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MAXREFDES1003: 150mA, 4-Channel LED Driver in SEPIC Configuration

MAXREFDES1003

参考设计免责声明 参照  重要声明和免责声明  涵盖参考设计和其他Maxim资源

描述

The MAX16813 is a highly efficient, high-brightness (HB) LED driver that provides four integrated LED current-sink channels. An integrated current-mode switching controller drives a DC-DC converter that provides the necessary voltage to multiple strings of HB LEDs. The device accepts a wide 4.75V to 40V input voltage range and withstands direct automotive load-dump events. The wide input range allows powering HB LEDs for small- to medium-sized LCD displays in automotive and general lighting applications. 

An internal current-mode switching DC-DC controller supports boost or single-ended primary inductor converter (SEPIC) topologies and operates in an adjustable frequency range between 200kHz and 2MHz. An integrated spread-spectrum mode helps reduce EMI. Current-mode control with programmable slope compensation provides fast response and simplifies loop compensation. An adaptive output-voltage control scheme minimizes power dissipation in the LED current-sink paths. The device has a separate p-channel drive (PGATE) pin that is used for output undervoltage protection. Whenever the output falls below the threshold, the external p-MOSFET is latched off, disconnecting the input source. Cycling the EN or the input supply is required to restart the converter. 

The device consists of four identical linear current-sink channels, adjustable from 20mA to 150mA with an accuracy of ±3% using a single external resistor. Multiple channels can be connected in parallel to achieve higher current per LED string. The device also features a unique pulsed dimming control through a logic input (DIM), with minimum pulse width as low as 500ns. Protection features include output overvoltage, open-LED detection and protection, programmable shorted LED detection and protection, output undervoltage protection and detection, and overtemperature protection.

An LED driver in a SEPIC configuration using the MAX16813 is demonstrated for a 24V, 600mA output application. The device can drive up to 4 channels at once. 

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设计, 制作, 测试

图中的电路板已经完成封装和测试。不可售。

 

示意图

PCB布局

物料清单(BOM)

参数化

输入类型 Vin(Min) Vin(Max) Iout(Max) 单路/多路输出 Vout(V) Pout(W) 隔离/非隔离 拓扑
DC 8 32 0.6 - 19 14 Non-Isolated Sepic

参数化

输入类型 DC
Vin(Min) 8
Vin(Max) 32
Iout(Max) 0.6
单路/多路输出 -
Vout(V) 19
Pout(W) 14
隔离/非隔离 Non-Isolated
拓扑 Sepic

Maxim设备 (1)

器件号 名称 产品线 购买 设计套件和评估模块
MAX16813 集成4通道高亮度LED驱动器,内置高压DC-DC控制器和电池断路开关 LED驱动器 立即购买 Design Kits

Maxim设备 (1)

器件号 产品线
LED驱动器
集成4通道高亮度LED驱动器,内置高压DC-DC控制器和电池断路开关

设计资料 (3)

标题 类型 尺寸 日期
maxrefdes1003-pcb PDF 2MB 2019-07-09
maxrefdes1003-schematics PDF 31KB 2019-07-09
MAXREFDES1003_MAX16813_BOM PDF 351KB 2019-07-09
日期 类型
2019-07-09

maxrefdes1003-pcb

(PDF, 2MB)

2019-07-09

maxrefdes1003-schematics

(PDF, 31KB)

2019-07-09

MAXREFDES1003_MAX16813_BOM

(PDF, 351KB)

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