MP3387A 6-String, Max 80mA/String, Step-Up, White LED Driver with Combined Analog and PWM Dimming The Future of Analog IC Technology DESCRIPTION FEATURES The MP3387A is a step-up converter with 6- 6-String, Max 80mA/String channel current sources designed to drive white 3V to 26V Input Voltage Range LED arrays for backlighting in mid- to large- 1.5% Current Matching Accuracy between sized LCD panels. Strings Programmable Switching Frequency The MP3387A uses peak-current mode as its Selectable Combined Analog and PWM PWM control architecture. The switching Dimming Mode or Direct PWM Dimming frequency can be programmed by a resistor. Mode The MP3378M generates an output voltage up Combined Analog and PWM Dimming Mode to 45V from a 3V-to-26V input supply. The with 25% Dimming Transfer Point MP3387A regulates the current in each LED 24kHz to 27.5kHz Output Dimming string independently to the value set by an Frequency to Eliminate Audible Noise external current-setting resistor. Cascading Capability with a Single Power The MP3387A applies six internal current Source sources in each LED string terminal to achieve Programmable Over-Voltage Protection a current balance with 1.5% current regulation (OVP) accuracy between strings. Its low 500mV Recoverable Thermal Shutdown Protection regulation voltage on the LED current sources Cycle-by-Cycle Over-Current Protection reduces power loss. (OCP) The MP3387A features external digital PWM Under-Voltage Lockout (UVLO) dimming and analog dimming, both of which Available in a TQFN-24 (4mmx4mm) share a single input with a 25% PWM duty Package cycle as a transfer point. The mix-dimming strategy helps improve the dimming ratio. The APPLICATIONS MP3387A also transfers the PWM input signal Notebook PC from a 100Hz-to-20kHz frequency to 24kHz to Small LCD TV 27.5kHz automatically to eliminate audible Handheld Terminal Display noise. Automotive System and Tablet Computer Full protection features include recoverable All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under Quality over-current protection (OCP), over-voltage Assurance. MPS and The Future of Analog IC Technology are registered protection (OVP), over-temperature protection trademarks of Monolithic Power Systems, Inc. (OTP), and short and open protection of any string on the LED. The MP3387A is available in a TQFN-24 (4mmx4mm) package. MP3387A Rev. 1.0 www.MonolithicPower.com 1 5/17/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2017 MPS. All Rights Reserved. MP3387A 6-STRINGS, MAX 80MA/STRING, STEP-UP, WHITE LED DRIVER TYPICAL APPLICATION MP3387A Rev. 1.0 www.MonolithicPower.com 2 5/17/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2017 MPS. All Rights Reserved.