A8516ELBTR-T

• Product Introduction

The A8516 is a multi-output WLED/RGB driver for backlit LCD displays and TVs. It combines a boost controller to drive an external MOSFET and six internal current draws. The boost converter operates in constant frequency (programmable) current mode.

The LED pour current can be set via an external R_ISET resistor (see chart below). Multiple LED sink currents can be combined to achieve higher currents per LED string.

The A8516 can be operated from a single supply with a voltage range of 8 to 24 V. It provides overvoltage, open LED string, short circuit, and overheating protection. The two-stage wave-by-wave current limiting feature provides soft-start and overload protection.

The device is available in a 24-pin SOICW package (LB) with built-in coagulation pins for enhanced heat dissipation and a 24-pin TSSOP package with an external thermal pad for enhanced heat dissipation. All packages are lead-free and feature 100% matte tin-plated pin frames.

• 集成 6 个电流汲入装置
• 带有集成门极驱动器的恒频电流模式控制
• 300 kHz to 1 MHz 可调升压开关频率
• 使用启用、PWM 信号或电池电压斜升等选项控制启动
• LED 串之间的电流自主均流共享可实现±0.6% 的精确度与匹配率
• 在 PWM 光暗控制过程中没有可闻的陶瓷电容器噪音
• 可调整过压保护 (OVP)
• 开路或短路 LED 串保护
• 过温、逐波限流及欠压保护
• SOIC 24 引脚封装便于单层 PCB 生产，而带有外置散热垫的 TSSOP 24 引脚封装则能提高散热性能。