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ACT6358
High-Efficiency, 40V Step-Up WLED Bias Supply
FEATURES
• High-Efficiency DC/DC WLED Bias Supply • Internal 40V, 0.55Ω Power MOSFET • Up to 10 WLEDs per String • 1A Peak Current • Supports Analog and PWM LED Dimming • Integrated Over-Voltage Protection (OVP) • Programmable Soft-Start Function • Thermal Shutdown • Cycle-by-Cycle Over Current Protection • Tiny TDFN33-8 Package
APPLICATIONS
• TFT LCD Displays • Smart Phones • Portable Media Players • GPS/Personal Navigation Devices
SIMPLIFIED APPLICATION CIRCUIT
GENERAL DESCRIPTION
The ACT6358 step-up DC/DC converter drives white LEDs with an externally programmable constant current.