Texas Instruments Evaluation Module for BQ24155 Fully Integrated Switch-Mode One-Cell Li-Ion Charger BQ24155EVM BQ24155EVM 데이터 시트
제품 코드
BQ24155EVM
Introduction
www.ti.com
1
Introduction
1.1
EVM Features
•
Evaluation module for bq2415x
•
High-efficiency, fully integrated NMOS-NMOS synchronous buck charger with 3-MHz frequency
•
Integrated power FETs for up to 1.25-A charge rate
•
Programmable battery voltage, charge current, and input current via I
2
C™ interface
•
Input operating range 4 V–6 V
•
Boost mode operation for USB OTG
•
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 bq2415x evaluation module is a complete charger module for evaluating compact, flexible,
high-efficiency, USB-friendly switch-mode charge management 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 solution for single-cell Li-ion and
Li-polymer batteries used in a wide range of portable applications.
The bq2415x integrates a synchronous PWM controller, power MOSFETs, input current sensing,
high-accuracy current and voltage regulation, and charge termination, into a small WCSP package.
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 bq2415x data sheet (
).
1.3
I/O Description
Table 1. Input/Output Jack Descriptions
Jack
Description
J1–DC+
AC adapter or USB, positive output
J1–DC–
AC adapter or USB, negative output
J2–BAT+
Charger positive output, connect to CSOUT pin
J2–AUXPWR/CD
Connect to AUXPWR/CD pin
J2–BAT–
Battery negative terminal, connect to DC-
J3–SCL
I2C clock, connect to SCL pin
J3–SDA
I2C data, connect to SDA pin
J3–DC–
AC adapter or USB, negative output
J4–STAT
Status output, can be connected to STAT pin by JMP1 set to EXT (2-3)
J4–OTG/SLRST/TS/ISEL
Connect to OTG/SLRST/TS/ISEL pin
J4–DC–
AC adapter or USB, negative output
1.4
Controls and Key Parameters Setting
Table 2. Control and Key Parameters Settings for JMP1 Through JMP5
Jack
Description
Factory Setting
JMP1
LED 1-2: Connect STAT pin to LED on EVM
Jumper On LED (1-2)
EXT 2-3: Connect STAT pin to J4-1
JMP2
HI 1-2: OTG/SLRST/TS/ISEL high (input or battery voltage)
See table below
LO 2-3: OTG/SLRST/TS/ISEL low (ground)
JMP3
J2-BAT+ connect to J2-AUXPWR/CD
See table below
JMP4
AUXPWR/CD pin connect to high or low or float
See table below
JMP5
OTG/SLRST/TS/ISEL pin 10k resistor to ground or float
Jumper On
2
bq2415x RGY EVM (HPA255)
SLUU366A – March 2010 – Revised April 2010
Copyright © 2010, Texas Instruments Incorporated