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MT7282

APPLICATION
 Automotive and Marine Lighting
 High Power LED Driver
 Torch Driver
 Low Voltage LED Lighting (Landscape, Desk, Room, MR16 lighting)
 LED backlighting

FEATURES
2.5V to 40V input/output voltage range
High efficiency up to 95%
Cycle by Cycle Over Current Protection
Internal 0.2ohm power MOSFET
Support Boost ,Buck-Boost ,Buck topology
LED temperature protection
Stable with Low ESR Ceramic Capacitor
OTP and OVP protection
External setting over voltage protection
Fixed switching frequency: 450KHz
Frequency jittering for reduced EMI
Low feedback voltage: 205mV
Adjustable soft-start
Support one pin analog dimming and up to 10Khz PWM dimming
Available in ESOP8 package

DESCRIPTION
The MT7282 is a constant current white LED driver designed for wide input voltage range from 2.5V to 40V system rail. The MT7282 can be configured as Buck, Boost and Buck-Boost topology. The MT7282 drives up to 10W with AC12V/DC12V input voltage. Current mode and fixed frequency operation provides fast transient response and eases loop stabilization. With a current sense amplifier threshold of 205mV, the LED current is programmable with one external current sense resistor and the power loss is minimized. The 450KHz operating frequency minimizes external inductor, input and output capacitor.
The MT7282 supports both PWM and analog dimming by a single control pin. Fault condition protection includes over voltage protection(OVP), cycle-by-cycle peak current limiting and thermal shutdown.
The MT7282 is available in ESOP8 packages.

 

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