ADP1043A Analog Devices, ADP1043A Datasheet - Page 38

• Manufacturer Part Number: ADP1043A
• Description: Digital Controller for Isolated Power Supply Applications
• Manufacturer: Analog Devices

ADP1043A
VALUE REGISTERS
Table 16. Register 0x10—First Flag ID
Bits
[7:4]
[3:0]
Table 17. Register 0x12—VS1/PWM Value (Input Voltage)
Bits
[15:0]
Table 18. Register 0x13—CS1 Value (Input Current)
Bits
[15:4]
[3:0]
Table 19. Register 0x14—CS1 × (VS1/PWM) Value (Input Power)
Bits
[15:0]
Name
Reserved
First flag ID
Name
Input voltage value
Name
Input current value
Reserved
Name
Input power value
R/W
R
R
R/W
R
R/W
R
R
R/W
R
Description
Reserved.
These bits record the flag that was set first. Restarting the power supply resets this register.
Reading this register also resets the register.
Bit 3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Description
This register contains the 16-bit input voltage information. Because the input voltage is normally on the
other side of the isolation barrier from the ADP1043A, the part does not directly sense the input
voltage. The input voltage is defined as the VS1 voltage divided by the PWM modulation. To read
the input voltage information, this register must be read using two consecutive read operations.
The eight bits of the first read return the eight MSBs of the input voltage information. The eight bits
of the second read return the eight LSBs of the input voltage information. To translate this reading
into the real input voltage, use the following equation:
V
where R1 and R2 are the external resistor divider values between the power supply output and the
VS1 pin. This reading does not take into account an external turns ratio on the main transformer.
Description
This register contains the 12-bit input current information. This value is derived from a voltage
measurement at the CS1 input. To read the input current information, this register must be read
using two consecutive read operations. The eight bits of the first read return the eight MSBs of the
input current information. The top four bits of the second read return the four LSBs of the input
current information. The range of the CS1 input pin is from 0 V to 1.38 V. This value has 12 bits of
resolution, which results in an LSB size of 337 μV. At 0 V input, the value in this register is 0 (0x000).
At 1.3 V input, the value in this register is 3856 (0xF10). The nominal voltage at this pin is 1 V.
At 1 V input, the value in this register is 2968 (0xB98).
Reserved.
Description
This register contains the 16-bit input power information. This value is the product of the input
voltage (VS1/PWM) multiplied by the input current (CS1), that is, (VS1/PWM) × CS1. To read the
input power information, this register must be read using two consecutive read operations. The
eight bits of the first read return the eight MSBs of the input power information. The eight bits of
the second read return the eight LSBs of the input power information.
INPUT
= (Input_Voltage_Value_Reading/2643) × ((R1 + R2)/R2)
Bit 2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Rev. 0 | Page 38 of 72
Bit 1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Bit 0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Flag
None
Register 0x01, Bit 3
Register 0x01, Bit 2
Register 0x03, Bit 1
Register 0x00, Bit 2
Register 0x00, Bit 1
Register 0x00, Bit 0
Register 0x01, Bit 1
Register 0x01, Bit 0
Register 0x02, Bit 0
Register 0x02, Bit 7
Register 0x01, Bit 6
Register 0x01, Bit 5
Register 0x01, Bit 7
Register 0x02, Bit 5
Register 0x03, Bit 2
Error
No flag
VCORE OV
VDD OV
EEPROM CRC
CS1 fast OCP
CS1 accurate OCP
CS2 accurate OCP
Load OVP
Local OVP
FLAGIN
OTP
UVP
Reverse voltage
Voltage continuity
Share bus
ACSNS