BQ24750_07 Datasheet, PDF (3/38 Pages) Texas Instruments – Host-controlled Multi-chemistry Battery Charger with Integrated System Power Selector and AC Over-Power Protection

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bq24750
SLUS735 – DECEMBER 2006
C17 C18
10 mF 10 mF
C19
10 mF
ADAPTER +
ADAPTER -
C1
10 mF
P
Q1 (ACFET)
SI4435
R1
432 kW
1%
P
Q2 (ACFET)
SI4435
C2
0.1 mF
RAC
0.010 W
C3
0.1 mF
ACGOOD
PACK
THERMISTER
SENSE
R2 ^{66.5 kW}
VREF
VREF
1%
R3
5.6 kW
R5
1%
10 kW
R4 ^{118 kW}
HOST
R8 ^{43 kW}
R7
R9 100 kW
R10
66.5 kW
R6
10 kW
100 kW
C4
1 mF
GPIO
ADC
C5
100 pF
C6
C7
10 mF 10 mF
SYSTEM
ACN
PVCC
ACP
ACDRV
ACDET
BATDRV
AGND
HIDRV
bq24750 PH
ACGOOD
TS
BTST
REGN
SRSET
ACSET
VREF
LODRV
PGND
C8
1 mF
C9 0.1 mF
D1 BAT54
C10
1 mF
R11 100 kW
Q4
FDS6680A
L1
8.2 mH
C11
10 mF
C13
0.1 mF
Q5
FDS6680A
P
R_SR
0.010 W
C14
0.1 mF
Q3(BATFET)
SI4435
C12
10 mF
PACK +
PACK -
DPMDET
CELLS
CHGEN
VDAC
VADJ
SRP
SRN
BAT
ACOP
C16
0.47 mF
C15
0.1 mF
IADAPT
PowerPad
(1) Pull-up rail could be either VREF or other system rail.
(2) SRSET/ACSET could come from either DAC or resistor dividers.
A. V_IN=20 V, V_BAT = 3-cell Li-Ion, I_CHARGE = 3 A, I_{ADAPTER_LIMIT} = 4 A, T_BAT = 0-45°C
Figure 2. Typical System Schematic, Voltage and Current Programmed by Resistor
Part number
bq24750
ORDERING INFORMATION
Package
28-PIN 5 x 5 mm QFN
Ordering Number
(Tape and Reel)
bq24750RHDR
bq24750RHDT
Quantity
3000
250
PACKAGE THERMAL DATA
PACKAGE
QFN – RHD⁽¹⁾⁽²⁾
θ_JA
39°C/W
T_A = 70°C POWER RATING
2.36 W
DERATING FACTOR ABOVE T_A = 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.
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