MAX25512ATG/V+ Analog Devices

Click here to ask about the production status of specific part numbers. 2 MAX25512 I C-Controlled 4-Channel Low-Voltage 120mA LED Backlight Driver with Integrated Boost Converter General Description Benefits and Features The MAX25512 is a four-channel white LED backlight dri- Operates Down to 3V on Battery Input After Startup ver with an integrated current-mode boost converter which Wide Boost Duty Cycle to Support Low Input operates over a switching frequency range of 400kHz to Voltage 2.2MHz and incorporates spread spectrum. Phase-shifting Boost or SEPIC Current-Mode DC/DC Controller of the output channels is included as an option to further 400kHz to 2.2MHz Operating Frequency Range reduce electromagnetic interference (EMI). Spread Spectrum Available The device provides up to 120mA per channel and in- Ability to Synchronize to an External Clock cludes a control output for an external nMOS series LED Current Sinks switch. It is capable of operating down to 3V after startup. Up to 120mA Output Current per String 2 The MAX25512 has an I C interface to enable flexibility of Low OUT Regulation Voltage for Best Efficiency control and detailed diagnostics. Optional Phase-Shifting of Outputs 2 The MAX25512 is available in a compact TQFN package I C Control for Enhanced Flexibility and operates over the temperature range -40C to 16667:1 Dimming Ratio at 200Hz +125C. NTC Input For LED Current Foldback at High Temperature Hybrid Dimming Capable Applications Built-in Programmable Automatic Fading Functionality Automotive Instrument Clusters 2 Detailed Diagnostic using I C and FLTB Output Automotive Central Information Displays Automotive Head-Up Displays Shorted or Open LEDs Thermal Shutdown Output Undervoltage Compact 4x4mm TQFN Package AECQ100 Grade 1 Ordering Information appears at end of data sheet. 19-101117 Rev 0 5/212 MAX25512 I C-Controlled 4-Channel Low-Voltage 120mA LED Backlight Driver with Integrated Boost Converter Simplified Block Diagram COMP BSTMON RSDT 1.5V 0.95V SSDONE 0.35V V18 UV OV DRIVE g M DRAIN LEDUNUSED LOGIC PWM EAREF COMPARATOR LEDSHORT COMP ARRAY LEDOPEN 9 SHORTGND DAC 4 BOOSTON 4 COMPH LODIM OUT COMPL 4 CURRENT- SENSE SSDONE PGND 8 DAC IREF MAX25512 SLOPE ILIM COMP ILIMLV 20MHz BOOST CLOCK RT IMON OSC. CONTROL LOGIC IN 4 4 CCRANK LINEAR HIGH-/LOW-VOLTAGE EN VINUV REG. DETECT 4x LDUMP LEDGND THERMAL DIM V18 BANDGAP VBG SENSOR UVLO V18 UVLO CHARGE IN NGATE PUMP POR LDUMP IREF REFERENCE INTERFACE CURRENT GENERATION GND FLTB ISET TEMP SDA SCL www.maximintegrated.com Maxim Integrated 2