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参数资料
| 型号： | IR3720MTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 15/20页 |
| 文件大小： | 0K |
| 描述： | IC POWER SUPPLY MONITOR 10-DFN |
| 标准包装： | 1 |
| 系列： | TruePower™ |
| 应用： | 电源监控器 |
| 电源电压： | 3.135 V ~ 3.465 V |
| 电流 - 电源： | 480µA |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘 |
| 供应商设备封装： | 10-DFN-EP（3x3） |
| 包装： | 标准包装 |
| 其它名称： | IR3720MTRPBFDKR |
OUTPUT REGISTER
V FS
The output register is loaded with a two’s compliment
factor of voltage, current, or power, depending on the
last request loaded into the configuration register. I 2 C
“Direct Data Format” is used. The value of the output
register is to be multiplied by a scale factor that is
derived from equations 1 and 2 above. Maximum
power is the product of maximum voltage and
The equations below convert digital counts to
engineering units:
Voltage = counts ? when configuration register
256
bits (d7, d6) are set to (01).
maximum current.
The range of valid values is indicated in Table 2
below.
Current = counts ?
V IG ? ( R CS1 + R CS2 )
256 ? R T ? DCR
when
configuration register bits (d7, d6) are set to (10).
V FS ? V IG ? ( R CS1 + R CS2 )
Table 2 Output Register Range of Returned
Values
Parameter Returned value Returned
(twos compliment value
Power = counts ? when
256 ? R T ? DCR
configuration register bits (d7, d6) are set to (00).
binary)
(decimal)
FS voltage
Zero voltage
+FS current
-FS current
+FS power
-FS power
0100 0000 0000 0000
0000 0000 0000 0000
0100 0000 0000 0000
1100 0000 0000 0000
0100 0000 0000 0000
1100 0000 0000 0000
256
0
256
-256
256
-256
There is but one output register, and it holds the
measurement type (voltage, current, or power) last
requested by the configuration register. It is
incumbent upon the user to establish correct
configuration before requesting a read.
READ_VOUT, READ_IOUT, and READ_POUT are
A binary point is implicitly located to the left of the first
six least significant figures, as in the example below.
equivalent in that each returns the contents of the
same output register.
SYYY YYYY YY.00 0000
The “S” above is the twos compliment sign bit, and
BIT#
d15:d0
OUTPUT REGISTER
Output variable, D0 is LSB
the “Y’s” are the twos compliment. Six zeros pad out
the two byte response. These padding zeros could be
considered a factor of the slope, which is allowed by
the Direct Data Format. The output register multiplied
by its scale factor K x yields the requested quantity in
engineering units of volts, amps, or watts.
RESERVED COMMAND
CODES
Command codes D2h through D5h, D7h, and D8h
are reserved for manufacturing use only and could
lead to undesirable device behavior.
Page 15 of 20
www.irf.com
09/09/08
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