TPS2561ADRCT

TPS2560A 和 TPS2561A 是一款双通道配电开关，用于对电流限制精度有要求或者会遇到重电容负载和短路的应用。这些器件借助一个外部电阻器为每个通道提供一个 250mA 至 2.8A 间（典型值）的可编程电流限制阀值。对电源开关的上升和下降次数进行控制以便大大降低接通/切断期间的电流浪涌。 当输出负载超过电流限制阀值时，通过切换至恒定电流模式，TPS2560A/61A 器件的每个通道将输出电流限制到一个安全水平上。在过流和过热条件下，每个通道的 FAULTx 逻辑输出独立低电平有效。

The TPS2560A/61A is a dual-channel, current-limited power-distribution switch using N-channel MOSFETs for applications where short circuits or heavy capacitive loads will be encountered. This device allows the user to program the current-limit threshold between 250 mA and 2.8 A (typ) per channel via an external resistor. This device incorporates an internal charge pump and gate drive circuitry necessary to drive the N-channel MOSFETs. The charge pump supplies power to the driver circuit for each channel and provides the necessary voltage to pull the gate of the MOSFET above the source. The charge pump operates from input voltages as low as 2.5 V and requires little supply current. The driver controls the gate voltage of the power switch. The driver incorporates circuitry that controls the rise and fall times of the output voltage to limit large current and voltage surges and provides built-in soft-start functionality. Each channel of the TPS2560A/61A limits the output current to the programmed current-limit threshold I₀ₛ during an overcurrent or short-circuit event by reducing the charge pump voltage driving the N-channel MOSFET and operating it in the linear range of operation. The result of limiting the output current to I₀ₛ reduces the output voltage at OUTx because the N-channel MOSFET is no longer fully enhanced.

• 2 个分开的电流限制通道满足 USB 电流限制要求
• 可调电流限制，250 mA–2.8 A（典型值）
• 精确的 2.1A（最小值）/2.5A（最大值）设置（包括电阻器）
• 快速过流响应 -3.5μs（典型值）
• 2 个 44mΩ 高侧金属氧化物半导体场效应晶体管(MOSFET)
• 工作范围：2.5V 至 6.5V
• 最大待机电源电流 2μA
• 内置软启动
• 15 kV/8 kV 系统级静电放电(ESD)能力
• UL 列表 - 文件号 E169910
• 经认证的 CB&Nemko

• USB 端口/集线器
• 数字电视机顶盒
• 网络语音(VOIP)电话