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| 型号： | PT6426D |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 5 A SWITCHING REGULATOR, 800 kHz SWITCHING FREQ-MAX, PSIP14 |
| 封装： | ROHS COMPLIANT, SIP-14 |
| 文件页数： | 3/5页 |
| 文件大小： | 524K |
| 代理商： | PT6426D |
Application Notes
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
PT6420 Series
Adjusting the Output Voltage of the PT6420 Series
3AMP 5V Bus Converters
The output voltage of the Power Trends PT6420 Series
ISRs may be adjusted higher or lower than the factory
trimmed pre-set voltage with the addition of a single
external resistor. Table 1 accordingly gives the allowable
adjustment range for each model in the series as V
a (min)
and V
a (max).
Adjust Up:
(See note 1) An increase in the output voltage
is obtained by adding a resistor R1, between pin 14 (V
o
adjust) and pins 11-13 (V
out).
Adjust Down:
(See note 1) Add a resistor (R2), between
pin 14 (V
o adjust) and pins 7-10 (GND).
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. The direction in which each resistor adjusts the output of
the PT6420 series differs from many other Power Trends
products. These output voltage adjustment notes are
therefore specific only to the PT6420 models.
2. Use only a single 1% resistor in either the R1 or (R2)
location. Place the resistor as close to the ISR as possible.
3. Never connect capacitors from V
o adjust to either GND,
V
out, or the Remote Sense pin. Any capacitance added to
the V
o adjust pin will affect the stability of the ISR.
4. The PT6420 incorporates a Remote Sense (See Figure 1).
If this feature is being used, connecting the resistor R1
between pin 14 (V
o adjust) and pin 1 (Remote Sense) can
benefit load regulation.
5. An increase in the output voltage may place additional
limits on the input voltage range of the part. The revised
minimum input voltage will be (V
out + 1.2) or 4.5V,
whichever is higher. Do not exceed 5.5Vdc.
Table 1
PT6420 ADJUSTMENT RANGE
Series Pt #
PT6428
PT6424
PT6426
PT6427
PT6429
PT6425
Vo (nom)
1.2
1.5
1.8
2.1
2.5
3.3
Va (min)
1.1
1.3
1.5
1.8
2.1
2.8
Va (max)
1.41.8
2.2
2.6
3.1
3.8
Figure 1
R1
Adjust
Up
C1
100
F
C2
100
F
Vo
COM
Vin
+
(R2)
Adj Down
L
O
A
D
PT6420
11,12,13
14
7,8,9,10
4,5,6
Vin
V o
G N D
Vo(adj)
1
Vsense
The values of R1 [adjust up], and (R2) [adjust down], can
also be calculated using the following formulae.
12.45 Vo
R1
=
(Va – Vo)
– 49.9
k
12.45 (2Va – Vo) – 49.9 k
(R2)
=
Vo – Va
Where:
V
o
= Original output voltage
V
a
= Adjusted output voltage
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PT6426E | 功能描述:开关变换器、稳压器与控制器 ADJ STEP-DOWN ISR RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| PT6426P | 功能描述:REGULTR 1.8V 3A SYNC 14XL VERT RoHS:否 类别:电源 - 板载 >> DC DC Converters 系列:PT6420 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 |
| PT6427 | 制造商:TI 制造商全称:Texas Instruments 功能描述:3 AMP ADJUSTABLE INTEGRATED SWITCHING REGULATOR |
| PT6427D | 功能描述:REGULTR 2.1V 3A SYNC 14XL HORZ RoHS:是 类别:电源 - 板载 >> DC DC Converters 系列:PT6420 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 |
| PT6427P | 功能描述:REGULTR 2.1V 3A SYNC 14XL VERT RoHS:否 类别:电源 - 板载 >> DC DC Converters 系列:PT6420 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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