MPQ24833-B Industrial/Automotive-Grade 55V, 3A, LED Driver, AEC-Q100 Qualified DESCRIPTION FEATURES The MPQ24833-B is a 55V, 3A, LED driver 3A Maximum Output Current suitable for step-down, inverting step-up/step- Unique Step-Up/Step-Down Operation down, and step-up applications. The (Buck-Boost Mode) MPQ24833-B achieves 3A of output current Wide 4.5V to 55V Operating Input Range for with excellent load and line regulation over a Step-Down Applications (Buck Mode) wide input supply range. 0.15 Internal Power MOSFET Switch Fixed 420kHz Switching Frequency Current mode operation provides a fast Analog and PWM Dimming transient response and eases loop stabilization. 0.2V Reference Voltage Full protection features include thermal shutdown, cyclebycycle peak current limiting, open-string 6A Shutdown Mode protection, and output short-circuit protection No Minimum Number of LEDs Required (SCP). Stable with Low-ESR Output Ceramic Capacitors The MPQ24833-B incorporates both DC and Cycle-by-Cycle Over-Current Protection PWM dimming into a single control pin. The (OCP) separate input reference ground pin allows for Thermal Shutdown Protection direct enable and/or dimming control for a Open-String Protection positive-to-negative power conversion. Output Short-Circuit Protection (SCP) The MPQ24833-B requires a minimal number Available in an SOIC-8 EP Package of readily available, standard external Available in AEC-Q100 Grade 1 components, and is available in an SOIC-8 EP package. APPLICATIONS General LED Illumination LCD Backlight Panels Automotive Lighting Portable Multimedia Players Portable GPS Devices All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status, visit the MPS website under Quality Assurance. MPS, the MPS logo, and Simple, Easy Solutions are registered trademarks of Monolithic Power Systems, Inc. or its subsidiaries. MPQ24833-B Rev. 1.0 www.MonolithicPower.com 1 9/11/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2019 MPS. All Rights Reserved. MPQ24833-B 55V, 3A, MULTIPLE TOPOLOGY LED DRIVER TYPICAL APPLICATION Efficiency vs. V IN Buck Mode V = 6.2V LED 94 9.0 ILED=3A C VIN BST ILED=2A BST 91 7.5 VDD ILED=1A L CIN ILED=0.5A SW 88 6.0 C D O MPQ24833-B GND 85 4.5 OVP EN/DIM PWM or DC 82 3.0 Input FB 79 1.5 INGND VSS 76 0.0 9 12 15 18 21 24 27 30 GND INPUT VOLTAGE (V) Efficiency vs. V IN Buck-Boost Mode VLED = 21V 95 12.0 C VIN BST 90 10.0 BST VDD L CIN SW 85 8.0 C O D MPQ24833-B 80 6.0 VSS GND VSS ILED=1A OVP EN/DIM 75 4.0 ILED=0.75A PWM or DC Input ILED=0.5A 70 2.0 INGND FB VSS 65 0.0 9 12 15 18 21 24 27 30 VSS INPUT VOLTAGE (V) MPQ24833-B Rev. 1.0 www.MonolithicPower.com 2 9/11/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2019 MPS. All Rights Reserved. EFFICIENCY (%) EFFICIENCY (%) POWER LOSS (W) POWER LOSS (W)