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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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LP8553 Datenblatt(PDF) 32 Page - Texas Instruments |
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LP8553 Datenblatt(HTML) 32 Page - Texas Instruments |
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32 / 41 page  LP8553 SNVS701B – SEPTEMBER 2011 – REVISED JANUARY 2014 www.ti.com EEPROM Address 2 Address A2h EEPROM ADDRESS 2 register 7 6 5 4 3 2 1 0 ADAPTIVE_SPEED[1:0] ADV_SLOPE MODE_25/50_S EN_ADAPT EN_BOOST BOOST_IMAX I_SLOPE[1] EL Name Bit Access Description ADAPTIVE 7 R/W Boost converter adaptive control speed adjustment SPEED[1] 0 = Normal mode 1 = Adaptive mode optimized for light loads. Activating this helps the voltage droop with light loads during boost / backlight startup. ADAPTIVE 6 R/W Boost converter adaptive control speed adjustment SPEED[0] 0 = Adjust boost once for each phase shift cycle or normal PWM cycle 1 = Adjust boost every 16th phase shift cycle or normal PWM cycle ADV_SLOPE 5 R/W Advanced slope 0 = Advanced slope is disabled 1 = Use advanced slope for brightness change to make brightness changes smooth for eye MODE_25/50_SEL 4 R/W 25% or 50% mode selection for PWM & current control 0 = 50% mode selected 1 = 25% mode selected EN_ADAPT 3 R/W Enable boost converter adaptive mode 0 = adaptive mode disabled, boost converter output voltage is set with VBOOST EEPROM register bits 1 = adaptive mode enabled. Boost converter startup voltage is set with VBOOST EEPROM register bits, and after startup voltage is reached the boost converter will adapt to the highest LED string VF. LED driver output headroom is set with DRV_HEADR EEPROM control bits. EN_BOOST 2 R/W Enable boost converter 0 = boost is disabled 1 = boost is enabled and will turn on automatically when backlight is enabled BOOST_IMAX 1 R/W Boost converter inductor maximum current 0 = 1.4A 1 = 2.5A (recommended) I_SLOPE[1] 0 R/W Current slope I_SLOPE[1:0] trim bits adjust the constant current level of the PWM control range in the PWM & current control mode I_SLOPE[1:0] 25% MODE 50% MODE 00 −2.5% −1.25% 01 −5.0% −2.50% 10 −7.5% −3.75% 11 −10.0% −5.00% EEPROM Address 3 Address A3h EEPROM ADDRESS 3 register 7 6 5 4 3 2 1 0 UVLO[1:0] EN_PSPWM PWM_FREQ[4:0] Name Bit Access Description 32 Submit Documentation Feedback Copyright © 2011–2014, Texas Instruments Incorporated Product Folder Links: LP8553 |
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