General Description
The APW7136A/B/C is a current-mode and fixed frequency boost converter with an integrated N-FET to drive up to 8 white LEDs in series.
The series connection allows the LED current to be identical for uniform brightness. Its low on-resistance of N-FET and feedback voltage reduce power loss and achieve high efficiency. Fast 1MHz current-mode PWM operation is available for input and output capacitors and a small inductor while minimizing ripple on the input supply. The OVP pin monitors the output voltage and stops switching if exceeds the over-voltage threshold. An internal softstart circuit eliminates the inrush current during start-up.

FEATUREs
• Wide Input Voltage from 2.7V to 6V
• 0.25V Reference Voltage
• Fixed 1MHz Switching Frequency
• High Efficiency up to 87%
• 100Hz to 100kHz PWM Brightness Control Frequency
• Open-LED Protection
• Under-Voltage Lockout Protection
• Over-Temperature Protection
• <1μA Quiescent Current Dduring Shutdown
• SOT-23-6 Packages
• Lead Free and Green Devices Available (RoHS Compliant)

APPLICATIONs
• White LED Display Backlighting
• Cell Phone and Smart Phone
• PDA, PMP, MP3
• Digital Camera