Texas Instruments SLUU477 - Manual (Page 2)

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1 Introduction
1.1 EVM Features
• Evaluation Module for bq24210
• 800mA, Single-Input, Single Cell Li-Ion Battery Solar Charger with Power Path
• Resistor-programmable setting for charge current and input voltage dynamic power management
• LED Indication for Status
• Test Points for Key Signals Available for Testing Purpose – Easy Probe Hook-up
• Jumpers Available – Easy to Change Setting
1.2 General Description
The bq24210 series of devices are highly integrated Li-ion linear chargers devices targeted at
space-limited portable applications. The high input voltage range with input overvoltage protection
supports low-cost unregulated adapters. The input voltage regulation loop with programmable input
voltage regulation threshold make it suitable for charging from alternative power sources, such as solar
panel or inductive charging pad. The IC has a single power output that charges the battery. A system load
can be placed in parallel with the battery as long as the average system load does not keep the battery
from charging fully during the 10 hour safety timer.
The battery is charged in three phases: conditioning, constant current and constant voltage. In all charge
phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an
internal temperature threshold is exceeded.
For details, see BQ24210 data sheet ( SLUSA76 ).
1.3 I/O Description
Table 1. I/O Description
Jack Description
J1–VBUS Positive input
J1–GND Negative input
J2–BAT Charger output
J2–GND Ground
J2–TS Temperature qualification input
J3-GND Ground
J3-VDPM Programs the input voltage regulation threshold
J3-CHG Charge status indication
J3-EN Chip enable control
J3-PG Power present indication
J4-ISET Programs the fast-charge current setting
J4-VTSB TS bias reference voltage pin, regulated output
J4-GND Ground
2 800mA, Single-Input, Single Cell Li-Ion Battery Solar Charger with Power Path SLUU477 – December 2010
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