ade7169f16 Analog Devices, Inc., ade7169f16 Datasheet - Page 28

• Manufacturer Part Number: ade7169f16
• Description: Single-phase Energy Measurement Ic With 8052 Mcu, Rtc And Lcd Driver
• Manufacturer: Analog Devices, Inc.

ADE7169F16
(IPSME, 0xEC) enables this event to generate a PSM interrupt.
This event associated with the SAG monitoring can be used to
detect a power supply - V
further actions prior to decide a switch of V
SAG Monitor PSM Interrupt
The ADE7169F16 energy measurement DSP monitors the ac
voltage input at the V
is used to set the threshold for a line voltage sag event. The
SAGF bit in the Power Management Interrupt Flag SFR (IPSMF,
0xF8) is set if the line voltage stays below the level set in the
SAGLVL register for the number of line cycles set in the
SAGCYC register, - see Line Voltage Sag Detection section.
Figure 12 shows the sequence of events that will be generated
for the power meter application in Figure 11 if the main power
supply generated by the PSU starts to fail. The sag detection can
provide the earliest warning of a potential problem on V
When a sag event occurs, the user code can be configured to
backup data and prepare for battery switchover if desired. The
relative spacing of these interrupts will depend on the design of
(240, 220, 110V typical)
ac input
PSU
5 - 12V dc
P
and V
DD
- being compromised and trigger
N
input pins. The SAGLVL register
Regulator
3.3V
Figure 11. Power Supply Management for Energy Meter Application
DD
to V
V
BCTRL
SWOUT
V
BAT
V
DCIN
V
BAT
V
V
DD
.
P
N
DD
.
Rev. PrD | Page 28 of 140
Detection
SAG
Supervisory
Supervisory
Voltage
Voltage
Setting the ESAG bit in the Power Management Interrupt
Enable SFR (IPSME, 0xEC) enables this event to generate a
PSM interrupt.
USING THE POWER SUPPLY FEATURES
In an energy meter application, V
typically generated from the ac line voltage and regulated to
3.3V by a voltage regulator IC. The pre-regulated DC voltage,
typically 5V to 12V, can be connected to V
resistor divider. A 3.6V battery can be connected to V
11 shows how the ADE7169F16 power supply inputs would be
set up in this application.
the power supply.
Figure 13 shows the sequence of events that will be generated
for the power meter application shown in Figure 11 if the main
power supply starts to fail, with battery switchover on low V
or low V
DD
enabled.
Power Supply
Management
Preliminary Technical Data
DD
V
, the 3.3V power supply, is
SW
DCIN
(Addr. 0xF8)
through a
IPSMF SFR
BAT
. Figure
DCIN