Texas Instruments bq24750, User Manual

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Introduction
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• Test Points for Key Signals Available for Testing Purpose. Easy Probe Hook-up
• Jumpers Available, Easy to Change Connections
1.2 General Description
The bq24750/50A/51/51A/51B/52/53 evaluation module is a complete charger module for evaluating a
multi cell synchronous notebook charge and path selection solution using the
bq24750/50A/51/51A/51B/52/53 devices. It is designed to deliver up to 6A of charge current to Li-Ion or
Li-Pol applications. The charge current is programmable by external voltage input.
The bq24750/50A/51/51A/51B/52/53 has a highly integrated battery charge controller designed to work
with external host commands. The battery voltage, charge current, input current limit and other system
parameters are pin-programmable.
The dynamic power management (DPM) function modifies the charge current depending on system load
conditions, avoiding ac adapter overload.
High accuracy current sense amplifiers enable accurate measurement of the ac adapter current, allowing
monitoring of overall system power.
For details, see the bq24750 data sheet ( SLUS735 ) , the bq24750A data sheet ( SLUS834 ), the bq24751
data sheet ( SLUS734 ), the bq24751A data sheet ( SLUS756 ), the bq24751B data sheet ( SLUS835 ) and
the bq24753 data sheet ( SLUS885 ).
1.3 I/O Description
Jack Description
J1–ACPWR AC adapter, positive output
J1–PGND AC adapter, negative output
J2–VADJ VADJ pin (12)
J2–ACSET ACSET pin (6)
J2–SRSET SRSET pin (16)
J3–CHGEN CHGEN pin (1)
J3–CELLS CELLS pin (20)
J4–VEXT External power supply, positive output
J4–GND External power supply, negative output
J5–VREF IC reference voltage VREF
J5–VDAC VDAC pin (11)
J5–VDACEXT External VDAC voltage
J5–GND Ground
J6–TS TS pin (8) output for bq24750/50A/52, OVPSET pin (8) output for bq24751/51A/51B/53
J6–PGND Ground
J6–BAT Connected to battery pack
J6–SYS Connected to system
J7–ACGOOD ACGOOD pin (13)
J7–IOUTF R21 terminal connected to C23
J7–VREF IC reference voltage VREF
J7–DPMDET pin number 21, DPMDET for bq24750/50A/52, LEARN for bq24751/51A/51B/53
JP1–1 bq24751/51A/51B/53 OVPSET resistor divider for bq24751/51A/51B/53
JP1–2 Pin 8
JP1–3 bq24750/50A/52 TS resistor divider for bq24750/50A/52
JP2–1 Pin 21, LEARN for bq24751/51A/51B/53
LEARN DISA
JP2–2 Ground
JP3–1 ACDRV pin (4) output
ACDRV
JP3–2 LED drive
2 bq24750/50A/51/51A/51B/52/53 EVM (HPA207) For Multi —Cell Synchronous SLUU283D – May 2007 – Revised March 2010
Notebook Charger and System Power Selector
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