ADP1046DC1-EVALZ Analog Devices, ADP1046DC1-EVALZ Datasheet - Page 60

• Manufacturer Part Number: ADP1046DC1-EVALZ
• Description: Daughter Cards & OEM Boards ADP1046 Daughter Card
• Manufacturer: Analog Devices
• Series: ADP1046r

Specifications of ADP1046DC1-EVALZ

• Rohs: yes
• Product: Daughter Cards
• Description/function: 100 kHz daughter board
• Interface Type: I2C
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 3.3 V
• Factory Pack Quantity: 1
• For Use With: ADP1046

Table 48. Register 0x30—OrFET
Bits
7
[6:5]
[4:2]
1
0
VOLTAGE SENSE REGISTERS
Table 49. Register 0x31—VS3 Voltage Setting (Remote Voltage)
Bits
[7:0]
ADP1046
Bit Name
OrFET enable
delay
OrFET enable
threshold
Fast OrFET
threshold
Fast OrFET
debounce
Fast OrFET
bypass
Bit Name
VS3 voltage setting
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
0 = delay of 328 µs, equivalent to 9 bits of (VS1 − VS2) data.
1 = delay of 164 µs, equivalent to 8 bits of (VS1 − VS2) data.
These bits program the voltage difference between VS1 and VS2 before the OrFET is enabled. The VS1
and VS2 input pins are used to control the OrFET enable function.
Bit 6
0
0
1
1
These bits program the threshold voltage difference between CS2+ and CS2− at which the OrFET is
disabled. The CS2+ and CS2− input pins are used to control this function. The internal circuit is an analog
comparator.
Bit 4
0
0
0
0
1
1
1
1
These bits determine the debounce on the fast OrFET control before it disables the OrFET.
0 = 40 ns.
1 = 200 ns.
Set this bit to completely bypass fast OrFET control. The action programmed for the OrFET flag is
executed, unless the flag is programmed to be ignored.
Description
This register is used to set the output voltage (voltage differential at the VS3+ and VS3− pins). Each
LSB corresponds to a 0.6% increase. Setting this register to a value of 0xA0 gives an output voltage
setting of 100% of the nominal voltage. This is the default value that is stored in this register when
the part is shipped from the factory. Updating the VS3 voltage setting is a two-stage process. The
user must first change the value in this register; this information is stored in a shadow register. To
latch the new VS3 voltage setting into the state machine, the user must set the voltage reference
GO bit (Register 0x7F[0]). After that, the voltage changes with a limited slew rate (programmed in
Register 0x5F[2:0]).
Bit 5
0
1
0
1
Bit 3
0
0
1
1
0
0
1
1
ADC Full-Scale
Range (%)
−2
−1
−0.5
0
Bit 2
0
1
0
1
0
1
0
1
Rev. B | Page 60 of 92
Voltage Difference from CS2+ to CS2− (mV)
−3
−6
−9
−12
−15
−18
−21
−24
V
−384
−192
−96
0
OUT
= 12 V (mV)
Voltage Difference from VS1 to VS2
V
−1504
−752
−376
0
OUT
= 48 V (mV)
Data Sheet