Texas Instruments BQ24765 Evaluation Module for SMBus Controlled Battery Charger with Integrated FETs BQ24765EVM BQ24765EVM Datenbogen
Produktcode
BQ24765EVM
C
E
SD
A
SC
L
P
G
N
D
PG
N
D
PH
ASE
DCINP
PGND
CSSN
CSSP
VREF
PHASE
PHASE
PHASE
BOOT
DCINA
VI
C
M
PG
N
D
bq24765
34 LD
QFN
TOP VIEW
DCINP
DCINP
VDDP
ICOUT
1
34
7
29
23
2
3
4
5
6
28
27
26
25
24
33
32
31
ICREF
ACIN
CSOP
CSON
9
21
8
22
EAO
EAI
FBO
VFB
AGND
ACOK
10
11
12
20
19
18
VD
D
SM
B
PH
ASE
30
13
14
15
16
17
www.ti.com
SLUS999 – NOVEMBER 2009
SMBus-Controlled Multi-Chemistry Battery Charger With Integrated Power MOSFETs
Check for Samples :
1
FEATURES
–
< 10-
μ
A Battery Current with Adapter
Removed
•
Integrated Power MOSFETs, NMOS-NMOS,
Synchronous Buck Converter
Synchronous Buck Converter
–
< 1 mA Input DCINA Current When Adapter
Present and Charge Disabled
Present and Charge Disabled
•
>95% Efficiency
•
34-pin, 3.5mmx7mm QFN Package
•
Frequency 700kHz Allows Smaller Inductor
(5mm x 5mm)
(5mm x 5mm)
APPLICATIONS
•
Thermal Regulation Loop for Safety, Limit T
J
=
•
Notebook and Ultra-Mobile Computers
120°C
•
Portable Data-Capture Terminals
•
Adaptive Driver Dead-time and 99.5%
•
Portable Printers
Maximum Effective Duty Cycle
•
Medical Diagnostics Equipment
•
High-Accuracy Voltage and Current Regulation
•
Battery Bay Chargers
–
±0.5% Charge Voltage Accuracy
•
Battery Back-up Systems
–
±3% Charge Current Accuracy
–
±3% Adapter Current Accuracy
DESCRIPTION
–
±2% Input Current Sense Amp Accuracy
The
bq24765
is
a
high-efficiency,
synchronous
•
Integration
battery charger with two integrated 30m
Ω
NMOS
power MOSFETs, and an integrated input current
–
Integrated Power MOSFETs
comparator,
offering
low
component
count
for
–
Input Current Comparator
space-constraint, multi-chemistry battery charging
–
Internal Soft-Start
applications.
Input
current,
charge
current,
and
•
Safety
charge voltage DACs allow for very high regulation
accuracies that can be easily programmed by the
accuracies that can be easily programmed by the
–
Thermal Regulation Loop and Thermal
system power management micro-controller using
Shutdown
SMBus. The bq24765 has switching frequency of
–
Dynamic Power Management (DPM)
700kHz. The bq24765 charges 2, 3, or 4 series Li+
–
Power FETs Over Current Protection
cells, and is available in a 34-pin, 3.5mmx7mm QFN
package.
package.
•
7 V–24 V AC/DC-Adapter Operating Range
•
Simplified SMBus Control
–
Charge Voltage DAC (1.024 V–19.2 V)
–
Charge Current DAC (128 mA–8.064 A)
–
Adapter Current Limit DPM DAC (256
mA–11.008 A)
mA–11.008 A)
•
Status and Monitoring Outputs
–
AC/DC Adapter Present with Adjustable
Voltage Threshold
Voltage Threshold
–
Input Current Comparator, With Adjustable
Threshold and Hysteresis
Threshold and Hysteresis
–
Current Sense Amplifier for Current Drawn
From Input Source
From Input Source
•
Charge Any Battery Chemistry: Li+, LiFePO4,
NiCd, NiMH, Lead Acid (2, 3, and 4 Li-Ion Cells)
NiCd, NiMH, Lead Acid (2, 3, and 4 Li-Ion Cells)
•
Charge Enable Pin (CE)
•
Energy Star Low Iq
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.