Texas Instruments bq2415 Series, User Manual

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Introduction
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• LED Indication for Status Signals
• Test Points for Key Signals Available for Testing Purpose. 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.
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.
The charge parameters can be programmed through an I
2
C interface.
For details, see the bq2415x data sheets ( SLUS824 , SLUS847 , SLUSA27 , and SLUS931 ).
1.3 I/O Description
Jack Description
J1–DC+ AC adapter or USB, positive output
J1–DC– AC adapter or USB, negative output
J2–BAT– Battery negative terminal, connect to DC-
J2-AUXPWR/CD Connect to AUXPWR pin or CD pin
J2-BAT+ Charger positive output, connect to CSOUT pin
J3–SCL I
2
C clock, connect to SCL pin
J3–SDA I
2
C 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 Connect to OTG/SLRST pin
J4–DC– AC adapter or USB, negative output
1.4 Control and Key Parameters Setting
Jack Description Factory Setting
LED 1-2: Connect STAT pin to LED on EVM
JMP1 Jumper On LED (1-2)
EXT 2-3: Connect STAT pin to J4-1
HI 1-2: OTG or SLRST high (input or battery voltage)
JMP2
LO 2-3: OTG or SLRST low (ground)
See Table 1
JMP3 J2-BAT+ connect to J2-AUXPWR/CD
JMP4 AUXPWR/CD pin connect to high or low or float
JMP5 OTG/SLRST pin 10k resistor to ground or float Jumper ON
1.5 Recommended Operating Conditions
Min Typ Max Unit Notes
Supply voltage, V
IN
Input voltage from ac adapter input 4 5 6 V
Battery voltage, V
BAT
Voltage applied at VBAT terminal of J8 0 3-4.2 4.44 V
Supply current, I
AC
Maximum input current from ac adapter input 0 0.1–0.5 1.5 A
Charge current, I
chrg
Battery charge current 0.55 0.7 1.25 A
Operating junction temperature range, T
J
0 125 °C
2 bq2415x YFF EVM SLUU321B – June 2008 – Revised May 2010
Copyright © 2008–2010, Texas Instruments Incorporated