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LM3530 Datasheet(PDF) 1 Page - Texas Instruments |
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LM3530 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 50 page  SW IN OVP ILED SCL SDA GND ALS1 CIN LM3530 2.7V to 5.5V Up to 40V L D1 ALS2 HWEN VIN VIN Ambient Light Sensor Ambient Light Sensor INT PWM 10 k: VLOGIC 10 k: 10 k: 10 k: COUT Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3530 SNVS606L – JUNE 2009 – REVISED DECEMBER 2014 LM3530 High-Efficiency White-LED Driver with Programmable Ambient Light Sensing Capability and I2C-Compatible Interface 1 Features 3 Description The LM3530 current mode boost converter supplies 1 • Drives up to 11 LEDs in series the power and controls the current in up to 11 series • 1000:1 Dimming Ratio white LEDs. The 839-mA current limit and 2.7-V to • 90% Efficient 5.5-V input voltage range make the device a versatile backlight power source ideal for operation in portable • Programmable Dual Ambient Light Sensor Inputs applications. with Internal ALS Voltage Setting Resistors • I2C Programmable Logarithmic or Linear The LED current is adjustable from 0 mA to 29.5 mA via an I2C-compatible interface. The 127 different Brightness Control current steps and 8 different maximum LED current • External PWM Input for Simple Brightness levels give over 1000 programmable LED current Adjustment levels. Additionally, PWM brightness control is • True Shutdown Isolation for LEDs and Ambient possible through an external logic level input. Light Sensors The device also features two Ambient Light Sensor • Internal Soft-Start Limits Inrush Current inputs. These are designed to monitor analog output • Wide 2.7-V to 5.5-V Input Voltage Range ambient light sensors and provide programmable adjustment of the LED current with changes in • 40-V and 25-V Overvoltage Protection Options ambient light. Each ambient light sensor input has • 500-kHz Fixed Frequency Operation independently programmable internal voltage setting • 839-mA Peak Current Limit resistors which can be made high impedance to reduce power during shutdown. The 500-kHz 2 Applications switching frequency allows for high converter efficiency over a wide output voltage range • Smartphone LCD Backlighting accommodating from 2 to 11 series LEDs. Finally, the • Personal Navigation LCD Backlighting support of Content Adjusted Backlighting maximizes • 2 to 11 Series White-LED Backlit Display Power battery life while maintaining display image quality. Source The LM3530 operates over the −40°C to 85°C space temperature range. Device Information(1) PART NUMBER PACKAGE BODY SIZE (MAX) LM3530 DSBGA (12) 1.64 mm x 1.24 mm (1) For all available packages, see the orderable addendum at the end of the datasheet. Simplified Schematic 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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