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LP5526TL/NOPB bảng dữ liệu(PDF) 8 Page - Texas Instruments

tên linh kiện LP5526TL/NOPB
Giải thích chi tiết về linh kiện  Lighting Management Unit With High-Voltage Boost Converter With up to 150-mA Serial Flash LED Driver
PDF  41 Pages
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nhà sản xuất  TI1 [Texas Instruments]
Trang chủ  http://www.ti.com
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LP5526TL/NOPB bảng dữ liệu(HTML) 8 Page - Texas Instruments

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VDD1,2
VDDIO
0V
0V
VDD
VDDIO
STANDBY
RESET
INTERNAL
STARTUP
SEQUENCE
NRST = L
or POR = H
EN_BOOST = H*
TSD = H
~10 ms Delay
BOOST STARTUP
NSTBY = H and
NRST = H
NSTBY = L and
NRST = H
EN_BOOST = L*
~20 ms Delay
NORMAL MODE
EN_BOOST
rising edge*
* TSD = L
VREF = 95% OK*
NSTBY = L
and NRST = H
LP5526
SNVS431D – FEBRUARY 2006 – REVISED MARCH 2013
www.ti.com
Power-Up Sequence
When powering up the device, VDD1 and VDD2 should be greater than VDDIO to prevent any damage to the device.
Magnetic Boost DC/DC Converter
The LP5526 Boost DC/DC Converter generates an 8…20V supply voltage for the LEDs from single Li-Ion battery
(3V…4.5V). The output voltage is controlled with an 8-bit register in 12 steps. The converter is a magnetic
switching PWM mode DC/DC converter with a current limit. Switching frequency is 1MHz, when timing resistor
RT is 82k
Ω. Timing resistor defines the internal oscillator frequency and thus directly affects boost frequency and
RGB timings.
8
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Copyright © 2006–2013, Texas Instruments Incorporated
Product Folder Links: LP5526



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