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參數(shù)資料
| 型號(hào)： | SM6702-24HA |
| 廠商： | Seiko NPC Corporation |
| 英文描述： | Mounting Bezel; For Use With:XB2B 22mm Pushbutton Switches; External Height:1.57"; External Width:1.46" |
| 中文描述： | PFM步升直流/直流轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 5/10頁(yè) |
| 文件大?。?/td> | 116K |
| 代理商： | SM6702-24HA |
SM6702 series
NIPPON PRECISION CIRCUITS—5
FUNCTIONAL DESCRIPTION
Step-up Principle
The SM6702 series use a transistor to switch the input supply in a non-isolated chopper switching regulator
configuration. The figure below shows the basic step-up switching regulator circuit.
If the transistor is ON for an interval t
the interval t
ON
generates a voltage V
that the peak voltage reaches V
the output.
ON
L
across the coil. This voltage is superimposed on the input voltage such
+ V
L
which forces the diode D to conduct and release the stored energy into
and then instantly turned OFF, the energy stored in the coil L during
IN
During normal operation, the above switching occurs repeatedly at a frequency controlled by an oscillator
(which can change depending on the input and output load conditions), generating a square wave output which
is then smoothed by the output capacitor C. Thus the output voltage (V
OUT
> V
IN
) has been stepped up.
PFM Control
In SM6702 series, the LX transistor ON interval is fixed, and the OFF interval varies in response to the input
voltage and load changes. Thus the resulting switching cycle frequency varies, called pulse frequency modula-
tion.
L
V
IN
V
OUT
D
Tr
GND
C
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SM6702-27HA | PFM Step-up DC/DC Converter |
| SM6702-27HB | Switches; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No |
| SM6702-30HA | PFM Step-up DC/DC Converter |
| SM6702-30HB | PFM Step-up DC/DC Converter |
| SM6702-33HB | PFM Step-up DC/DC Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SM6702-27HA | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:PFM Step-up DC/DC Converter |
| SM6702-27HB | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:PFM Step-up DC/DC Converter |
| SM6702-30HA | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:PFM Step-up DC/DC Converter |
| SM6702-30HB | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:PFM Step-up DC/DC Converter |
| SM6702-33HB | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:PFM Step-up DC/DC Converter |
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