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参数资料
| 型号： | PT6705A |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 13 A SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, SMA17 |
| 封装： | SIP-17 |
| 文件页数： | 3/7页 |
| 文件大小： | 636K |
| 代理商： | PT6705A |
Application Notes
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
PT6705/6715 Series
Adjusting the Output Voltage of the PT6705 and
PT6715 Excalibur Converters
Both the PT6705 and PT6715 series ISRs are non-pro-
grammable versions of the PT6700 Excalibur family of
converters. These regulators have a fixed output voltage,
which may be adjusted higher or lower than the factory
trimmed pre-set voltage using a single external resistor. Table
1 gives the allowable adjustment range for each model as
V
a (min) and Va (max).
Adjust Up:
An increase in the output voltage is obtained by
adding a resistor R2, between pin 1 (Vo adjust) and pin 7
(–Remote Sense).
Adjust Down:
Add a resistor (R1), between pin 1 (Vo adjust)
and pin 17 (+Remote Sense).
Refer to Figure 1 and Table 2 for both the placement and value
of the required resistor, either (R1) or R2 as appropriate.
Notes:
1. Use only a single 1% resistor in either the (R1) or R2
location. Place the resistor as close to the ISR as
possible.
2. Never connect capacitors from Vo adjust to either
GND, Vout, or the Remote Sense pins. Any
capacitance added to the Vo adjust pin will affect the
stability of the ISR.
3. If the Remote Sense feature is not being used, pin 7
must be connected to pin 8 for optimum output voltage
accuracy. Correspondingly the resistors (R1) and R2
may be then be connected from Vo Adjust to either
Vout or GND respectively.
4. The PT6705 series requires a 12V external bias voltage
in order to operate (see data sheet). An external bias
voltage is not required for the PT6715 series.
5. Adjusting the output voltage of the PT6705 and
PT6715 (3.3V models) higher than the factory pre-
trimmed output voltage may require an increase in the
minimum input voltage. These two models must
comply with the following requirements for Vin(min).
PT670x models:
Vin(min)
= (Va + 1)V
PT671x models:
Vin(min)
= (Va + 1)V or 4.5V, whichever is greater.
Figure 1
L
O
A
D
(R1)
Adj Down
R2
Adjust
Up
C
out
+
C
in
+
COM
+5V
Vo
COM
PT6705/PT6715
Sns(+)
Sns(-)
V
out
G N D
Vo(adj)
V
in
Stby*
V
Bias
13 16
17
7
1
81 2
4,5,6
23
Bias
(Req’d for PT6705)
The values of (R1) [adjust down], and R2 [adjust up], can
also be calculated using the following formulas.
10
(Va – 1.27)
(R1)
=
(Vo – Va)
– Rs
k
12.7
– Rs
k
R2
=
Va - Vo
Where: V
o
= Original output voltage
V
a
= Adjusted output voltage
R
s
= Series resistance value from Table 1
Table 1
PT6705/PT6715 SERIES ADJUSTMENT PARAMETERS
Series Pt #
12V Bias (4)
PT6708
PT6707
PT6706
PT6705
No-Bias
PT6718
PT6717
PT6716
PT6715
Vo (nom)
1.5
1.8
2.5
3.3
Va (min)
1.47
1.75
2.25
2.75
Va (max)
1.73
2.0
2.85
3.75
Rs (k
)
49.9
33.2
24.9
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PT6705C | 功能描述:REGULATOR 3.3V 13A VADJ HRZ SMD RoHS:否 类别:电源 - 板载 >> DC DC Converters 系列:PT6700 标准包装:10 系列:PT4570 类型:隔离 输出数:1 电压 - 输入（最小）:36V 电压 - 输入（最大）:75V Voltage - Output 1:9V Voltage - Output 2:- Voltage - Output 3:- 电流 - 输出（最大）:3.3A 电源（瓦） - 制造商系列:30W 电压 - 隔离:1.5kV（1500V） 特点:- 安装类型:表面贴装 封装/外壳:19-SIP SMD 模块 尺寸/尺寸:3.00" L x 1.19" W x 0.50" H（76.2mm x 30.2mm x 12.7mm） 包装:托盘 工作温度:-40°C ~ 85°C 效率:84% 电源（瓦特）- 最大:30W |
| PT6705N | 功能描述:REGULATOR 3.3V 13A VADJ VERT RoHS:否 类别:电源 - 板载 >> DC DC Converters 系列:PT6700 标准包装:10 系列:PT4570 类型:隔离 输出数:1 电压 - 输入（最小）:36V 电压 - 输入（最大）:75V Voltage - Output 1:9V Voltage - Output 2:- Voltage - Output 3:- 电流 - 输出（最大）:3.3A 电源（瓦） - 制造商系列:30W 电压 - 隔离:1.5kV（1500V） 特点:- 安装类型:表面贴装 封装/外壳:19-SIP SMD 模块 尺寸/尺寸:3.00" L x 1.19" W x 0.50" H（76.2mm x 30.2mm x 12.7mm） 包装:托盘 工作温度:-40°C ~ 85°C 效率:84% 电源（瓦特）- 最大:30W |
| PT6706A | 功能描述:REGULATOR 2.5V 13A VADJ HRZ RoHS:否 类别:电源 - 板载 >> DC DC Converters 系列:PT6700 标准包装:10 系列:PT4570 类型:隔离 输出数:1 电压 - 输入（最小）:36V 电压 - 输入（最大）:75V Voltage - Output 1:9V Voltage - Output 2:- Voltage - Output 3:- 电流 - 输出（最大）:3.3A 电源（瓦） - 制造商系列:30W 电压 - 隔离:1.5kV（1500V） 特点:- 安装类型:表面贴装 封装/外壳:19-SIP SMD 模块 尺寸/尺寸:3.00" L x 1.19" W x 0.50" H（76.2mm x 30.2mm x 12.7mm） 包装:托盘 工作温度:-40°C ~ 85°C 效率:84% 电源（瓦特）- 最大:30W |
| PT6706C | 功能描述:REGULATOR 2.5V 13A VADJ HRZ SMD RoHS:否 类别:电源 - 板载 >> DC DC Converters 系列:PT6700 标准包装:10 系列:PT4570 类型:隔离 输出数:1 电压 - 输入（最小）:36V 电压 - 输入（最大）:75V Voltage - Output 1:9V Voltage - Output 2:- Voltage - Output 3:- 电流 - 输出（最大）:3.3A 电源（瓦） - 制造商系列:30W 电压 - 隔离:1.5kV（1500V） 特点:- 安装类型:表面贴装 封装/外壳:19-SIP SMD 模块 尺寸/尺寸:3.00" L x 1.19" W x 0.50" H（76.2mm x 30.2mm x 12.7mm） 包装:托盘 工作温度:-40°C ~ 85°C 效率:84% 电源（瓦特）- 最大:30W |
| PT6706N | 功能描述:REGULATOR 2.5V 13A VADJ VERT RoHS:否 类别:电源 - 板载 >> DC DC Converters 系列:PT6700 标准包装:10 系列:PT4570 类型:隔离 输出数:1 电压 - 输入（最小）:36V 电压 - 输入（最大）:75V Voltage - Output 1:9V Voltage - Output 2:- Voltage - Output 3:- 电流 - 输出（最大）:3.3A 电源（瓦） - 制造商系列:30W 电压 - 隔离:1.5kV（1500V） 特点:- 安装类型:表面贴装 封装/外壳:19-SIP SMD 模块 尺寸/尺寸:3.00" L x 1.19" W x 0.50" H（76.2mm x 30.2mm x 12.7mm） 包装:托盘 工作温度:-40°C ~ 85°C 效率:84% 电源（瓦特）- 最大:30W |
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