ICE3AR1580VJZ Datasheet, PDF (25/43 Pages) Infineon Technologies AG – Of f -Line SMPS Cur rent Mode Cont rol ler wi th integrated 800V

CoolSET™ F3R80
ICE3AR1580VJZ
Functional Description
Non switch auto restart mode is similar to odd skip auto restart mode except the start up switching pulses are also
suppressed at the even number of the restart cycle. The detection of fault still remains at the even number of the
restart cycle. When the fault is removed, the IC will resume to normal operation at the even number of the restart
cycle (Figure 29).
VVCC
Fault
detected
No detect
Startup and detect
No detect
17V
10.5V
VCS
t
No switching
t
Figure 29: Non switch auto restart waveform
The main purpose of the odd skip auto restart is to extend the restart time such that the power loss during auto
restart protection can be reduced. This feature is particularly good for smaller Vcc capacitor where the restart time
is shorter.
The following table lists the possible system failures and the corresponding protection modes.
VCC Over voltage (1)
VCC Over voltage (2)
Over load
Open Loop
VCC Undervoltage
Short Optocoupler
Over temperature
Odd skip Auto Restart Mode
Odd skip Auto Restart Mode
Odd skip Auto Restart Mode
Odd skip Auto Restart Mode
Normal Auto Restart Mode
Normal Auto Restart Mode
Non switch Auto Restart Mode
3.7.3.1 Vcc OVP, OTP and Vcc under voltage
VCC
FBB
Thermal Shutdown
Tj >130°C
25.5V
C2
120μs blanking
time
Spike
Blanking
30μs
C1
20.5V
&
4.5V
C4
G1
softs_period
Control Unit
Auto Restart
Mode Reset
VVCC < 10.5V
Auto Restart
mode
Voltage
Reference
Figure 30: Vcc OVP and OTP
There are 2 types of Vcc over voltage protection; Vcc OVP (1) and Vcc OVP (2). The Vcc OVP (1) takes action
only during the soft start period. The Vcc OVP (2) takes the action in any conditions.
Vcc OVP (1) condition is when VVCC voltage is > 20.5V, VFBB voltage is > 4.5V and during soft start period, the IC
enters into odd skip Auto Restart Mode. This condition likely happens during start up at open loop fault (Figure 30).
Data Sheet
25
V2.0, 2014-01-20