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TPS63050RMWT Fiches technique(PDF) 8 Page - Texas Instruments

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No de pièce TPS63050RMWT
Description  Single Inductor Buck-Boost With 1-A Switches and Adjustable Soft Start
Download  20 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS63050RMWT Fiches technique(HTML) 8 Page - Texas Instruments

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background image
_
+
GND
GND
VIN
VOUT
+
-
VREF
GND
GND
FB
VOUT
L2
L1
VIN
Current
Sensor
Gate
Control
Modulator
Oscillator
Device
Control
Temperature
Control
_
+
PFM/PWM
EN
GND
PG
ILIM0
ILIM1
SS
TPS63050, TPS63051
SLVSAM8C – JULY 2013 – REVISED JULY 2015
www.ti.com
8 Detailed Description
8.1 Overview
The TPS6305x devices use 4 internal N-channel MOSFETs to maintain synchronous power conversion at all
possible operating conditions. This enables the device to keep high efficiency over the complete input voltage
and output power range. To regulate the output voltage at all possible input voltage conditions, the device
automatically switches from buck operation to boost operation and back as required by the configuration. It
always uses one active switch, one rectifying switch, one switch held on, and one switch held off. Therefore, it
operates as a buck converter when the input voltage is higher than the output voltage, and as a boost converter
when the input voltage is lower than the output voltage. There is no mode of operation in which all 4 switches are
switching at the same time. Keeping one switch on and one switch off eliminates their switching losses. The
RMS current through the switches and the inductor is kept at a minimum, to minimize switching and conduction
losses. Controlling the switches this way allows the converter to always keep higher efficiency.
The device provides a seamless transition from buck to boost or from boost to buck operation.
8.2 Functional Block Diagrams
Figure 4. TPS63050 Block Diagram
8
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Product Folder Links: TPS63050 TPS63051


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