MP24881中文资料60V, 1.1A, Synchronous Step-Down LED Driver with PWM and Analog Dimming Function数据手册MPS规格书

描述 Description

The MP24881 is a 60V, monolithic, synchronous step-down LED driver with an integrated N-channel MOSFET and rectifier. It delivers up to 1.1A of continuous LED current (ILED) to high-power LEDs. The wide 10V to 60V input voltage (VIN) range accommodates a variety of step-down lighting applications. Hysteretic current mode minimizes the loop compensation design and achieves fast transient response, which makes the 25kHz pulse-width modulation (PWM) dimming frequency possible.

The MP24881 supports analog dimming with a PWM or analog signal input, which helps remove the flicker caused by the PWM frequency (fPWM). The separated PWM and analog dimming input port enables all PWM signal-controlled hybrid dimming. The hybrid dimming depth can reach as low as 0.1%.

Full protections include current-sense (CS) short protection, low-side (LS) reverse over-current protection (OCP), high-side (HS) OCP, and thermal shutdown.

The MP24881 is available in an SOIC-8EP package.

特性 Features

• Wide 10V to 60V Operating Input Voltage (VIN) Range
• Up to 1.1A of LED Current (ILED)
• Synchronous Step-Down Converter
• Internal 100mΩ High-Side MOSFET (HS-FET)
• Internal 110mΩ Synchronous Rectifier (SR)
• Hysteretic Control
• Up to 2MHz Switching Frequency (fSW)
• 100mV Reference Voltage (VREF)
• LED Common Cathode Connection
• Excellent Pulse-Width Modulation (PWM) Dimming Performance:
• Up to 25kHz PWM Dimming Frequency
• 20000:1 Wide Dimming Range

• Down to 0.1% Dimming Depth
• All PWM Signal-Controlled Hybrid Dimming
• High-Side (HS) Over-Current Protection (OCP)
• Current-Sense (CS) Short Protection
• Low-Side (LS) Reverse OCP
• Thermal Shutdown
• Available in an SOIC-8EP Package