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參數(shù)資料
| 型號(hào)： | SP6122EB |
| 英文描述： | Evaluation Board Manual |
| 中文描述： | 評(píng)估板手冊(cè) |
| 文件頁數(shù)： | 3/6頁 |
| 文件大?。?/td> | 316K |
| 代理商： | SP6122EB |
Rev. 5/23/01
SP6122 Evaluation Board Manual
Copyright 2001 Sipex Corporation
3
SP612 Evaluation Board Divider Resistors: The values of R1 and R2 are selected
to program 1.9V output, with 1.5V trim voltage Vb, and R1 = 500ohm:
i3 = (Vout-Vb)/R1=(1.9-1.5)/500 = 800uA.
The external voltage divider will add only 800uA to the load.
Divider Resistor R2 is:
R2 = Vb/(i3-i1)=1.5/(800uA-20uA) = 1.9K
The user of the SP6122 Evaluation Board can use the above equations for i3 and R2 to
modify R2 and change the output voltage to be any voltage from Vb (1.5V) to as high as
the input voltage. And if you want the output voltage to be the preset voltage Vb (1.5V),
just short a wire across R1.
Vout
Figure 1. Schematic: Output Voltage Divider Resistors
POWER SUPPLY DATA
The SP6122 is engineered for size and minimum pin count, yet has a very accurate
1.5% reference over line, load and temperature. Figure 2 data shows a typical SP6122
Evaluation Board Efficiency plot, with efficiencies to 88% and output currents to 4A.
Load Regulation plot in Figure 3 shows an essentially flat response of only 3mV change
for up to 4A load. Figure 4 Line Regulation illustrates a 1.90V output that varies only
4mV or 0.2% for an input voltage change from 3.3V to 5.5V. While data on individual
power supply boards may vary, the capability of the SP6122 of achieving high accuracy
over load and line shown here is quite impressive and desirable for accurate power
supply design.
Rin1
Va
Rin2
62.5K
R1
500
Vb
R2
+
-
Error
Amplifier
+
-
1.25
SP6122
i1
i3
i2
Pin3
1.9K
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP6122UEB | Evaluation Board Manual |
| SP6122ACU-1.5 | Low Voltage, Micro 8, PFET, Buck Controller Ideal for 1A to 5A, Small Footprint, DC-DC Power Converters |
| SP6122 | Low Voltage, Micro 8, PFET, Buck Controller Ideal for 1A to 5A, Small Footprint, DC-DC Power Converters |
| SP6122ACU | Low Voltage, Micro 8, PFET, Buck Controller Ideal for 1A to 5A, Small Footprint, DC-DC Power Converters |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP6122UEB | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP6123 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage, Synchronous Step-Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters |
| SP6123A | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage, Synchronous Step-Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters |
| SP6123ACN | 制造商:Exar Corporation 功能描述:Swithed-Mode Power Supply Controller, Voltage Mode Type, 8 Pin, Plastic, SOP |
| SP6123ACN/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage, Synchronous Step-Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters |
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