Texas Instruments Evaluation Module for BQ24140, 1.5A Dual Input Switchmode Charger with USB-OTG Support BQ24140EVM-003 BQ24140EVM-003 Scheda Tecnica
Codici prodotto
BQ24140EVM-003
Introduction
1
Introduction
1.1
EVM Features
•
High-efficiency, fully integrated, NMOS-NMOS, synchronous buck charger with 3-MHz frequency
•
Integrated power FETs for up to 1.55-A charge rate from either VIN or VBUS inputs
•
Programmable battery voltage, charge current, and input current via I
2
C™ interface
•
VIN operating range 4 V – 9 V and VBUS operating range 4 V – 6 V
•
Boost-mode operation for USB OTG from VBUS input while charging through VBAT
•
LED indication for status signals
•
Test points for key signals available for testing purposes. Easy probe hook-up
•
Jumpers available. Easy-to-change connections.
1.2
General Description
The bq24140 evaluation module (EVM) is a complete charger module for evaluating compact, flexible,
high-efficiency, USB-friendly, switch-mode charge management and USB-OTG solution for single-cell Li-
ion and Li-polymer batteries used in a wide range of portable applications.
high-efficiency, USB-friendly, switch-mode charge management and USB-OTG solution for single-cell Li-
ion and Li-polymer batteries used in a wide range of portable applications.
The bq24140, bq24145 integrates a synchronous PWM controller, power MOSFETs, input current
sensing, high-accuracy current and voltage regulation, and charge termination into a small WCSP
package. The charge parameters can be programmed through an I
sensing, high-accuracy current and voltage regulation, and charge termination into a small WCSP
package. The charge parameters can be programmed through an I
2
C interface.
For details, see the bq24140 data sheet. (
1.3
I/O Description
Header/Terminal Block
Description
J1–VIN
AC adapter positive input terminal
J1–GND
AC adapter negative input terminal
J2
USB-TO-GPIO box connector
J3-VBUS
USB positive input terminal
J3-GND
USB negative input terminal
J4-VIN
AC adapter positive input header
J5–GND
AC adapter negative input header
J6-VBUS
USB positive input header
J7-VBAT
Battery positive output terminal
J7-GND
Battery negative output terminal
J8-VREG
Internal regulator positive output terminal
J8-GND
Internal regulator negative output terminal
J9-GND
USB negative input header
J10-VBAT
Battery positive output header
J11-GND
Battery negative output header
J12-VREG
Internal regulator positive output header
J13-GND
Internal regulator negative output header
1.4
Test Point Descriptions
Test Point
Description
TP1
VIN
TP2
VBUS
TP3
PMID2
2
bq24140, Fully Integrated, Dual-Input, Switch-Mode, One-Cell, Li-Ion Charger
SLUU495A – October 2011 – Revised September 2012
With Full USB Compliance and USB-OTG Support EVM
Copyright © 2011–2012, Texas Instruments Incorporated