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LM3630ATME Fiches technique(PDF) 1 Page - Texas Instruments |
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LM3630ATME Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 51 page VOUT up to 40V VIN COUT CIN L D1 LED1 LED2 OVP LM3630A GND SW IN SDA SCL HWEN PWM AP INTN SEL Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design LM3630A SNVS974B – APRIL 2013 – REVISED OCTOBER 2015 LM3630A High-Efficiency Dual-String White LED Driver 1 Features 3 Description The LM3630A is a current-mode boost converter 1 • Drives up to 2 Strings of 10 Series LEDs which supplies the power and controls the current in • Wide 2.3-V to 5.5-V Input Voltage Range up to two strings of 10 LEDs per string. Programming • Up to 87% Efficient is done over an I2C-compatible interface. The maximum LED current is adjustable from 5 mA to • 8-bit I2C-Compatible Programmable Exponential 28.5 mA. At any given maximum LED current the or Linear Brightness Control LED brightness is further adjusted with 256 • PWM Brightness Control for CABC Operation exponential or linear dimming steps. Additionally, • Independent Current Control per String pulsed width modulation (PWM) brightness control can be enabled allowing for LED current adjustment • True Shutdown Isolation for LEDs by a logic level PWM signal. • Internal Soft-Start Limits Inrush Current The boost switching frequency is programmable at • Adaptive Headroom 500 kHz for low switching loss performance or 1 MHz • Programmable 16-V/24-V/32-V/40-V Overvoltage to allow the use of tiny low-profile inductors. A setting Protection for a 10% offset of these frequencies is available. • Selectable Boost Frequency of 500 kHz or 1 MHz Overvoltage protection is programmable at 16 V, with Optionally Additional Offset 24 V, 32 V, or 40 V to accommodate a wide variety of LED configurations and Schottky diode/output • Low Profile 12-Pin DSBGA Package capacitor combinations. • Solution Size 32 mm² The device operates over a 2.3-V to 5.5-V operating voltage range and –40°C to +85°C ambient 2 Applications temperature range. The LM3630A is available in an • Smart-Phone LCD Backlighting ultra-small 12-bump DSBGA package. • LCD and Keypad Lighting Device Information(1) PART NUMBER PACKAGE BODY SIZE (MAX) LM3630A DSBGA (12) 1.94 mm × 1.42 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Typical Application 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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