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參數(shù)資料
| 型號： | AIC1638-27CX |
| 廠商： | Analog Integrations Corporation |
| 英文描述： | 3-PIN ONE-CELL STEP-UP DC/DC CONVERTER |
| 中文描述： | 3引腳單細(xì)胞升壓型DC / DC變換器 |
| 文件頁數(shù)： | 12/15頁 |
| 文件大小： | 240K |
| 代理商： | AIC1638-27CX |
AIC1638
3-PIN ONE-CELL STEP-UP DC/DC CONVERTER
SPEC NO: DS-1638-00 03/01/00
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510
12
turn-on time. Switching frequency depends on load,
input voltage, and inductor value, and it can range up
to 100KHz. The SW on-resistance is typically 1 to 1.5
to minimize switch losses.
When the output voltage drops, the error comparator
enables 100KHz oscillator that turns on the MOSFET
around 7.5us and 2.5
μ
s off time. Turning on the
MOSFET allows inductor current to ramp up, storing
energy in a magnetic field. When MOSFET turns off
that force inductor current through diode to the output
capacitor and load. As the stored energy is depleted,
the current ramp down until the diode turns off. At this
point, inductor may ring due to residual energy and
stray capacitance. The output capacitor stores charge
when current flowing through the diode is high, and
release it when current is low, thereby maintaining a
steady voltage across the load.
As the load increases, the output capacitor discharges
faster and the error comparator initiates cycles sooner,
increasing the switching frequency. The maximum
duty cycle ensure adequate time for energy transfer to
output during the second half each cycle. Depending
on circuit, PFM controller can operate in either
discontinuous mode or continuous conduction mode.
Continuous conduction mode means that the inductor
current does not ramp to zero during each cycle.
+
VIN
SW
V
OUT
EXT
I
D
I
OUT
Isw
Ico
I
IN
I
PK
I
IN
V
EXT
I
SW
I
OUT
T
DIS
Charge Co.
V
SW
Discharge Co.
I
D
t
Discontinuous Conduction Mode
I
PK
I
IN
V
EXT
I
SW
I
OUT
V
SW
I
D
t
I
V
Continuous Conduction Mode
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相關(guān)代理商/技術(shù)參數(shù) |
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| AIC1638-27CZ | 制造商:AIC 制造商全稱:Analog Intergrations Corporation 功能描述:3-PIN ONE-CELL STEP-UP DC/DC CONVERTER |
| AIC1638-30CX | 制造商:AIC 制造商全稱:Analog Intergrations Corporation 功能描述:3-PIN ONE-CELL STEP-UP DC/DC CONVERTER |
| AIC1638-30CZ | 制造商:AIC 制造商全稱:Analog Intergrations Corporation 功能描述:3-PIN ONE-CELL STEP-UP DC/DC CONVERTER |
| AIC1638-33CX | 制造商:AIC 制造商全稱:Analog Intergrations Corporation 功能描述:3-PIN ONE-CELL STEP-UP DC/DC CONVERTER |
| AIC1638-33CZ | 制造商:AIC 制造商全稱:Analog Intergrations Corporation 功能描述:3-PIN ONE-CELL STEP-UP DC/DC CONVERTER |
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