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The R7731 is a high-performance, low cost, low start-up current and current mode PWM controller with burst triple mode to support green mode power saving operation. The R7731 integrates functions of soft start, Under Voltage LockOut (UVLO), Leading Edge Blanking (LEB), Over Temperature Protection (OTP) and internal slope compensation. It provides the users a superior AC/DC power application of higher efficiency, low external component counts and lower cost solution. To protect the external power MOSFET from being damaged by supply over voltage, the R7731 output driver is clamped at 12V. Furthermore, R7731 features fruitful protections like Over Load Protection (OLP) and Over Voltage Protection (OVP) to eliminate the external protection circuits and provide reliable operation. R7731 is available in SOT-23-6 and DIP-8 packages.
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<div class="spec-list"><ul class="lv1"><li>Very Low Start-up Current (<30μA) </li><li>10/14V UVLO </li><li>Soft Start Function </li><li>Current Mode Control </li><li>Jittering Switching Frequency </li><li>Internal Leading Edge Blanking </li><li>Built-in Slope Compensation </li><li>Burst Triple Mode PWM for Green-Mode </li><li>Cycle-by-Cycle Current Limit </li><li>Feedback Open Protection </li><li>Over Voltage Protection </li><li>Over Temperature Protection </li><li>Over Load Protection </li><li>Soft Driving for Reducing EMI </li><li>Driver Capability ±200mA </li><li>High Noise Immunity </li><li>Opto-Coupler Short Protection </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>Adaptor and Battery Charger </li><li>ATX Standby Power </li><li>Set-Top Box (STB) </li><li>DVD and CD(R) </li><li>TV/Monitor Standby Power </li><li>PC Peripherals </li></ul></div>
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