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參數資料
| 型號： | LB03 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | SIMPLE SWITCHER 3A Step-Down Voltage Regulator |
| 中文描述： | 第3A的SIMPLE SWITCHER降壓穩壓器 |
| 文件頁數： | 1/24頁 |
| 文件大小： | 750K |
| 代理商： | LB03 |
LM2576/LM2576HV Series
SIMPLE SWITCHER
3A Step-Down Voltage Regulator
General Description
The LM2576 series of regulators are monolithic integrated
circuits that provide all the active functions for a step-down
(buck) switching regulator, capable of driving 3A load with
excellent line and load regulation. These devices are avail-
able in fixed output voltages of 3.3V, 5V, 12V, 15V, and an
adjustable output version.
Requiring a minimum number of external components, these
regulators are simple to use and include internal frequency
compensation and a fixed-frequency oscillator.
The LM2576 series offers a high-efficiency replacement for
popular three-terminal linear regulators. It substantially re-
duces the size of the heat sink, and in some cases no heat
sink is required.
A standard series of inductors optimized for use with the
LM2576 are available from several different manufacturers.
This feature greatly simplifies the design of switch-mode
power supplies.
Other features include a guaranteed
±
4% tolerance on out-
put voltage within specified input voltages and output load
conditions, and
±
10% on the oscillator frequency. External
shutdown is included, featuring 50 μA (typical) standby cur-
rent. The output switch includes cycle-by-cycle current limit-
ing, as well as thermal shutdown for full protection under
fault conditions.
Features
n
3.3V, 5V, 12V, 15V, and adjustable output versions
n
Adjustable version output voltage range,
1.23V to 37V (57V for HV version)
±
4% max over
line and load conditions
n
Guaranteed 3A output current
n
Wide input voltage range, 40V up to 60V for
HV version
n
Requires only 4 external components
n
52 kHz fixed frequency internal oscillator
n
TTL shutdown capability, low power standby mode
n
High efficiency
n
Uses readily available standard inductors
n
Thermal shutdown and current limit protection
n
P+ Product Enhancement tested
Applications
n
Simple high-efficiency step-down (buck) regulator
n
Efficient pre-regulator for linear regulators
n
On-card switching regulators
n
Positive to negative converter (Buck-Boost)
Typical Application
Versions)
(Fixed Output Voltage
SIMPLE SWITCHER
is a registered trademark of National Semiconductor Corporation.
01147601
FIGURE 1.
August 2004
L
2004 National Semiconductor Corporation
DS011476
www.national.com
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相關代理商/技術參數 |
參數描述 |
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| LB-030-09-3A20-01-N | 功能描述:LED電源 LED BALLAST 30W 3-9V 3.2A RoHS:否 制造商:Cree, Inc. 工作模式:Constant Voltage (CV) 輸出功率額定值: 輸入電壓:220 V to 240 V 輸出端數量:1 輸出電壓（通道 1）:40 V 輸出電流（通道 1）:900 mA 安裝風格:Screw 尺寸:90 mm L x 90 mm W x 37.5 mm H 商用/醫用:Commercial |
| LB-030-15-1A75-01-N | 功能描述:LED電源 LED BALLAST 30W 3-15V 1.75A RoHS:否 制造商:Cree, Inc. 工作模式:Constant Voltage (CV) 輸出功率額定值: 輸入電壓:220 V to 240 V 輸出端數量:1 輸出電壓（通道 1）:40 V 輸出電流（通道 1）:900 mA 安裝風格:Screw 尺寸:90 mm L x 90 mm W x 37.5 mm H 商用/醫用:Commercial |
| LB03-10B03 | 制造商:MORNSUN 制造商全稱:MORNSUN 功能描述:AC-DC CONVERTER |
| LB03-10B05 | 制造商:MORNSUN 制造商全稱:MORNSUN 功能描述:AC-DC CONVERTER |
| LB03-10B09 | 制造商:MORNSUN 制造商全稱:MORNSUN 功能描述:LB series ---- is a compact size power converter offered by Mornsun. |
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