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LM3630A 데이터시트(PDF) 1 Page - Texas Instruments |
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LM3630A 데이터시트(HTML) 1 Page - Texas Instruments |
1 / 45 page VOUT up to 40V VIN COUT CIN L D1 LED1 LED2 OVP LM3630A GND SW IN SDA SCL HWEN PWM AP INTN SEL LM3630A www.ti.com SNVS974 – APRIL 2013 LM3630A High-Efficiency Dual-String White LED Driver Check for Samples: LM3630A 1 FEATURES DESCRIPTION The LM3630A is a current mode boost converter 2 • Drives up to 2 strings of 10 series LEDs which supplies the power and controls the current in • Up to 87% efficient up to two strings of 10 LEDs per string. Programming • 8-bit I2C-Compatible Programmable is done over an I2C-compatible interface. The Exponential or Linear Brightness Control maximum LED current is adjustable from 5 mA to 28.5 mA. At any given maximum LED current the • PWM Brightness Control for CABC Operation LED brightness is further adjusted with 256 • Independent Current Control per String exponential or linear dimming steps. Additionally, • True Shutdown Isolation for LEDs pulsed width modulation ("PWM") brightness control can be enabled allowing for LED current adjustment • Internal Soft-Start Limits Inrush Current by a logic level PWM signal. • Wide 2.3V to 5.5V Input Voltage Range The boost switching frequency is programmable at • Adaptive Headroom 500 kHz for low switching loss performance or 1MHz • Programmable 16V/24V/32V/40V Over-Voltage 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 Over-voltage protection is programmable at 16V, 24V, 32V, or 40V to accommodate a wide variety of 1MHz with optionally additional offset LED configurations and Schottky Diode/Output • Low Profile 12-Bump DSBGA Package Capacitor combinations. • Solution Size 32mm² The device operates over the 2.3V to 5.5V operating voltage range and -40°C to +85°C ambient APPLICATIONS temperature range. The LM3630A is available in an • Smart-Phone LCD Backlighting ultra-small 12-bump DSBGA package. • LCD + Keypad Lighting TYPICAL APPLICATION CIRCUIT 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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