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參數(shù)資料
| 型號(hào)： | MAX1774 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 32-Bit Digital Signal Controller with ROM 100-BGA MICROSTAR -40 to 125 |
| 中文描述： | 雙路、高效率、降壓型轉(zhuǎn)換器，帶有備用電池切換開關(guān) |
| 文件頁數(shù)： | 18/21頁 |
| 文件大?。?/td> | 398K |
| 代理商： | MAX1774 |
nals, and be close together to improve noise rejection.
These traces should be used for current-sense signal
routing only and should not carry any load current.
Refer to the
MAX1774 evaluation kit
for layout exam-
ples.
S etting the V oltage Monitor Levels
The low battery and dead battery detector trip points
can be set by adjusting the resistor values of the
divider string (R1, R2, and R3) in Figure 1 according to
the following equations:
R1 = (R2 + R3)
[(V
BD
/ V
TH
) - 1]
R2 = R3
[(V
BL
/ V
BD
) - 1]
where V
BL
is the low battery voltage, V
BD
is the dead
battery voltage, and V
TH
= +1.20V. Choose R3 to be
less than 250k
.
M
Dual, High-Effic ienc y, S tep-Down
Converter with Bac kup Battery S witc hover
18
______________________________________________________________________________________
Figure 5. Typical Application Circuit (with Recharge)
PGNDC
FBC
LXC
INC
FBM
CS-
CS+
PGND
PDRV
NDRV
CVH
MAIN
C5
L1
10
μ
H
C
MAIN
47
F
R
CS
CORE
C
CORE
22
F
R10
R11
R8
R9
L2
C7
1
μ
F
R5
1M
R6
1M
R7
1M
GND
REF
CVL
LXB
BIN
IN
DBI
LBI
ACI
BACKUP
BATTERY
MAIN
BATTERY
R1
R13
C2
10
μ
F
C3
C4
0.22
μ
F
C1
10
μ
F
P1
R4
R2
R3
R12
D1
BKOFF
BKUP
LBO
ACO
SHDNM
MDRV
MAX1774
L3
22
μ
H
V
IN_AC
SHDNC
C6
10
μ
F
P2
N1
ON
OFF
ON
OFF
1.0V
TO
5.5V
2.6V
TO
5.5V
FDS8928A
INS
1M
2.7V
TO
20V
2.7V
TO
28V
NDS356AP
NSD03A10
0.9V
TO
5.5V
LXB2 (QFN ONLY)
D2
EP05
Q03L
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1774EEI | Dual, High-Efficiency, Step-Down Converter with Backup Battery Switchover |
| MAX1774EMJ | 32-Bit Digital Signal Controller with ROM 100-LQFP -40 to 85 |
| MAX1775 | 32-Bit Digital Signal Controller with ROM 100-LQFP -40 to 125 |
| MAX1775EEE | 32-Bit Digital Signal Controller with ROM 100-LQFP -40 to 125 |
| MAX1776 | 32-Bit Digital Signal Controller with ROM 100-BGA MICROSTAR -40 to 85 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1774EEI | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1774EEI+ | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Dual Step-Down w/Switchover RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1774EEI+T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Dual Step-Down w/Switchover RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1774EEI-T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1774EGJ | 制造商:Maxim Integrated Products 功能描述: |
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