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TPS62162 Fiches technique(PDF) 7 Page - Texas Instruments

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No de pièce TPS62162
Description  3-V to 17-V 1-A Step-Down Converter with DCS-Control
Download  34 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS62162 Fiches technique(HTML) 7 Page - Texas Instruments

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background image
control logic
Soft
start
Thermal
Shtdwn
UVLO
PG control
power
control
error
amplifier
gate
drive
HS lim
LS lim
VIN
PG
PGND
AGND
comp
comp
+
_
timer tON
DCS - Control
TM
direct control
&
compensation
comparator
ramp
SW
EN
*
VOS
FB
* This pin is connected to a pull down resistor internally
(see Detailed Description section).
Copyright ã 2016, Texas Instruments Incorporated
7
TPS62160-Q1, TPS62162-Q1
www.ti.com
SLVSCK6A – DECEMBER 2014 – REVISED NOVEMBER 2016
Product Folder Links: TPS62160-Q1 TPS62162-Q1
Submit Documentation Feedback
Copyright © 2014–2016, Texas Instruments Incorporated
9 Detailed Description
9.1 Overview
The TPS6216x-Q1 synchronous switched mode power converter is based on DCS-Control™ (Direct Control with
Seamless transition into power save mode), an advanced regulation topology, that combines the advantages of
hysteretic, voltage mode and current mode control including an AC loop directly associated to the output voltage.
This control loop takes information about output voltage changes and feeds it directly to a fast comparator stage.
It sets the switching frequency, which is constant for steady state operating conditions, and provides immediate
response to dynamic load changes. To get accurate DC load regulation, a voltage feedback loop is used. The
internally compensated regulation network achieves fast and stable operation with small external components
and low ESR capacitors.
The DCS-Control™ topology supports PWM (Pulse Width Modulation) mode for medium and heavy load
conditions and a Power Save Mode at light loads. During PWM, it operates at its nominal switching frequency in
continuous conduction mode. This frequency is typically about 2.25 MHz with a controlled frequency variation
depending on the input voltage. If the load current decreases, the converter enters Power Save Mode to sustain
high efficiency down to very light loads. In Power Save Mode the switching frequency decreases linearly with the
load current. Since DCS-Control™ supports both operation modes within one single building block, the transition
from PWM to Power Save Mode is seamless without effects on the output voltage.
9.2 Functional Block Diagram
Figure 5. TPS62160-Q1 (Adjustable Output Voltage)


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