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參數(shù)資料
| 型號(hào)： | PT6623G |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 6 A SWITCHING REGULATOR, 750 kHz SWITCHING FREQ-MAX, PSMA14 |
| 封裝： | PLASTIC, HORIZONTAL MOUNT PACKAGE-14 |
| 文件頁數(shù)： | 16/20頁 |
| 文件大?。?/td> | 523K |
| 代理商： | PT6623G |
Application Notes
For technical support and more information, see inside back cover or visit www.ti.com
PT6620 Series
Using the Standby Function on the PT6620 Series
of 12-V Bus Converters
For applications requiring output voltage On/Off control,
the 14-pin PT6620 ISR series incorporates a standby
function. This feature may be used for power-up/shut-
down sequencing, and wherever there is a requirement
for the output status of the module to be controlled by
external circuitry.
The standby function is provided by the STBY* control,
pin 3. If pin 3 is left open-circuit the regulator operates
normally, providing a regulated output whenever a valid
supply voltage is applied to Vin (pins 4, 5, & 6) with respect
to GND (pins 7-10). Connecting pin 3 to ground 1 will
disable the regulator output and reduce the input current
to less than 30 mA 3. Grounding the standby control will
also hold-off the regulator output during the period that
input power is applied.
The standby input is ideally controlled with an open-
collector (or open-drain) discrete transistor (See Figure 1).
It can also be driven directly from a dedicated TTL 2
compatible gate. Table 1 provides details of the threshold
requirements.
Table 1 Inhibit Control Thresholds (1,2)
Parameter
Min
Max
Enable (VIH)
1 V
5 V
Disable (VIL)
–0.1V
0.3V
Notes:
1. The Standby input on the PT6620 regulator series may be
controlled using either an open-collector (or open-drain)
discrete transistor, or a device with a totem-pole output. A
pull-up resistor is not necessary. The control input has an
open-circuit voltage of about 1.5 Vdc. To disable the
regulator output, the control pin must be “pulled” to less
than 0.3 Vdc with a low-level 0.25 mA max. sink to ground.
2. The Standby input on the PT6620 series is also compatible
with TTL logic. A standard TTL logic gate will meet the
0.3 V VIL(max) requirement (Table 1 ) at 0.25 mA sink
current. Do not drive the Standby control input above 5 Vdc.
3. When the regulator output is disabled the current drawn
from the input source is reduced to approximately 15 mA
(30 mA maximum).
4. The turn-off time of Q1, or rise time of the standby input
is not critical on the PT6620 series. Turning Q1 off slowly,
over periods up to 100 ms, will not damage the regulator.
However, a slow turn-off time will increase both the initial
delay and rate-of-rise of the output voltage.
Figure 1
Turn-On Time:
Turning Q1 in Figure 1 off, removes the
low-voltage signal at pin 3 and enables the output. The
PT6620 series of regulators will provide a fully regulated
output voltage within 20ms. The actual turn-on time may
vary with load and the total amount of output capacitance.
Figure 2 shows the typical output voltage waveform of a
PT6625 (5 V) following the prompt turn off of Q1 at time
t =0 secs. The waveform was measured with a 12-V input
voltage, and 5-A resistive load.
Figure 2
C
in
+
C
out
+
Inhibit
V
in
V
o
COM
Q1
BSS138
+5V V
in
PT6620
11,12,13
14
7,8,9,10
4,5,6
Vin
Vo
GND
Vo(adj)
STBY
3
Vsense
1
02468
10
12
14
16
18
t (milli - secs)
Vo (2V/Div)
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| PT6623L | 功能描述:REGULATOR 12V-2.5V 7A SIP W/CU H RoHS:否 類別:電源 - 板載 >> DC DC Converters 系列:PT6620 標(biāo)準(zhǔn)包裝:10 系列:PT4570 類型:隔離 輸出數(shù):1 電壓 - 輸入（最小）: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 |
| PT6623M | 功能描述:REGULATOR 12V-2.5V 7A SIP W/CU H RoHS:否 類別:電源 - 板載 >> DC DC Converters 系列:PT6620 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 |
| PT6623P | 功能描述:REGULATOR 12V-2.5V 7A SIP VERTIC RoHS:是 類別:電源 - 板載 >> DC DC Converters 系列:PT6620 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 |
| PT6623Q | 功能描述:REGULATOR 12V-2.5V 7A SIP W/CU RoHS:否 類別:電源 - 板載 >> DC DC Converters 系列:PT6620 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 |
| PT6623R | 功能描述:REGULATOR 12V-2.5V 7A SIP VERT H RoHS:否 類別:電源 - 板載 >> DC DC Converters 系列:PT6620 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 |
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