Datasheet

DETAILED DESCRIPTION
COMP
FB
GM Amplifier
Vref
SW SW
GateDriverof
Power
Transistor
IN
SS
PWM
Generator
Currentlimit
and
SoftStart
ToffGenerator
Ton
PGND
BiasVref = 1
.
24V
UVLO
ThermalShutdown
AGND
EN
MODE
V
IN
V
S
TPS61086
www.ti.com ................................................................................................................................................................................................ SLVSA05 – AUGUST 2009
Figure 17. Block Diagram
The boost converter is designed for output voltages up to 18.5 V with a switch peak current limit of 2.0 A
minimum. The device, which operates in a current mode scheme with quasi-constant frequency, is externally
compensated for maximum flexibility and stability. The switching frequency is fixed to 1.2 MHz and the minimum
input voltage is 2.3 V. To limit the inrush current at start-up a soft-start pin is available.
TPS61086 boost converter ’ s novel topology using adaptive off-time provides superior load and line transient
responses and operates also over a wider range of applications than conventional converters.
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