4-2
Vo (1V/Div)
Iin (2A/Div)
Q1Vds (5V/Div)
HORIZ SCALE: 2ms/Div
PT6460 & PT6470 Series
C
560 μF
(Req'd)
COM
+V
IN
+
PT6464
2
–
4
5
–
8
12
9
–
10
Vin
Vout
Vo(adj)
GND
1
Inhibit*
C
330 μF
(Optional)
+Vsense
+
11
1 =Inhibit
Q
BSS138
L
O
A
D
GND
V
OUT
+V
SENSE
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PT6473A | 功能描述:REG 2.0V 14A 3.3VIN ADJ HORZ RoHS:否 類(lèi)別:電源 - 板載 >> DC DC Converters 系列:PT6470 設(shè)計(jì)資源:VI-200, VI-J00 Design Guide, Appl Manual 標(biāo)準(zhǔn)包裝:1 系列:* 類(lèi)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(diǎn):* 安裝類(lèi)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:* |
| PT6473C | 功能描述:REG 2.0V 14A 3.3VIN ADJ SMD RoHS:否 類(lèi)別:電源 - 板載 >> DC DC Converters 系列:PT6470 設(shè)計(jì)資源:VI-200, VI-J00 Design Guide, Appl Manual 標(biāo)準(zhǔn)包裝:1 系列:* 類(lèi)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(diǎn):* 安裝類(lèi)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:* |
| PT6473N | 功能描述:REG 2.0V 14A 3.3VIN ADJ VERT RoHS:否 類(lèi)別:電源 - 板載 >> DC DC Converters 系列:PT6470 設(shè)計(jì)資源:VI-200, VI-J00 Design Guide, Appl Manual 標(biāo)準(zhǔn)包裝:1 系列:* 類(lèi)型:隔離 輸出數(shù):1 電壓 - 輸入（最小）: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(diǎn):* 安裝類(lèi)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:* |
| PT6474 | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:1.8V 14A. 3.3-V Input Adjustable Step-Down ISR |
| PT6474A | 功能描述:REG 1.8V 14A 3.3VIN ADJ HORZ RoHS:否 類(lèi)別:電源 - 板載 >> DC DC Converters 系列:PT6470 設(shè)計(jì)資源:VI-200, VI-J00 Design Guide, Appl Manual 標(biāo)準(zhǔn)包裝:1 系列:* 類(lèi)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(diǎn):* 安裝類(lèi)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:* |
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