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LM3537 bảng dữ liệu(PDF) 2 Page - Texas Instruments |
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LM3537 bảng dữ liệu(HTML) 2 Page - Texas Instruments |
2 / 33 page 5 4 3 2 1 A B C D E F LDO1 LDO2 VOUT VIN_A ALS C2- D7/ INT D6 LDO3 GND SDA D8 C1- D5 PWM D1 D4 HWEN SCL D3 D2 PGND LDO4 C2+ C1+ SBIAS GPO1 GPO2 VIN_B VIN_C LM3537 SNVS634B – JUNE 2011 – REVISED MAY 2013 www.ti.com DESCRIPTION (CONTINUED) I2C-compatible control allows full configurability of the backlighting function. The LM3537 provides multi-zone Ambient Light Sensing allowing autonomous backlight intensity control in the event of changing ambient light conditions. A PWM input is also provided to give the user a means to adjust the backlight intensity dynamically based upon the content of the display. Four integrated LDOs are fully configurable through I2C capable of addressing point-of-load regulation needs for functions such as integrated camera modules. The LDOs can be powered from main battery source, or by a fixed output voltage of an external buck converter (post regulation) leading to higher conversion efficiency. The LM3537 provides excellent efficiency without the use of an inductor by operating the charge pump in a gain of 3/2 or in Pass Mode. The proper gain for maintaining current regulation is chosen, based on LED forward voltage, so that efficiency is maximized over the input voltage range. LM3537 is offered in a tiny 30-bump DSBGA package. Connection Diagram Figure 1. 30–Bump DSBGA Package Top View 2 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated Product Folder Links: LM3537 |
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Mô tả tương tự - LM3537 |
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