Texas Instruments Evaluation Module for TPS65252, 4.5V to 16V INPUT with 2 BUCK CONVERTER and 1x USB switch TPS65252EVM TPS65252EVM Datenbogen
Produktcode
TPS65252EVM
www.ti.com
1
Introduction
This document presents the information required to power the TPS65252 PMIC as well as the support
documentation including schematic and bill of materials.
documentation including schematic and bill of materials.
2
Background
The TPS65252 PMIC is designed to provide 3-A and 2-A continuous outputs with an operational range of
4.5 V to 18 V and a externally set switching frequency ranging from 300 kHz to 2.2 MHz. When the PMIC
is not fully loaded, buck1 can be loaded to 3.5 A and buck 2 to 2.5 A. It also features a power distribution
switch with selectable current limit.
4.5 V to 18 V and a externally set switching frequency ranging from 300 kHz to 2.2 MHz. When the PMIC
is not fully loaded, buck1 can be loaded to 3.5 A and buck 2 to 2.5 A. It also features a power distribution
switch with selectable current limit.
As there are many possible options to set the converters,
presents the performance specification
summary for the EVM.
Table 1. Input Voltage and Output Current Summary
EVM
TEST CONDITIONS
OUTPUT CURRENT RANGE
Buck1, 1.2 V, 3 A
V
IN
= 4.5 V to 16 V
TPS65252EVM
Buck2, 1.8 V, 2 A
f
sw
= 500 kHz
(25°C ambient)
This evaluation module is designed to provide access to the features of the TPS65252. Some
modifications can be made to this module to test performance at different input and output voltages,
current and frequency operation. Please contact TI Field Applications Group for advice on these matters.
modifications can be made to this module to test performance at different input and output voltages,
current and frequency operation. Please contact TI Field Applications Group for advice on these matters.
3
Schematic
See next page.
The resistor and capacitor values have been chosen according to the guidelines presented on the
TPS65252 spec available at
TPS65252 spec available at
Note that for the purpose of gains-phase measurements R9 and R11 (0
Ω
on the EVM) need to be
replaced by suitable low value resistors as per the network analyzer setup required. Test points are
provided on either end of the resistors to allow for easy measurement.
provided on either end of the resistors to allow for easy measurement.
5
SLVU438 – January 2011
List of Tables
© 2011, Texas Instruments Incorporated