TPS92510DGQ

TPS92510是一款配有集成型高侧MOSFET的60V，1.5A峰值电流模式降压转换器。它被专门设计成用一个恒定电流驱动高亮度LED。紧密度容限，200mV内部基准电压减少了电流感测电阻器中的功率耗散。一个专用的脉宽调制输入引脚可实现对光输出的线性控制。 TPS92510集成了一个温度折返特性，此特性能够减少平均输出电流来保证感测到的LED温度永远不会超过一个特定的值，从而提升了整个系统的可靠性。一个集成的频率同步特性可减少多串应用中的有害差频并简化对电磁干扰(EMI)的滤除。可调输入电压UVLO特性可适应多种电池类型的不同的深度放电水平。 TPS92510支持逐周期过流保护，和热关断保护。它采用一个10引脚MSOP PowerPAD封装。 The TPS92510 is a 60-V, 1.5-A, step-down (buck) regulator with an integrated high-side N-channel MOSFET. To improve performance during line and load transients the device implements a constant frequency, peak-current mode control which reduces output capacitance and simplifies external frequency compensation design. The wide switching frequency of 100 kHz to 2500 kHz allows for efficiency and size optimization when selecting the output filter components. The switching frequency is adjusted using a resistor to ground on the RT/CLK pin. The device has an internal phase lock loop (PLL) on the RT/CLK pin that is used to synchronize the power switch turn on to a falling edge of an external system clock. The TPS92510 has a default start up voltage of approximately 2.5V. The EN pin has an internal pull-up current source that can be used to adjust the input voltage under voltage lockout (UVLO) threshold with two external resistors. In addition, the pull up current provides a default condition. When the EN pin is floating the device operates. The operating current is 138 μA when not switching and under no load. When the device is disabled, the supply current is 1.3 μA. The integrated 200 mΩ high-side MOSFET allows for high efficiency power supply designs capable of delivering 1.5 A of continuous current to a load. The TPS92510 reduces the external component count by integrating the boot recharge diode. The bias voltage for the integrated high-side MOSFET is supplied by a capacitor on the BOOT to PH pin. The boot capacitor voltage is monitored by an UVLO circuit and turns the high-side MOSFET off when the boot voltage falls below a preset threshold. The TPS92510 can operate at high duty cycles because of the boot UVLO.

• 3.5V至60V输入电压范围
• 集成型200mΩ高侧金属氧化物半导体场效应晶体管(MOSFET)
• 200mv内部电压基准
• ±3% LED电流精度
• 100kHz至2.5MHz开关频率范围
• 专用脉宽调制(PWM)亮度调节输入
• LED温度折返
• 可调节欠压闭锁(UVLO)
• 过流保护
• 过温保护
• 微型小外形尺寸封装(MSOP)-10 (DGQ)
• PowerPAD封装

• 街道照明
• 紧急照明
• 通用照明
• 工业用和商用照明
• MR16 LED灯泡