MT7282

MT7282 is a white LED constant-current driver IC with a 2.5V~40V wide input range, configurable as buck, boost, or buck-boost topology. It delivers up to 10W driving capability at AC12V/DC12V input voltage. Operating at a fixed frequency in current mode to regulate LED current, the device offers fast transient response, stable loop performance, and straightforward design. High-side current sensing technology enables average LED operating current to be set via an external resistor. The 200mV low reference voltage effectively reduces power dissipation and improves efficiency. The 450kHz fixed operating frequency minimizes external inductance, input and output capacitance. Both PWM dimming and analog dimming are supported through a single control pin. Integrated protection features include OVP, OCP, and OTP to ensure safe and reliable system operation.

Applications

• Automotive daytime running lights and marine lighting
• High-power LED lighting drivers
• LED flashlights
• Low-voltage LED lighting (landscape lighting, desk lamps and indoor lighting, MR16 spotlights)
• LED backlighting

Key features

• Input voltage range: 2.5V~40V
• Up to 95% efficiency
• Cycle-by-cycle overcurrent protection
• Built-in 0.2Ω power MOSFET
• Supports boost, buck-boost, and buck topologies
• LED over-temperature protection
• Low ESR ceramic capacitors ensure system stability
• Over-temperature protection and overvoltage protection
• Externally adjustable overvoltage protection
• Fixed 450kHz operating frequency
• Patented frequency dithering technology reduces EMI
• Low feedback voltage: 200mV
• Adjustable soft-start mechanism
• Supports analog dimming and PWM dimming up to 10kHz
• ESOP8 package