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參數(shù)資料
| 型號(hào)： | LT3407IDD-2 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.6 A DUAL SWITCHING CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, PLASTIC, MO-229WEED-2, DFN-10 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 221K |
| 代理商： | LT3407IDD-2 |
LTC3407-2
6
34072fa
The LTC3407-2 uses a constant frequency, current mode
architecture. The operating frequency is set at 2.25MHz
and can be synchronized to an external oscillator. Both
channels share the same clock and run in-phase. To suit
a variety of applications, the selectable Mode pin allows
the user to choose between low noise and high efficiency.
The output voltage is set by an external divider returned to
the VFB pins. An error amplfier compares the divided
output voltage with a reference voltage of 0.6V and adjusts
the peak inductor current accordingly. Overvoltage and
undervoltage comparators will pull the POR output low if
the output voltage is not within
±8.5%. The POR output
will go high after 262,144 clock cycles (about 117ms) of
achieving regulation.
OPERATIO
U
BLOCK DIAGRA
W
1
2
9
10
8
3
4
11
5
–
+
–
+
–
+
–
+
EA
UVDET
OVDET
0.6V
7
0.65V
0.55V
–
+
0.35V
UV
OV
ITH
SWITCHING
LOGIC
AND
BLANKING
CIRCUIT
S
R
Q
RS
LATCH
BURST
–
+
ICOMP
IRCMP
ANTI
SHOOT-
THRU
BURST
CLAMP
SLOPE
COMP
EN
SLEEP
POR
COUNTER
0.6V REF
OSC
REGULATOR 2 (IDENTICAL TO REGULATOR 1)
PGOOD1
PGOOD2
SHUTDOWN
VIN
6
REGULATOR 1
SW1
GND
POR
GND
SW2
5
Ω
MODE/SYNC
VFB1
RUN1
RUN2
VFB2
Main Control Loop
During normal operation, the top power switch (P-channel
MOSFET) is turned on at the beginning of a clock cycle
when the VFB voltage is below the the reference voltage.
The current into the inductor and the load increases until
the current limit is reached. The switch turns off and
energy stored in the inductor flows through the bottom
switch (N-channel MOSFET) into the load until the next
clock cycle.
The peak inductor current is controlled by the internally
compensated ITH voltage, which is the output of the error
amplifier.This amplifier compares the VFB pin to the 0.6V
reference. When the load current increases, the VFB volt-
age decreases slightly below the reference. This
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| LT3407IDD-2#TRPBF | 1.6 A DUAL SWITCHING CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PDSO10 |
| LT3407IMSE-2#TRPBF | 1.6 A DUAL SWITCHING CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PDSO10 |
| LT3407EMSE-2#TRPBF | 1.6 A DUAL SWITCHING CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PDSO10 |
| LT3407EDD-2#TR | 1.6 A DUAL SWITCHING CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PDSO10 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
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| LT341 | 制造商:SEOUL 制造商全稱:Seoul Semiconductor 功能描述:BLUE OVAL LAMP LED |
| LT3412G | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Optoelectronic |
| LT341BC | 制造商:Datak Corporation 功能描述: |
| LT341L | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Optoelectronic |
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