BQ24750_07 Datasheet, PDF (27/38 Pages) Texas Instruments – Host-controlled Multi-chemistry Battery Charger with Integrated System Power Selector and AC Over-Power Protection

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10 mF 10 mF 10 mF
bq24750
SLUS735 – DECEMBER 2006
ADAPTER +
ADAPTER -
C1
10uF
P
Q1 (ACFET)
SI4435
P
Q2 (ACFET)
SI4435
C2 0.1uF
RAC
0.010
C3
0.1uF
ACDRV
ACN
ACP
ACDRV_ON
ACOC ERROR
AMPLIFIER &
DRIVER
-
+
ACOCREG =
REGULATING
IIN
Differential Amp
CSA
V(ACP-ACN)
IADAPT
Regulation
Reference
Lowest of
1. 5xIDPM_ PRG
or
IDPM
IDPM_PRG Ratio-
metric
Program
10A (100mV) (100 mV_max)
ACSET
PVCC
VDS
Differential Amp
V(PVCC-ACP)
ACOP
Cacop
0.47uF
REF=3.3V
ENA_SRC
ENA_SNK
5uA
Isrc=K*V(PVCC- ACP)
18 mA/V
ACOP Adaptor
Over Power
Comparator
+ ^ACOPDET Deglitch
-
1 ms
ACOPDETDG
+
-
2V
SQ
RQ
ACDET
PVCC_UVLO
700 ms
ACDET _Delay
ACDRV &
BATDRV
break-
before-make
logic
Turn-off ACDRV
To Clear LATCH User must remove adapter
and reinsert, or PVCC brough below then
above input UVLO threshold in order to clear
latched fault
Figure 35. ACOC / ACOP Circuit Functional Block Diagram
Table 2. Component List for Typical System Circuit of Figure 1
PART DESIGNATOR
Q1, Q2, Q3
Q4, Q2
D1
R_AC, R_SR
L1
C1, C6, C7, C11, C12
C4, C8, C10
C2, C3, C9, C13, C14, C15
C5
C16
R5, R6
R1
R2
R3
QTY
3
2
1
2
1
5
3
6
1
1
2
1
1
1
DESCRIPTION
P-channel MOSFET, –30 V, –6 A, SO-8, Vishay-Siliconix, Si4435
N-channel MOSFET, 30 V, 12.5 A, SO-8, Fairchild, FDS6680A
Diode, Dual Schottky, 30 V, 200 mA, SOT23, Fairchild, BAT54C
Sense Resistor, 10 mΩ, 1%, 1 W, 2010, Vishay-Dale, WSL2010R0100F
Inductor, 10 µH, 7 A, 31 mΩ, Vishay-Dale, IHLP5050FD-01
Capacitor, Ceramic, 10 µF, 35 V, 20%, X5R, 1206, Panasonic, ECJ-3YB1E106M
Capacitor, Ceramic, 1 µF, 25 V, 10%, X7R, 2012, TDK, C2012X7R1E105K
Capacitor, Ceramic, 0.1 µF, 50 V, 10%, X7R, 0805, Kemet, C0805C104K5RACTU
Capacitor, Ceramic, 100 pF, 25 V, 10%, X7R, 0805, Kemet
Capacitor, Ceramic, 0.47 µF, 25 V, 10%, X7R, 0805, Kemet
Resistor, Chip, 10 kΩ, 1/16 W, 5%, 0402
Resistor, Chip, 432 kΩ, 1/16 W, 1%, 0402
Resistor, Chip, 66.5 kΩ, 1/16 W, 1%, 0402
Resistor, Chip, 5.6 kΩ, 1/16 W, 1%, 0402
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