LTC3783

所属类别：LED驱动
产品名称：PWM LED 驱动器及升压、反激和 SEPIC 型控制器
厂商：LT
生产批号：11+
封装：DFN-16, TSSOP-16
库存状态：有库存
库存量：20000
最低订购量：1
详细资料：

Product Introduction

LTC3783PWM LED drivers and boost, flyback, and SEPIC type controllers

peculiarity

True Color PWM^TM 提供了恒定的彩色和 3000:1 的调光比
用于实现高功率 LED 的 PWM 调光控制的全集成化负载 FET 驱动器
从模拟输入进行 100:1 的调光
宽 FB 电压范围：0V 至 1.23V
恒定电流或恒定电压调节
低停机电流：I_Q = 20µA
精度为 1% 的 1.23V 内部电压基准
具有 100mV 迟滞的 2% RUN 引脚门限
可利用一个外部电阻器来设置工作频率 (范围为 20kHz 至 1MHz)
可与一个频率高达 1.3f_OSC 的外部时钟同步
内部 7V 低压差稳压器
可编程输出过压保护
可编程软起动
可在一种无检测电阻 (No R_SENSE^TM) 模式中使用 (V_DS
16 引脚 DFN 和 TSSOP 封装

description

The LTC®3783 is a current-mode LED driver and boost, flyback, and SEPIC-type controller used to drive an N-channel power MOSFET and an N-channel load PWM switch. When an external load switch is employed, the PWMIN input not only drives PWMOUT, but also enables the controller GATE switch and error amplifier operation, allowing the controller to store load current information when PWMIN is low. This feature (patent pending) enables extremely fast, true PWM load switching operation without transient overvoltage or undervoltage issues; The 3000:1 LED dimming ratio can be achieved digitally, avoiding the color shift phenomenon common with LED current dimming. The FBP pin provides simulated dimming of the load current, resulting in an effective dimming ratio of 100:1 compared to PWM alone.

In applications where the output load current must return to the VIN, an optional constant current/constant voltage regulation is used to control the output (or input) current or output voltage and provide a limit value for another parameter. ILIM offers a 10:1 analog dimming ratio.

For low- to medium-power applications, the no-sense resistor mode takes advantage of the on-resistance of the power MOSFET and eliminates the need for a current-sense resistor to maximize efficiency.

The IC can be set to a frequency range of 20kHz to 1MHz via an external resistor and can be synchronized with an external clock using the SYNC pin.

LTC3783 is available in 16-pin DFN and TSSOP packages.

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高电压 LED 数组
电信电源
42V 汽车系统
24V 工业控制
IP 电话电源

LTC3783-related ICs include:

Model	Manufacturers	lot number	encapsulation	illustrate
LTC3783	LT	11+	DFN-16, TSSOP-16	PWM LED drivers and boost, flyback, and SEPIC type controllers
HFA37831N	INTERSIL	01+	QFP	New original stock available
2SK3783	NEC	05+	N／A	N／A
M63783	Mitsubishi	N/A	SMD	New original stock available
MC13783VK	FREESCALE	07+	BGA	Original
LT3783EFE	LINEAR	04+	SSOP	Brand new original
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