ADM1041-EVAL Analog Devices Inc, ADM1041-EVAL Datasheet - Page 19

• Manufacturer Part Number: ADM1041-EVAL
• Description: BOARD EVALUATION ADM1041
• Manufacturer: Analog Devices Inc

Specifications of ADM1041-EVAL

• Main Purpose: AC/DC, Secondary Side
• Outputs And Type: 1, Non-Isolated
• Power - Output: 24W
• Voltage - Output: 12V
• Current - Output: 2A
• Voltage - Input: 85 ~ 132VAC
• Board Type: Fully Populated
• Utilized Ic / Part: ADM1041
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Frequency - Switching: -
• Regulator Topology: -
• Lead Free Status / Rohs Status: Not Compliant

THEORY OF OPERATION
POWER MANAGEMENT
This block contains V
power-on/reset function. It also provides precision references
for internal use and a buffered reference voltage, V
configured to an output pin, overloading, shorting to ground, or
shorting to V
During power-on, V
upper UVL threshold. Housekeeping functions in this block
include reference voltage monitors, V
ground fault detector.
The ground fault detector monitors ADM1041 ground with
respect to the remote sense pin V
DD
do not effect the internal references. See Figure 8.
REF
DD
V
GND
V
does not come up until V
V
REF
DD
S
undervoltage lockout circuitry and a
–
18
20
1
7
6.0V–6.5V
2.0V
4.0V
4.4V
S
−. If GND becomes positive
DD
0.2V
overvoltage, and a
BAND GAP
Figure 8. Block Diagram of Power Management Section
MAIN
gndok_dis
MONITOR
GROUND
DD
REF
exceeds the
POR
UVLLO
UVLHI
OVP
GNDOK
. If V
REFERENCE
AUXILIARY
REF
10µs–20µs
Rev. A | Page 19 of 64
is
with respect to V
is true only when all the following conditions are met: ground is
negative with respect to V
normally, V
GAIN TRIMMING AND CONFIGURATION
The various gain settings and configurations throughout the
ADM1041 are digitally set up via the SMBus after it has been
loaded onto its printed circuit board. There is no need for
external trim potentiometers. An initial adjustment process
should be carried out in a test system. Other adjustments such
as current sense and voltage calibration should be carried out in
the completed power supply.
S
R
S
R
Q
Q
Q
INTREFOK
REFERENCE
MONITOR
EXTREFOK
DD
> UVLHI, and V
S
− an on-chip signal, V
REFERENCE
INTERNAL
S
−, INTREF and EXTREF are operating
DD
RESET
V
V
< V
DD
1.25V
DD
2.5V
OK
OV
DD
DD
OVP threshold.
OK, goes false. V
ADM1041
DD
OK