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TPS62184 Datasheet(PDF) 7 Page - Texas Instruments

Part # TPS62184
Description  4-V to 17-V, 6-A, 2-Phase Step-Down Converter with AEE
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS62184 Datasheet(HTML) 7 Page - Texas Instruments

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1
1
3
1
3
3
1
7
SW1
SW2
FB
VIN2
1
EN*
SS/TR
PG
gate
drive
HS1
HS2
phase shift
HS2
power
control
Power Save
Mode
HS1
gm
VREF
master
follower
PG control
Thermal
Shutdown
UVLO
control logic
delay
off-timer
VIN
tm
tf
gmout
VO
AEE
TM
VIN
VIN
60
3
VIN1
VIN1
VIN2
GND
*Pin is connected to a pull down resistor internally
(see Feature Description section)
HICCUP
EN
TPS62184
www.ti.com
SLVSCQ5A – DECEMBER 2014 – REVISED FEBRUARY 2015
8 Detailed Description
8.1 Overview
The TPS62184 is a high efficiency synchronous switched mode step-down converter based on a peak current
control topology. It is designed for smallest solution size low-profile applications, converting multi-cell Li-Ion
supply voltages to output voltages of 0.9 V to 3.5 V. While an outer voltage loop sets the regulation threshold for
the current loop based on the actual VOUT level, the inner current loop adapts the peak inductor current for every
switching cycle. The regulation network is internally compensated. The switching frequency is set by an OFF-
time control and features Power Save Mode (PSM) and Automatic Efficiency Enhancement (AEE™) to keep the
efficiency high over the whole load current and duty cycle range. The switching frequency is set depending on
VIN and VOUT and remains unchanged for steady state operating conditions.
The TPS62184 is a dual phase converter, sharing the load current among the phases. Identical in construction,
the follower control loop is connected with a fixed delay to the master control loop. Both the phases use the
same regulation threshold and cycle-by-cycle peak current setpoint. This ensures a phase-shifted as well as
current-balanced operation. Using the advantages of the dual phase topology, a 6-A continuous output current is
provided with high performance and smallest system solution size.
8.2 Functional Block Diagram
Figure 6. TPS62184
Copyright © 2014–2015, Texas Instruments Incorporated
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