TD8202

T  echcode® DATASHEET       1MHz, High-Efficiency, Step-Up Converter for 2 to 8 White LEDs TD8202 General Description  Features    The TD8202A/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 NFET 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. The TD8202A/B/C also integrates under-voltage lockout, over-temperature protection, and current-limit circuits. The TD8202/A/B/C is available in a SOT-23-6 packages.   z Wide Input Voltage from 2.7V to 6V  z 0.25V Reference Voltage  z Fixed 1MHz Switching Frequency  z High Efficiency up to 87%  z 100Hz to 100kHz PWM Brightness Control Frequency  z Open‐LED Protection  z Under‐Voltage Lockout Protection  z Over‐Temperature Protection  z <1mA Quiescent Current Dduring Shutdown  z SOT‐23‐6 Packages  z Lead Free and Green Devices Available  z (RoHS Compliant)  Applications  z White LED Display Backlighting  z Cell Phone and Smart Phone  z PDA, PMP, MP3  z Digital Camera     December,  20,  2011                   ...