- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384923 > SMM150NR00 (Summit Microelectronics, Inc.) Single-Channel Supply Voltage Marginer/Monitor PDF資料下載
參數(shù)資料
| 型號： | SMM150NR00 |
| 廠商： | Summit Microelectronics, Inc. |
| 英文描述： | Single-Channel Supply Voltage Marginer/Monitor |
| 中文描述： | 單通道電源電壓Marginer /監(jiān)視器 |
| 文件頁數(shù)： | 12/22頁 |
| 文件大?。?/td> | 388K |
| 代理商： | SMM150NR00 |
SMM150
Preliminary Information
Summit Microelectronics, Inc
2075 2.6 05/13/05
12
Maximizing Accuracy
Maximum margining accuracy is obtained by placing a
resistor between the SMM150 TRIM output and the
TRIM input of the converter. From the manufacturer’s
data sheet obtain the value of the internal voltage
reference and equivalent TRIM input series resistance.
Figure 7 below displays the internal trimming circuit for
a typical isolated DC-DC converter. In this example,
the converter uses positive trimming, i.e., an increase
in voltage at the TRIM pin causes an increase in
output voltage.
DC-DC
Converter
TRIM
VREF
V-
V+
-S
+S
L
O
A
D
VREF
R
TRIM
SMM150
TRIM Pin
R1
R2
Figure 7 - Simplified TRIM circuit of an isolated DC-DC converter connects to SMM150 TRIM output
For this example R
TRIM
is found:
(
2×
(
=
×
1-
VREF
Where:
Low
VM
)
arg(
k
=
)
(
)
(
)
×
-0.3
-0.3)
-0.3
-0.3
TRIM
R
VREF k
VREF
k VREF
R
VNom
0.3 = TRIM output saturation voltage
Vnom = Nominal (non-trimmed output voltage)
The next example applies to most non-isolated DC-DC
converters, LDO’s and in-system designed converters
using monolithic PWM controllers. Figure 8 is a
simplified schematic showing the resistor divider
network used to close the loop from the output to the
circuit’s feedback node. These type circuits employ
negative trimming, meaning any decrease in voltage
into the feedback node cause an increase in output
voltage.
(
(
×
-1
VNom
k
High
VM
)
arg(
k
=
)
)
1×
-0.3
=
TRIM
R
R
VREF
VNom
0.3 = TRIM output saturation voltage
Vnom = Nominal (non-trimmed output voltage)
VOUT
To FB node
(VREF)
R
TRIM
SMM150
TRIM Pin
R1
R2
Figure 8 - Simplified TRIM circuit of a non-isolated DC-DC converter connects to SMM150 TRIM output
APPLICATIONS INFORMATION (CONTINUED)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SMM150NR01 | Single-Channel Supply Voltage Marginer/Monitor |
| SMM150NR02 | Single-Channel Supply Voltage Marginer/Monitor |
| SMM150NR03 | Single-Channel Supply Voltage Marginer/Monitor |
| SMM150NR04 | Single-Channel Supply Voltage Marginer/Monitor |
| SMM150NR05 | Single-Channel Supply Voltage Marginer/Monitor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SMM150NR01 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Single-Channel Supply Voltage Marginer/Monitor |
| SMM150NR02 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Single-Channel Supply Voltage Marginer/Monitor |
| SMM150NR03 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Single-Channel Supply Voltage Marginer/Monitor |
| SMM150NR04 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Single-Channel Supply Voltage Marginer/Monitor |
| SMM150NR05 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Single-Channel Supply Voltage Marginer/Monitor |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。