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LP8733 Arkusz danych(PDF) 20 Page - Texas Instruments

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Numer części LP8733
Szczegółowy opis  LP8733xx-Q1 Dual High-Current Buck Converter and Dual Linear Regulator
PDF  85 Pages
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Producent  TI [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI - Texas Instruments

LP8733 Arkusz danych(HTML) 20 Page - Texas Instruments

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IL_TOT_2PH
IL0
IL1
0
90
180
270
360
450
540
630
720
PWM0
0
90
180
270
360
450
540
630
720
PWM1
SWITCHING CYCLE 360º
PHASE, DEGREES
20
LP8733-Q1
SNVSB64 – SEPTEMBER 2018
www.ti.com
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Copyright © 2018, Texas Instruments Incorporated
Feature Description (continued)
(2)
Graph is not in scale and is for illustrative purposes only.
Figure 10. PWM Timings and Inductor Current Waveforms in 2-phase Configuration. (UPDATE) (2)
7.3.1.3 Transition Between PWM and PFM Modes
PWM mode operation with phase-adding/shedding optimizes efficiency at mid to full load at the expense of light-
load efficiency. The LP8733xx-Q1 converter operates in PWM mode at load current of about 600 mA or higher.
At lighter load current levels the device automatically switches into PFM mode for reduced current consumption
when forced PWM mode is disabled (AUTO mode operation). By combining the PFM and the PWM modes a
high efficiency is achieved over a wide output-load current range.
7.3.1.4 Dual-Phase Switcher Configurations
The LP8733xx-Q1 device supports the following regulator configurations:
•
Single dual-phase configuration, Buck0 is master (buck0 and buck1)
•
Two single-phase configuration (buck0 and buck1)
In the dual-phase configuration the control of the dual-phase regulator settings is done using the control registers
of the master buck. The following slave registers are ignored:
•
BUCK1_CTRL_1, except EN_RDIS1 bit
•
BUCK1_CTRL_2, except ILIM1[2:0] bits
•
BUCK1_VOUT
•
BUCK1_DELAY
•
interrupt bits related to the slave buck, except BUCK1_ILIM_INT



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