Datasheet > LM2707

LM2707

更新时间： 2024-11-15 22:51:55

品牌	Logo	应用领域
美国国家半导体 - NSC		振荡器驱动器
页数	文件大小	规格书
19页	1035K
描述
Inductive-Boost Series LED Driver with Programmable Oscillator Frequency

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LM2707 数据手册

February 2005

LM2707

Inductive-Boost Series LED Driver with Programmable

Oscillator Frequency

General Description

Features

n Excellent LED Drive Capability:

3 LED String: 30mA

The LM2707 is a magnetic boost regulator specifically de-

signed for white LED drive applications. Tightly regulated

LED currents, exceptional LED brightness uniformity, and

4 LED String: 20 mA

6 LEDs (2 strings of 3): 15 mA

very high LED-drive power efficiency ( 80%) can all be

achieved by stacking the LEDs in series between the

LM2707 output and the low-voltage feedback pin (0.515V).

n Very High LED Drive Efficiency: 80%

n Low Feedback Voltage: 515mV

The LM2707 requires only a few small external components.

A small inductor with a low saturation current rating can

safely be used because the tightly controlled current limit

circuit prevents large inductor current spikes, even at start-

up. The output capacitor can also be small due to the tightly

controlled output over-voltage protection circuit.

n Low-Resistance NMOS Power Switch: 0.6Ω

n High-Speed PWM Brightness Control Capability

n Over-Voltage Protection (18V min, 19V typ, 20V max)

n Inrush and Inductor Current Limiting

n 2.3V - 7V Input Voltage Range

n Requires Only a Few External Components

n No External Compensation Needed

n Programmable Oscillator Frequency

n ON/OFF Pin

The LM2707 is an excellent choice for display backlighting

and other general-purpose lighting functions in battery pow-

ered applications. The 2.3V-to-7V input voltage range of the

device easily accommodates single-cell Lithium-Ion batter-

ies and battery chargers.

n Small SOT23-8 Package

The LM2707 features 18V output capability, PFM regulation,

and a high-current switching transistor (400mA peak). These

characteristics allow the part to drive a series string of 2-to-4

LEDs with forward currents between 0 and 40mA. LED

brightness can be adjusted dynamically simply by applying a

PWM signal to the enable (EN) pin. The PWM signal can be

as fast as 50kHz because the LM2707 has a fast turn-on

time.

Applications

n White LED Drive for Display Backlights

n LED Flashlights

n General Purpose LED Lighting

n Step-up DC/DC Voltage Conversion

In addition to LED-drive applications, the LM2707 can also

be used as a general purpose DC-DC voltage regulator in

boost converter applications.

The LM2707 is available in a SOT23-8 surface mount pack-

age.

Typical Application Circuit

20099225

DS200992

www.national.com

12 3 4 5 6 7...19

中文翻译

下载PDF

与LM2707相关器件

型号	品牌	获取价格	描述	数据表
LM2707MF	NSC	获取价格	Inductive-Boost Series LED Driver with Programmable Oscillator Frequency
LM2707MFX	NSC	获取价格	Inductive-Boost Series LED Driver with Programmable Oscillator Frequency
LM270Z	SEOUL	获取价格	GREEN OVAL LAMP LED
LM271	SEOUL	获取价格	INFRARED LAMP LED
LM2710	NSC	获取价格	Step-up PWM DC/DC Converter Integrated with 5 Buffers
LM2710MT-ADJ	NSC	获取价格	Step-up PWM DC/DC Converter Integrated with 5 Buffers
LM2710MTX-ADJ	NSC	获取价格	Step-up PWM DC/DC Converter Integrated with 5 Buffers
LM2711	NSC	获取价格	TFT Panel Module
LM2711MT-ADJ	NSC	获取价格	TFT Panel Module
LM2711MTX-ADJ	NSC	获取价格	TFT Panel Module

与LM2707相关文章

解析光耦仿真器：升级光耦合器技术的必要性
2024-11-18

11
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

5
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

31
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

13

产品中心

服务支持

精选活动

关于我们

帮助中心

LM2707

LM2707 数据手册

与LM2707相关器件

与LM2707相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

LM2707

LM2707 数据手册

与LM2707相关器件

与LM2707相关文章

您还可以找

您在本页遇到什么问题？