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參數資料
| 型號： | LM3405 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 550kHz/1.6MHz 1A Constant Current Buck Regulator for Powering LEDs |
| 中文描述： | 550kHz/1.6MHz 1A條恒流降壓穩壓器，可驅動發光二極管 |
| 文件頁數： | 1/2頁 |
| 文件大小： | 455K |
| 代理商： | LM3405 |
LM3405
550kHz/1.6MHz 1A Constant Current Buck Regulator for
Powering LEDs
General Description
Integrated with a 1A power switch, the LM3405 is a current
mode control switching buck regulator designed to provide a
simple, high efficiency solution for driving LEDs. With a 0.2V
reference voltage feedback control to minimize power dissi-
pation, an external resistor sets the current as needed for
driving various types of LEDs. Switching frequency is inter-
nally set to 550kHz (LM3405-Y) or 1.6MHz (LM3405-X),
allowing small surface mount inductors and capacitors to be
used. The LM3405 utilizes current mode control and internal
compensation offering ease of use and predictable, high
performance regulation over a wide range of operating con-
ditions. Additional features include user accessible enable/
dim pin for enabling and PWM dimming of LEDs, thermal
shutdown, current limit and over voltage protection.
Features
n
Thin SOT23-6 package
n
4.0V to 20V input voltage range
n
550kHz (LM3405Y) and 1.6MHz (LM3405X)
switching frequencies
n
300m
NMOS switch
n
30nA shutdown current
n
Enable/DIM input for enabling and PWM dimming of
LEDs
n
Requires only low value, ceramic capacitors
n
Input voltage UVLO
n
Internally compensated current mode control
n
Thermal shutdown
Applications
n
LED Driver
n
Constant Current Source
Typical Application Circuit
20178901
Connection Diagrams
20178905
6-Lead TSOT
NS Package Number MK06A
20178960
Pin 1 Indentification
ADVANCE INFORMATION
October 2006
L
2006 National Semiconductor Corporation
DS201789
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM340-5 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| LM340-5.0MDA | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:3-Terminal Positive Regulators |
| LM3405_07 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.6MHz, 1A Constant Current Buck Regulator for Powering LEDs |
| LM3405_08 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Powering and Dimming High-Brightness LEDs with the LM3405 Constant-Current Buck Regulator |
| LM3405A | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.6MHz, 1A Constant Current Buck LED Driver with Internal Compensation in Tiny SOT23 Package |
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