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6.6.3
User defined protection by external protection enable pin
Although there are lots of pre-defined Auto Restart Protection is implemented in the IC, customer still can
have some tailor-made protection for the application needs by pulling down the BA pin to lower 0.33V. When
BA pin lower than 0.33V, the gate drive switching will be stopped and IC will enter to auto restart mode until
the external auto restart enable signal released.
Figure 18
User defined Auto Restart Protection circuit
7
Input power curve
The purpose of the input power curve is to simplify the selection of the CoolSET
function of ambient temperature to the input power of the system in which the input filter loss, bridge rectifier
loss and the MOSFET power loss are considered. The only information needed is the required output power,
the input voltage range, the operating ambient temperature and the efficiency of the system. The required
input power can then be calculated as equation (10).
P
P =
o
η
in
where P
: input power, P
in
It then simply looks up the closed input power at the required ambient temperature from the input power
curve.
The input power curves for the CoolSET-F3R (DIP-8 & DIP-7) family are listed below.
60
54
48
42
36
30
24
18
12
6
0
0
10
20
30
40
50
Ambient Temperature [°C]
ICE3BR0665J : Vin=85Vac~265Vac
Figure 19
Input power curve for ICE3BR0665J
Application Note
: output power, η : efficiency
o
60
70
80
90
100 110 120 130
100
90
80
70
60
50
40
30
20
10
0
0
10
20
30
40
Ambient Temperature [°C]
ICE3BR0665J : Vin=230Vac±15%
17
ICE3BRXX65J(Z)(G)
®
device. The curve is a
50
60
70
80
90
100 110 120 130
2010-06-20
(10)
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