AN-9717 Ver la hoja de datos (PDF) - Fairchild Semiconductor
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AN-9717 Datasheet PDF : 30 Pages
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www.fairchildsemi.com
4. Test Procedure
Before testing the board; DC voltage supply for VDD, AC voltage supply for line input,
and DC electric load for output should be connected to the board properly.
1. Supply VDD for the control chip first. It should be higher than 13V (refer to the
specification for VDD turn-on threshold voltage in Table 1).
Table 1.
Specification Excerpt from FAN9611/12 Datasheet
Symbol
Parameter
Supply
ISTARTUP
IDD
IDD_DYM
VON
Startup Supply Current
Operating Current
Dynamic Operating Current
UVLO Start Threshold, FAN9611
UVLO Start Threshold, FAN9612
VOFF
VHYS
UVLO Stop Threshold Voltage
UVLO Hysteresis, FAN9611
UVLO Hysteresis, FAN9612
Conditions
VDD = VON – 0.2V
Output Not Switching
fSW = 50kHz; CLOAD = 2nF
VDD Increasing
VDD Decreasing
VON – VOFF
Min. Typ. Max. Unit
80 110 µA
3.7 5.2 mA
4
6
mA
9.5 10.0 10.5 V
12.0 12.5 13.0 V
7.0 7.5 8.0
V
2.5
V
5.0
V
2. Connect the AC voltage (85~265VAC) to start the FAN9611/12 evaluation board.
Since FAN9611/12 has brownout protection, any input voltages lower than operation
range triggers the protection.
3. Change load current (0~1A) and check the operation.
© 2010 Fairchild Semiconductor Corporation
6
FEB279_FAN9611/12 • Rev. 0.0.2
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