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参数资料
| 型号： | L6711 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 2 A SWITCHING CONTROLLER, 178 kHz SWITCHING FREQ-MAX, PQFP48 |
| 封装： | 7 X 7 MM, 1 MM HEIGHT, TQFP-48 |
| 文件页数： | 20/50页 |
| 文件大小： | 679K |
| 代理商： | L6711 |
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Obsolete
Product(s)
- Obsolete
Product(s)
L6711
Voltage positioning
27/50
The ITS circuit subtracts from the IFB current a current proportional to the sensed
considered):
where
where A and B are positive constants depending on the value of the external resistor RTC
sensing element) temperature.
The resistor RTC can be designed in order to zero the temperature influence on the output
voltage at a fixed current as follow:
obtaining the following relationship:
where RSENSE is the sensing element resistance value (at TMOS = 25C), B is the constant
obtainable from
Controller (it results KT = (TJ-25)/(TMOS-25)) and α is the Temperature Coefficient of the
sensing element. Since RTC depends from the constant B depending in turn from RTC, an
iterative process is required to properly design the RTC value. As a consequence of the
nature of the thermal sensor, a negative offset is needed to compensate the native offset
introduced by the ITS at a referenced temperature Tref and it is obtainable by connecting a
ROFFSET resistor between the OFFSET pin and SGND as follow:
To disable this function, short the pin to SGND.
Figure 12.
Integrated thermal sensor constant vs. external resistor RTC
V
OUT T,IOUT
()
VID
R
FB
R
SEN SE TMOS
()
Rg
------------------------------------------ IOUT ITC TJ
()
–
–
=
I
TC TJ
()
1
R
TC
-----------
AB
T
J
25
–
()
+
[]
=
R
FB
R
SENSE α
T
MOS
25
–
()
Rg
------------------------------------------------------------------- IOUT
R
FB
R
TC
----------- BTJ 25
–
()
+
–
0
=
R
TC
Rg
R
SENSE
---------------------
Bk
T
α I
OUT
--------------------
=
I
OFFSET
I
TC Tref
()
–
AB
T
re f
25
–
()
+
R
TC
----------------------------------------------
==
450
475
500
525
550
575
600
625
650
0
1020 30
405060 7080 90 100
1.50
1.60
1.70
1.80
1.90
2.00
0
1020 3040 50 60 7080 90 100
A [mV] vs. RTC [K]
B [mV/°C] vs. RTC [K]
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PDF描述 |
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| L6725TR | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| L6728ATR | SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO10 |
| L6728A | SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO10 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L6711_06 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3 Phase controller with dynamic VID and selectable DACs |
| L6711TR | 功能描述:DC/DC 开关控制器 3 PHASE CONTROLLER RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| L6712 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
| L6712_05 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
| L6712A | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
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