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TPS62410 Fiches technique(PDF) 9 Page - Texas Instruments

No de pièce TPS62410
Description  2.25-MHz 2 x 800-mA Dual Step-Down Converter in Small 3 횞 3 mm VSON Package
Download  36 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS62410 Fiches technique(HTML) 9 Page - Texas Instruments

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Internal
compensated
Error Amp.
Sawtooth
Generator
Skip Comp.Low
PWM
Comp.
Average
CurrentDetector
Skip ModeEntry
VREF
Control
Stage
GateDriver
PMOSCurrent
LimitComparator
NMOSCurrent
LimitComparator
LoadComparator
VREF-1%
FB
VOUT1
FB_VOUT
Undervoltage
Lockout
Thermal
Shutdown
Softstart
VIN
GND
MODE
Error Amp.
Sawtooth
Generator
PWM
Comp.
VREF
Control
Stage
GateDriver
PMOSCurrent
LimitComparator
NMOSCurrent
LimitComparator
LoadComparator
FB_VOUT2
Thermal
Shutdown
Softstart
VIN
GND
MODE
CLK180°
Easy Scale
Interface
CLK0°
CLK180°
2.25MHz
Oscillator
Converter1
Converter2
SW1
SW2
ADJ2
FB1
DEF1
Mode/
DATA
EN1
EN2
VIN
GND
Ext. res. network
Reference
Average
CurrentDetector
Skip ModeEntry
ACK
MOSFET
Opendrain
Internal
compensated
Skip Comp.
VREF+1%
FB_VOUT
Skip Comp.Low
VREF-1%
FB_VOUT
Skip Comp.
VREF+1%
FB_VOUT
Note A
RI1
RI..N
Int.Resistor
Network
C
ff
25pF
Register
DEF1_High
DEF1_Low
RI1
RI..N
Int.Resistor
Network
C
ff 25pF
Register
DEF2
NoteB
TPS62410
www.ti.com
SLVS737A – FEBRUARY 2007 – REVISED JULY 2015
7.2 Functional Block Diagram
A.
In fixed output voltage version, the pin DEF_1 is connected to an internal digital input and disconnected from the error
amplifier
B.
To set the output voltage of converter 2 through EasyScale™ interface, ADJ2 pin must be directly connected to VOUT2
7.3 Feature Description
7.3.1 Dynamic Voltage Positioning
This feature reduces the voltage undershoots and overshoots at load steps from light to heavy load and vice
versa. It is activated in power-save mode operation. It provides more headroom for both the voltage drop at a
load step, and the voltage increase at a load throw-off. This improves load transient behavior.
At light loads, in which the converter operate in PFM mode, the output voltage is regulated typically 1% higher
than the nominal value. In case of a load transient from light load to heavy load, the output voltage drops until it
reaches the skip comparator low threshold set to –2% below the nominal value and enters PWM mode. During a
load throw-off from heavy load to light load, the voltage overshoot is also minimized due to active regulation
turning on the N-channel switch.
Copyright © 2007–2015, Texas Instruments Incorporated
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