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LP8733 Datasheet(PDF) 20 Page - Texas Instruments

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No. de pieza LP8733
Descripción Electrónicos  LP8733xx Dual High-Current Buck Converter and Dual Linear Regulator
PDF  86 Pages
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI - Texas Instruments

LP8733 Datasheet(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
SNVSBK2 – SEPTEMBER 2019
www.ti.com
Product Folder Links: LP8733
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Copyright © 2019, 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
The PWM mode operation with phase-adding and shedding optimizes efficiency at mid to full load at the expense
of light-load efficiency. The LP8733xx converter operates in the PWM mode at load current of about 600 mA or
higher. At lighter load current levels the device automatically switches into the 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 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:
•
The BUCK1_CTRL_1 (except the EN_RDIS1 bit)
•
The BUCK1_CTRL_2 (except the ILIM1[2:0] bits)
•
The BUCK1_VOUT
•
The BUCK1_DELAY
•
The Interrupt bits related to the slave buck (except the BUCK1_ILIM_INT)



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