© 2012 Fairchild Semiconductor Corporation
7
FEBFAN9611_S01U300A • Rev. 0.0.1
4.
Test Procedure
Before applying power to the FEBFAN9611_S01U300A evaluation board; the DC bias
supply for V
DD
, AC voltage supply for line input, and DC electronic load for output
should be connected to the board as shown in Figure 5.
Table 2. Specification Excerpt from FAN9611 Datasheet
Symbol Parameter
Conditions
Min.
Typ.
Max. Unit
Supply
I
STARTUP
Startup Supply Current
V
DD
= V
ON
– 0.2V
80
110
µA
I
DD
Operating Current
Output Not Switching
3.7 5.2
mA
I
DD_DYM
Dynamic Operating Current
f
SW
= 50kHz; C
LOAD
= 2nF
4 6
mA
V
ON
UVLO Start Threshold
V
DD
Increasing
9.5 10.0 10.5 V
V
OFF
UVLO Stop Threshold Voltage V
DD
Decreasing
7.0 7.5 8.0 V
V
HYS
UVLO Hysteresis
V
ON
– V
OFF
2.5
V
4.1.
Safety Precautions
The FEBFAN9611_S01U300A evaluation module produces lethal voltages and the bulk
output capacitors store significant charge. Please be extra careful when probing and
handling the module and observe a few precautions:
Start with a clean working surface, clear of any conductive material.
Be careful while turning on the power switch to the AC source.
Never probe or move a probe on the DUT while the AC line voltage is present.
Ensure the output capacitors are discharged before disconnecting the test leads. One
way to do this is to remove the AC power with the DC output load still switched on.
The load then discharges the output capacitors and the module is safe to disconnect.
Power-On Procedure
1.
Supply V
DD
for the control chip first. It should be higher than 10.5V
(refer to the
specification for V
DD
turn-on threshold voltage in Table 2).
2.
Connect the AC voltage (90~265V
AC
) to start the FAN9611 evaluation board. Since
FAN9611 has brownout protection, any input voltage less than the designed
minimum AC line voltage triggers brownout protection. FEBFAN9611_S01U300A
does not start until the AC input voltage is greater than 90V
AC
.
3.
Change load current (0~0.75A) and check the operation
4.
Verify the output voltage is regulating between 395V
DC
<V
OUT
<405V
DC
