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參數資料
| 型號： | AD5100YRQZ-RL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 電源管理 |
| 英文描述： | System-Management IC with Programmable Quad Voltage Monitoring and Supervisory Functions |
| 中文描述： | 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16 |
| 封裝： | 0.025 INCH PITCH, ROHS COMPLIANT, MO-137AB, QSOP-16 |
| 文件頁數： | 30/32頁 |
| 文件大?。?/td> | 495K |
| 代理商： | AD5100YRQZ-RL7 |
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AD5100
Preliminary Technical Data
Battery Monitoring with Fan Control
Rev. PrJ | Page 30 of 32
V
4MON
can be used with V
4OUT
intandem to form a simple PWM
control circuit. For example as shown in Figure 27, when a
temperature sensor output connects to the V
4MON
input, with
the proper threshold level set, V
4OUT
outputs high whenever the
temperature goes above the threshold. This turns on the FET
switch which activates the fan. When Vtemp drops below the
threshold, V
4OUT
decreases which turns off the fan.
AD5100
V
1MON
V
2MON
V
3MON
V
4MON
Battery
Ignition
Vreg
Vtemp
μ
P
SHDN
RESET
V
4OUT
SD_WRN
SCL
SDA
CLK
SD
VREG
CLK
MISO/MOSI
TMP35
Vtemp
Battery
PA
Vreg
/MR
/MR
WDI
WDI
/MR
WDI
Figure 27. Power Amp Monitoring and Fan Control
V
TEMP
V
4OUT
Note: V
4MON
reset disabled
V
4MON
Threshold
Figure 28. V
4OUT
with respect to Vtemp withV
4MON
reset disabled in circuit shown in Figure 27.
Battery State of Charge Indicator and Shutdown
Early Warning Monitoring
In the automotive application, the system designer may set the
battery threshold to the lowest level in order to allow an
automobile to start at the worst case condition. If the battery
remains at the low voltage level, it is indeed a poor battery.
However, there is no way to warn the driver. As a result, the
system designer may use V
4OUT
as the battery warning indicator.
By stepping down the battery voltage monitored at V
4MON
, the
LED is lit which gives a battery replacement warning. The
circuit is shown in Figure 29.
AD5100
V
2MON
V
1MON
V
4MON
Ignition
Battery
μ
P
V
4OUT
SCL
SDA
CLK
CLK
MISO/MOSI
SD_WRN
SHDN
Figure 29. Battery State of Charge Indication
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