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參數(shù)資料
| 型號(hào)： | HWD20011EUA |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | High-Efficiency, Low-Supply-Current, Compact, Step-Up DC-DC Converters |
| 中文描述： | 高效率，低電源電流，結(jié)構(gòu)緊湊，升壓型DC - DC轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 12/13頁(yè) |
| 文件大小： | 787K |
| 代理商： | HWD20011EUA |
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H
High-Effic ienc y, Low-S upply-Current,
Compac t, S tep-Up DC-DC Converters
12
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TRANSISTOR COUNT: 751
Chip Information
Pac kage Information
Optional External Rec tifier
Although not required, a Schottky diode (such as the
MBR0520) connected between LX and OUT allows
lower start-up voltages (Figure 10) and is recommend-
ed when operating at input voltages below 1.3V. Note
that adding this diode provides no significant efficiency
improvement.
PC Board Layout and Grounding
Careful printed circuit layout is important for minimizing
ground bounce and noise. Keep the IC’s GND pin and
the ground leads of the input and output filter capaci-
tors less than 0.2in (5mm) apart. In addition, keep all
connections to the FB and LX pins as short as possi-
ble. In particular, when using external feedback resis-
tors, locate them as close to the FB as possible. To
maximize output power and efficiency and minimize
output ripple voltage, use a ground plane and solder
the IC’s GND directly to the ground plane.
HWD20011
HWD2001
HWD20012
BATT
(HWD20012)
V
IN
LBI
REF
GND
R3
R1
200
R4
R2
100k
22
μ
H
47
μ
F
0.1
μ
F
LX
LBO
FB
SHDN
OUT
LOW-BATTERY
OUTPUT
0.1
μ
F
MBR0520
47
μ
F
CLSEL
(HWD20012)
Figure 10. Adding a Schottky Diode for Low Input Voltage
Operation
1
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相關(guān)代理商/技術(shù)參數(shù) |
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| HWD20012 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:High-Efficiency, Low-Supply-Current, Compact, Step-Up DC-DC Converters |
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| HWD2001EUA | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:High-Efficiency, Low-Supply-Current, Compact, Step-Up DC-DC Converters |
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