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參數資料
| 型號： | G5104 |
| 廠商： | Global Mixed-mode Technology Inc. |
| 英文描述： | 300mA Alkaline Boost DC/DC Converters in SOT-23-5 |
| 中文描述： | 300mA的堿性采用SOT升壓直流/直流轉換器- 23 - 5 |
| 文件頁數： | 6/7頁 |
| 文件大?。?/td> | 338K |
| 代理商： | G5104 |
Ver: 1.2
Mar 01, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
6
G5104
Global Mixed-mode Technology Inc.
Diode Selection
For most G5104 applications, the high switching fre-
quency requires a high-speed rectifier Schottky diodes,
such as the VISHAY SS12 (1A, 20V) with their low
forward voltage drop and fast switching speed, are
recommended. Many different manufacturers make
equivalent parts, but make sure that the component is
rated to operate at least 0.5A. To achieve high effi-
ciency, the average current rating of the Schottky di-
odes should be greater than the peak switching cur-
rent. Choose a reverse breakdown voltage greater
than the output voltage.
Lowering Output Voltage Ripple
The G5104 supplies energy to the load in bursts by
ramping up the inductor current, then delivering that
current to the load. To use low ESR capacitors will
help minimize the output ripple voltage, but proper
selection of the inductor and the output capacitor also
plays a big role. If a larger inductance value or a
smaller capacitance value is used, the output ripple
voltage will increase because the capacitor will be
slightly overcharged each burst cycle. To reduce the
output ripple, increase the output capacitance value or
add a 10pF feed-forward capacitor in the feedback
network of the G5104 (see the circuits in the Typical
Applications section). To add this small, inexpensive
10pF capacitor will greatly reduce the output voltage
ripple.
Typical Applications
VCC
SW
SHDN
FB
GND
G5104
C2
L1
V
IN
2.7V to 4.2V
V
OUT
D1
up to 9 LEDs
PWM Dimming
RS
C1
C2
47F
L1
4.7H
V
IN
2.5V to 4.2V
5V
300mA
D1
L1: MURATA LQH3C4R7M24
D1: VISHAY SS12
Boost Converter
LED Driver
C1: MLCC 4.7F 6.3V
C2: MLCC4.7F 35V
L1: MURATA LQH3C4R7M24
D1: MOTOROLA MBR0540
D2: RB751V
RS: 60
1%
M1: FDN337N
VCC
SW
SHDN
FB
GND
G5104
C1
47F
R2
316k
R1
1M
VCC
SW
SHDN
FB
GND
G5104
C2
L1
V
IN
2.7V to 4.2V
V
OUT
D1
up to 9 LEDs
PWM Dimming
RS
C1
C2
47F
L1
4.7H
V
IN
2.5V to 4.2V
5V
300mA
D1
L1: MURATA LQH3C4R7M24
D1: VISHAY SS12
Boost Converter
LED Driver
C1: MLCC 4.7F 6.3V
C2: MLCC4.7F 35V
L1: MURATA LQH3C4R7M24
D1: MOTOROLA MBR0540
D2: RB751V
RS: 60
1%
M1: FDN337N
VCC
SW
SHDN
FB
GND
G5104
C1
47F
R2
316k
R1
1M
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相關代理商/技術參數 |
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| G510440 | 功能描述:SWITCH ROTARY SP-12 W/O STOPRING RoHS:是 類別:開關 >> 旋轉 系列:KC RoHS指令信息:435123-1 Statement of Compliance 產品目錄繪圖:Rotary Switch 特色產品:TE Connectivity Switches 3D 型號:435123-1.pdf 標準包裝:1 系列:6000 位置數:10 層數:1 每層電極數:- 每層電路:BCD 觸點額定電壓:0.125A @ 115VAC 觸動器類型:旋鈕 安裝類型:PCB，通孔 端接類型:PC 引腳 方向:垂直 擺角:36° 產品目錄頁面:2570 (CN2011-ZH PDF) 其它名稱:435123-1-ND450-1183A26201A26201-ND |
| G5104T11U | 制造商:GMT 制造商全稱:Global Mixed-mode Technology Inc 功能描述:300mA Alkaline Boost DC/DC Converters in SOT-23-5 |
| G5104T1UF | 制造商:GMT 制造商全稱:Global Mixed-mode Technology Inc 功能描述:300mA Alkaline Boost DC/DC Converters in SOT-23-5 |
| G5105 | 制造商:GMT 制造商全稱:Global Mixed-mode Technology Inc 功能描述:Low-Noise Step-up DC-DC Converter |
| G5105TBU | 制造商:GMT 制造商全稱:Global Mixed-mode Technology Inc 功能描述:Low-Noise Step-up DC-DC Converter |
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