Texas Instruments TPS61085 Evaluation Module TPS61085EVM-355 TPS61085EVM-355 Datenbogen
Produktcode
TPS61085EVM-355
Setup and Test Results
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Table 1. Performance Specification Summary
SPECIFICATION
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V
IN
2.3
6
V
V
OUT
(1)
TPS61085EVM, V
IN
= 3.3 V +/- 2%, I
OUT
< 300 mA, f
SW
= 1.2 MHz
11.6
12
12.4
V
(1)
Min and Max values include 1% resistor tolerance as well as IC reference tolerance.
2
Setup and Test Results
This section describes how to properly connect, set up, and use the TPS61085EVM.
2.1
Input/Output Connections
The connection points are described in the following paragraphs.
2.1.1
J1-VIN
This header is the positive connection to the input power supply. The power supply must be connected
between J1 and J3 (GND). The leads to the input supply should be twisted and kept as short as possible.
The input voltage has to be between 2.3 V and 6 V.
between J1 and J3 (GND). The leads to the input supply should be twisted and kept as short as possible.
The input voltage has to be between 2.3 V and 6 V.
2.1.2
J2-VIN Sense Connector
This header is not populated, but is planned to be used to measure the input voltage directly on the input
capacitor. Therefore a 4-wire power & sense supply can be connected. The leads to the sensing
connector should also be twisted.
capacitor. Therefore a 4-wire power & sense supply can be connected. The leads to the sensing
connector should also be twisted.
2.1.3
J3-GND
This header is the return connection to the input power supply. Connect the power supply between these
pins and J1 (VIN). The leads to the input supply should be twisted and kept as short as possible. The
input voltage has to be between 2.3 V and 6 V.
pins and J1 (VIN). The leads to the input supply should be twisted and kept as short as possible. The
input voltage has to be between 2.3 V and 6 V.
2.1.4
J4-Vs
This header is the positive connection of the output voltage. The load has to be connected between J4
and J6 (GND).
and J6 (GND).
2.1.5
J5-Vs Sense Connector
This header is not populated, but is planned to be used to measure the output voltage directly on the
output capacitors.
output capacitors.
2.1.6
J6-GND
This header is the return connection of the output voltage. Connect the load between these pins and J4
(Vs).
(Vs).
2.1.7
JP1-EN
Placing a jumper across pins 1 and 2 ties the EN pin to VIN, thereby enabling the device. Placing a
jumper across pins 2 and 3 ties the EN pin to GND, which disables the device.
jumper across pins 2 and 3 ties the EN pin to GND, which disables the device.
2.1.8
JP2-FREQ
The middle pin of this jumper connects to the FREQ pin of the IC. Placing this jumper across pins 1 and 2
ties the FREQ pin to V
ties the FREQ pin to V
IN
, thereby implementing a 1.2 MHz switching frequency. Placing this jumper across
pins 2 and 3 ties the FREQ pin to ground, thereby implementing a 650 kHz switching frequency.
2
TPS61085EVM
SLVU265A – August 2008 – Revised October 2010
Copyright © 2008–2010, Texas Instruments Incorporated