FAN7346: 4通道 用于照明的LED电流控制IC

The FAN7346 is an LED current-balance controller that controls 4-LED arrays to maintain equal LED current.

The FAN7346 has a high withstanding voltage, so is suitable for edge-type LED BLU and LED Lighting. To minimize components between primary to secondary, the FAN7346 generates a new integrated feedback signal.

The FAN7346 provides various protections, such as over-voltage regulation, open-LED protection, thermal protection, and drain-source voltage protection of regulating switch (the FAN7346 monitors all LED arrays drain-source voltage for protection). To increase system reliability, FAN7346 applies individual string protection. Because FAN7346 integrates so many functions it reduces overall BOM costs.

LED brightness can be linearly varied up to LED current by applying an external Pulse Width Modulated (PWM) signal to the PWM pin.

The FAN7346 is available in a 28-SOIC package.

特性

• 用于4通道LED阵列的线性平衡控制
• 宽LED灯串电压范围： £100V
• 宽VCC电压： 10.5V至35V
• 外部线性调节开关： MOSFET或BJT
• 用于反馈的内部电压调节器
• 监控外部开关的漏源极电压
• 精密电流精度调整到1.5%
• 支持外部PWM照明-正极
• 支持宽照明比： 0.5%~100%
• 自适应线性调节方法
• 产生初级控制器集成反馈信号（电流反馈+PWM照明）
• 通过初级端之间反馈实现的高效率
• 热关断（自动恢复）
• 过压调节
• 独立通道开路LED保护
• 独立通道短路LED保护
• 独立通道过流保护
• 误差标签输出
• 28引脚SOIC

Application Notes