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參數(shù)資料
| 型號： | AS8846 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Programmable PWM DC Motor Driver / Controller |
| 中文描述： | 可編程的PWM直流電動機驅動器/控制器 |
| 文件頁數(shù)： | 30/35頁 |
| 文件大?。?/td> | 1433K |
| 代理商： | AS8846 |
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Data Sheet AS8446
Revision 1.8, Date 2005-03-17
Page 30 of 35
Battery Voltage Monitor and Over / Under Voltage Detection
The Battery voltage monitor has to deliver an analog voltage Vbat_mon in the 5V range which is proportional to the high voltage
supply Vbat (normally VDDH = Vbat). The measurement range of the supply voltage Vbat is programmable via the register
R11<2:0> to adapt the AS8446 to different application supply voltages.
Programming of the MEASUREMENT RANGE of Vbat (programmed by register R11<2:0>
PARAMETER
Programming Register R11
R11= 0
VBAT_RANGE = 5
R11= 1
VBAT_RANGE = 8
R11= 2
VBAT_RANGE = 10
R11= 3
VBAT_RANGE = 15
of Vbat
R11= 4
VBAT_RANGE = 20
Note (1):
The programmable value of VBAT_RANGE determines the max. value of Vbat measurable by the voltage
monitor (condition: Vbat / VBAT_RANGE < 4 V).
Note (2):
VBAT must not exceed the specified abs. Max. ratings (see Table 3)
VBAT_RANGE)
UNIT
V
V
V
V
V
SYMBOL
Vbat
max1
Vbat
max2
Vbat
max3
Vbat
max4
Vbat
max5
MIN
MAX
20
32
40
60
80
NOTE
Programmable
Measurement
Voltage Ranges
(1)
PARAMETER
Tolerance of the division factor
Tolerance of the programmed over voltage threshold
Tolerance of the programmed ounder voltage threshold
SYMBOL
MIN
- 6
-10
-10
MAX
+ 6
+10
+10
UNIT
%
%
%
NOTE
VBAT_RANGE
Vovervolt
Vundervolt
a)
Programming of the OVER VOLTAGE detection level of Vbat (programmed by register R12<2:0>
R11<2:0>
VBAT_RANGE
)
Remark:
The maximum over voltage limit of Vbat for safe functionality of AS8446 is limited to Vbat < 30 V
and must be respected by appropriate programming
.
Programmable steps of OVER_VOLT = 0.25 V * VBAT_RANGE = (1.25 or 2.0 or 2.5 or 3.75 or 5.0 ) V
OVER_VOLT = 0.25 V * VBAT_RANGE * (R12 + 9) = 11.25 V ... 80 V
During an over voltage situation the write access to the Three Wire Interface is blocked and the driver is
switched off.
OVER_VOLT and
b)
Programming of the UNDER VOLTAGE detection level of Vbat (programmed by register R13<2:0>
and R11<2:0>
VBAT_RANGE)
Remark:
The minimium Vbat for full functionality of AS8446 is limited to Vbat > 6.5 V (except for Low-battery-
mode reduced functionality is still given between 6V and 6.5V, see Table 4Operating Conditions).
Programmable steps of UNDER_VOLT = 0.25 V * VBAT_RANGE = (1.25 or 2.0 or 2.5 or 3.75 or 5.0 ) V
UNDER_VOLT = 0.25 V * VBAT_RANGE * (R13 + 1) = 1.25 V ... 40 V
UNDER_VOLT
相關PDF資料 |
PDF描述 |
|---|---|
| AS8F128K32 | 128K x 32 FLASH FLASH MEMORY ARRAY |
| AS9C25128M2036L-166PI | 2.5V 256/128K X 36 Synchronous Dual-port SRAM with 3.3V or 2.5V interface |
| AS9C25256M2036L-200BC | 2.5V 256/128K X 36 Synchronous Dual-port SRAM with 3.3V or 2.5V interface |
| AS9C25128M2036L-200BC | 2.5V 256/128K X 36 Synchronous Dual-port SRAM with 3.3V or 2.5V interface |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AS8857-01-49K9F/TE | 制造商:Vishay Intertechnologies 功能描述:CRCW080549K9FKTA |
| AS8857-02-140KF/TE | 制造商:Vishay Angstrohm 功能描述:CRCW0805140KFKEA |
| AS8857-02-1K65F/TE | 制造商:Vishay Angstrohm 功能描述:CRCW08051K65FKEA |
| AS8857-02-3K57F/TE | 制造商:Vishay Angstrohm 功能描述:CRCW08053K57FKEA |
| AS8857-02-3K65F/TE | 制造商:Vishay Angstrohm 功能描述:CRCW08053K65FKEA |
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