- 您现在的位置：买卖IC网 > PDF目录20400 > DC1663A (Linear Technology)DEMO BOARD LTM4628 PDF资料下载
参数资料
| 型号： | DC1663A |
| 厂商： | Linear Technology |
| 文件页数： | 19/36页 |
| 文件大小： | 0K |
| 描述： | DEMO BOARD LTM4628 |
| 软件下载： | LTM4628 Spice Model |
| 设计资源： | LTM4628 Gerber Files DC1663A Design Files |
| 标准包装： | 1 |
| 系列： | µModule® |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 2，非隔离 |
| 输出电压： | 1.2V，1.5V |
| 电流 - 输出： | 8A，8A |
| 输入电压： | 4.5 ~ 26.5 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 400kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | LTM4628 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页当前第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页
LTM4628
APPLICATIONS INFORMATION
K D =
V D = T(KELVIN) ? K D ? ln D
temperature relationship that makes diodes suitable
temperature sensors. The I S term in the equation above
is the extrapolated current through a diode junction when
the diode has zero volts across the terminals. The I S term
varies from process to process, varies with temperature,
and by definition must always be less than I D . Combining
all of the constants into one term:
η ?k
q
where K D = 8.62 ?5 , and knowing ln(I D /I S ) is always posi-
tive because I D is always greater than I S , leaves us with
the equation that:
I
I S
whereV D appearstoincreasewithtemperature.Itiscom-
mon knowledge that a silicon diode biased with a current
source has an approximate –2mV/°C temperature rela-
tionship (Figure 8), which is at odds with the equation. In
fact, the I S term increases with temperature, reducing the
ln(I D /I S ) absolute value yielding an approximate –2mV/°C
composite diode voltage slope.
It is important that the bias current source be accurate and
powered from a high impedance source. This is because
the forward voltage drop is also a function of the current
through the diode.
The below equations show that when currents are a de-
cade apart the V D difference is 60mV; therefore the 10μA
current source error will affect the diode forward voltage
at temperature.
kT/q = 26mV
V D1 – V D2 = kT/q ln(I D1 )/(I D2 )
where V D1 – V D2 is the difference in the diode forward
voltage with the I D1 and I D2 current difference.
Several 1N4148 diodes were tested with 100μA of current
and Figure 9 shows the results. The 100μA current source
provided the best repeatability for each diode.
The tested diodes are very close to –2.2mV/°C to –2.4mV/°C
slope while each are biased with 100μA through a 120k
pull-up resistor to 12V. The Figure 9 graph can be used
to calibrate and measure LTM4628 internal temperature
by measuring the diode V D value.
1.4
1.2
1.0
0.8
0.6
0.4
0.2
I D = 10μA
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
–273
–173
–73
27 127
227
0
–100
–50
0
50 100
150
200
TEMPERATURE (°C)
4628 F08
TEMPERATURE (°C)
4628 F09
Figure 8. Silicon Diode Voltage V D vs Temperature
Figure 9. The 1N4148 Diode Voltage V D vs Temperature
4628fe
For more information www.linear.com/LTM4628
19
相关PDF资料 |
PDF描述 |
|---|---|
| IFSC1008ABER220M01 | INDUCTOR POWER 22UH 0.5A SMD |
| GSC10DRYI | CONN EDGECARD 20POS DIP .100 SLD |
| AT24C08B-TH-T | IC EEPROM 8KBIT 1MHZ 8TSSOP |
| T95Z226K016LSAL | CAP TANT 22UF 16V 10% 2910 |
| 346-080-540-202 | CARDEDGE 80POS DUAL .125 GREEN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DC1666A | 功能描述:BOARD DEMO LED DRIVER LT3791 RoHS:否 类别:编程器，开发系统 >> 评估板 - LED 驱动器 系列:- 标准包装:1 系列:PowerWise® 电流 - 输出 / 通道:20mA 输出及类型:1，非隔离 输出电压:17V 特点:可调光 输入电压:2.7 ~ 5.5 V 已供物品:板 已用 IC / 零件:LM3508 相关产品:LM3508TLX-ND - IC LED DRVR WHT BCKLGT 9USMDLM3508TLDKR-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLCT-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLTR-ND - IC LED DRVR WHT BCKLGT 9MICROSMD |
| DC1667 | 制造商:INTRONICS 制造商全称:INTRONICS 功能描述:15 Watt Triple Output DC-DC Converters |
| DC1668 | 制造商:INTRONICS 制造商全称:INTRONICS 功能描述:15 Watt Triple Output DC-DC Converters |
| DC1669 | 制造商:INTRONICS 制造商全称:INTRONICS 功能描述:15 Watt Triple Output DC-DC Converters |
| DC1669A | 功能描述:BOARD EVAL LTM4627 RoHS:否 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:LTM®, uModule® 标准包装:1 系列:- 主要目的:DC/DC，步降 输出及类型:1，非隔离 功率 - 输出:- 输出电压:3.3V 电流 - 输出:3A 输入电压:4.5 V ~ 28 V 稳压器拓扑结构:降压 频率 - 开关:250kHz 板类型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名称:497-12113STEVAL-ISA094V1-ND |
发布紧急采购，3分钟左右您将得到回复。