参数资料
型号: ADE7116ASTZF8
厂商: Analog Devices Inc
文件页数: 35/152页
文件大小: 0K
描述: IC ENERGY METER 64-LQFP
产品变化通告: Product Discontinuance 27/Oct/2011
标准包装: 160
输入阻抗: 770 千欧
测量误差: 0.1%
电压 - 高输入/输出: 2V
电压 - 低输入/输出: 0.8V
电流 - 电源: 4mA
电源电压: 2.4 V ~ 3.7 V
测量仪表类型: 单相
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-LQFP
供应商设备封装: 64-LQFP(10x10)
包装: 托盘
ADE7116/ADE7156/ADE7166/ADE7169/ADE7566/ADE7569
USING THE POWER SUPPLY FEATURES
In an energy meter application, the 3.3 V power supply (V DD ) is
typically generated from the ac line voltage and regulated to 3.3 V
by a voltage regulator IC. The preregulated dc voltage, typically
5 V to 12 V, can be connected to V DCIN through a resistor divider.
A 3.6 V battery can be connected to V BAT . Figure 34 shows how
the ADE7116/ADE7156/ADE7166/ADE7169/ADE7566/
ADE7569 power supply inputs are set up in this application.
Figure 35 shows the sequence of events that occurs if the main
power supply generated by the PSU starts to fail in the power
meter application shown in Figure 34. The SAG detection can
provide the earliest warning of a potential problem on V DD .
When a SAG event occurs, user code can be configured to back up
data and prepare for battery switchover if desired. The relative
spacing of these interrupts depends on the design of the power
supply.
Figure 36 shows the sequence of events that occurs if the main
power supply starts to fail in the power meter application shown
in Figure 34, with battery switchover on low V DCIN or low V DD
enabled.
Finally, the transition between V DD and V BAT and the different
power supply modes (see the Operating Modes section) are
represented in Figure 37 and Figure 38.
(240V, 220V, 110V TYPICAL)
BCTRL 45
AC INPUT
V P
V N
49
50
SAG
DETECTION
5V TO 12V DC
V DCIN
64
VOLTAGE
SUPERVISORY
VOLTAGE
SUPERVISORY
POWER SUPPLY
MANAGEMENT
IPSMF SFR
(ADDR. 0xF8)
PSU
3.3V
REGULATOR
V DD
60
V SW
V SWOUT 61
V BAT 58
Figure 34. Power Supply Management for Energy Meter Application
V P – V N
SAG LEVEL TRIP POINT
SAGCYC = 1
V DCIN
1.2V
V DD
t 1
2.75V
t 2
SAG EVENT
(FSAG = 1)
V DCIN EVENT
(FVDCIN = 1)
IF SWITCHOVER ON LOW V DD IS ENABLED,
AUTOMATIC BATTERY SWITCHOVER
OCCURS. V SWOUT IS CONNECTED TO V BAT .
BSO EVENT
(FBSO = 1)
Figure 35. Power Supply Management Interrupts and Battery Switchover with Only V DD Enabled for Battery Switchover
Rev. B | Page 35 of 152
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