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參數資料
| 型號： | ADP3802 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | High Frequency Switch Mode Dual Li-Ion Battery Chargers(高頻開關模式雙鋰離子充電器) |
| 中文描述： | 高頻開關雙鋰離子電池充電器（高頻開關模式雙鋰離子充電器） |
| 文件頁數： | 8/20頁 |
| 文件大小： | 278K |
| 代理商： | ADP3802 |
ADP3801/ADP3802
–8–
REV. 0
BIAS
LDO
RESET
GATE
DRIVE
FF
S
VI
N
CS+
OSCILLATOR
D1
L
R
CS
V
REF
3.3V
UVLO
R
BATA
ISET
A/B
CS–
(FROM
m
C)
Rf2
Rf1
COMP
1
m
F
V
REF
POWER-
ON
RESET
(FROM
m
C)
(TO
m
C)
(TO
m
C)
FINAL
VBAT
PROG
GND
MUX
PROG
(FROM
m
C)
2.475V
ADJ
VCC
V
REF
3R
DRV
VL
D2
RB
SD
BATA
1
m
F
CI
N
COUT
EOC
Q
VT
ADP3801/ADP3802
100k
V
BATB
GM1
GM2
GM3
R
100k
V
V
REF
Figure 20. Simplified Application Diagram
Setting the Final Battery Voltage
The final battery voltage is determined by the voltage on the
Battery Programming (PROG) pin. This pin controls the state
of the PROG multiplexer, which selects the appropriate tap
from the internal battery voltage resistor divider. The specifica-
tion table details the PROG voltages for each final battery volt-
age. A resistor divider from the LDO can be used to set the
PROG voltage as shown in Figure 21. To provide fail safe op-
eration, a PROG voltage equal to 0.0 V or 3.3 V results in the
minimum final battery voltage of 4.2 V. The PROG input is
high impedance, so the voltage can be set with a high imped-
ance resistor divider from VL. Alternatively, a PWM output
from a microcontroller can be used with an RC filter to generate
the desired threshold voltage.
VL
R1
4.2
V
T1
= 0.0V
0*
8.4
V
T2
= 1.1V
200k
V
100k
V
12.6
V
T3
= 2.2V
100k
V
200k
V
V
BAT
SETTING
R1 (5%)
R2 (5%)
R2
PROG
*CONNECT PROG TO
GND FOR V
BAT
= 4.2V
Figure 21. Resistor Divider Sets the Final Battery Voltage
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADP3802AR | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Frequency Switch Mode Dual Li-Ion Battery Chargers |
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| ADP3804JRU | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Frequency Switch Mode Li-Ion Battery Charger |
| ADP3804JRU-125 | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Frequency Switch Mode Li-Ion Battery Charger |
| ADP3804JRU-126 | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Frequency Switch Mode Li-Ion Battery Charger |
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