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BQ24751RHDRG4 Datasheet, PDF (3/38 Pages) Texas Instruments – Host-controlled Multi-chemistry Battery Charger | |||
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bq24751
www.ti.com............................................................................................................................................... SLUS734D â DECEMBER 2006 â REVISED MARCH 2009
ADAPTER +
ADAPTER -
ACGOOD
R10
2â¦
C1
2.2 µF
P
Q1 (ACFET)
SI4435
P
Q2 (ACFET)
SI4435
C2
0.1 µF
RAC
0.010 â¦
C3
0.1 µF
R1
432 kâ¦
1%
R2
66.5 kâ¦
1%
VREF
R5
10 kâ¦
R3
422 kâ¦
1%
VREF
R8
100 kâ¦
R9
66.5 kâ¦
HOST
R4
71 kâ¦
1%
VREF
R7
100 kâ¦
R11
43 kâ¦
C4
1 µF
GPIO
VREF
REGN
ADC
C5
100 pF
ACN
PVCC
ACP
ACDRV
ACDET
BATDRV
AGND
HIDRV
bq24751 PH
ACGOOD
OVPSET
BTST
REGN
SRSET
ACSET
VREF
LEARN
CELLS
CHGEN
VDAC
VADJ
IADAPT
LODRV
PGND
SRP
SRN
BAT
ACOP
PowerPad
C6 C7
10 µF 10 µF
SYSTEM
C8
0.1 µF
Q4
FDS6680A
L1
8.2 µH
P
RSR
0.010 â¦
D1
BAT54
C10
1 µF
C9
0.1 µF
C11
10 µF
C13
0.1 µF
Q5
FDS6680A
C14
0.1 µF
Q3(BATFET)
SI4435
C12
10 µF
PACK+
PACK-
C16
0.47 µF
C15
0.1 µF
(1) Pull-up rail could be either VREF or other system rail.
(2) SRSET/ACSET could come from either DAC or resistor dividers.
VIN = 20 V, VBAT = 3-cell Li-Ion, Icharge = 3 A, Iadapter_limit = 4 A
Figure 2. Typical System Schematic, Voltage and Current Programmed by Resistor
PART NUMBER
bq24751
ORDERING INFORMATION
PACKAGE
28-PIN 5 x 5 mm QFN
ORDERING NUMBER
(Tape and Reel)
bq24751RHDR
bq24751RHDT
QUANTITY
3000
250
PACKAGE THERMAL DATA
PACKAGE
QFN â RHD(1)(2)
θJA
39°C/W
TA = 70°C
POWER RATING
2.36 W
DERATING FACTOR
ABOVE TA = 25°C
0.028 W/°C
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
Web site at www.ti.com.
(2) This data is based on using the JEDEC High-K board and the exposed die pad is connected to a Cu pad on the board. This is
connected to the ground plane by a 2x3 via matrix.
Copyright © 2006â2009, Texas Instruments Incorporated
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