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參數(shù)資料
| 型號： | R1211D100A |
| 廠商： | Ricoh Co., Ltd. |
| 英文描述： | STEP-UP DC/DC CONTROLLER |
| 中文描述： | 升壓型DC / DC控制器 |
| 文件頁數(shù)： | 12/40頁 |
| 文件大?。?/td> | 385K |
| 代理商： | R1211D100A |
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R1211x
TIMING CHART
R1211x002A/R1211x002C
12
R1
R2
V
OUT
V
FB
+
-
V
REF
AMPOUT
-
+
SS
DTC
EXT
PWM Comparator
EXT
OP AMP
R1211x002B/R1211x002D
R1
R2
V
OUT
V
FB
+
-
V
REF
AMPOUT
-
+
SS
DTC
EXT
PWM Comparator
EXT
OP AMP
<Soft-start Operation>
Soft-start operation is starting from power-on as follows:
(Step1)
The voltage level of SS is rising gradually by constant current circuit of the IC and a capacitor. V
REF
level which
is input to OP AMP is also gradually rising. V
OUT
is rising up to input voltage level just after the power-on,
therefore, V
FB
voltage is rising up to the setting voltage with input voltage and the ration of R1 and R2. AMPOUT
is at "L", and switching does not start.
(Step2)
When the voltage level of SS becomes the setting voltage with the ration of R1 and R2 or more, switching
operation starts. V
REF
level gradually increases together with SS level. V
OUT
is also rising with balancing V
REF
and
V
FB
. Duty cycle depends on the lowest level among AMPOUT, SS, and DTC of the 4 input terminals in the PWM
comparator.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| R1211D101A | STEP-UP DC/DC CONTROLLER |
| R1211D101C | STEP-UP DC/DC CONTROLLER |
| R1211D102A | STEP-UP DC/DC CONTROLLER |
| R1211D102C | STEP-UP DC/DC CONTROLLER |
| R1211D103A | STEP-UP DC/DC CONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| R1211D101A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:STEP-UP DC/DC CONTROLLER |
| R1211D101C | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:STEP-UP DC/DC CONTROLLER |
| R1211D102A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:STEP-UP DC/DC CONTROLLER |
| R1211D102C | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:STEP-UP DC/DC CONTROLLER |
| R1211D103A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:STEP-UP DC/DC CONTROLLER |
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