Weltrend | Products

LED drivers

WT7228S

The WT7228S is a current mode control LED driver IC of constant off-time operating mode. The supply voltage range is wide from 8V to 450V with an internal voltage regulation at 7.5V. The WT7228S also has a PWM dimming control signal with a duty ratio of 0.1% - 99.9%.Besides, a linear dimming range from 0.5V to 5V is permitted to control the LED current. The WT7228S is suited for buck and boost LED drivers operated under an open-loop current-control mode. WT7228S makes a good output current regulation without the need of any loop compensation. This will effectively reduce external components.

Features

- Switch mode controller for single switch LED drivers
- Open loop current controller
- Operating voltage from 8V to 450V
- Analog and PWM dimming capabilities
- Only few external components needed for operation
- Over temperature protection function
- LED shorting protection function
- Package Type:
- SOP8 with exposed pad, Green package

- SOP16 with exposed pad, Green package

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