ICE3DS01LG Infineon Technologies, ICE3DS01LG Datasheet - Page 9

• Manufacturer Part Number: ICE3DS01LG
• Description: IC OFFLINE CTRLR SMPS CM DSO8
• Manufacturer: Infineon Technologies
• Series: CoolSET®F3r

Specifications of ICE3DS01LG

• Output Isolation: Isolated
• Frequency Range: 98 ~ 119kHz
• Voltage - Input: 8.5 ~ 22 V
• Voltage - Output: 500V
• Power (watts): 450mW
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• For Use With: EVALSF3-ICE3DS01G-60WIN - BOARD DEMO ICE3DS01G 60W SO-8EVALSF3-ICE3DS01IN - BOARD DEMO ICE3DS01 60W 8-DIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ICE3DS01LGXT; SP000014264

let T1 discharging the soft-start capacitor C
Thus it is ensured that at every startup cycle the voltage ramp
at pin SoftS starts at zero.
The internal Voltage Reference is switched off if Latched
Off Mode or Auto Restart Mode is entered. The current
consumption is then reduced to 300µA.
When Active Burst Mode is entered the internal Bias is
switched off in order to reduce the current consumption
below 1.1mA while keeping the Voltage Reference still
active as this is necessary in this mode.
In case Latched Off Mode is entered VCC needs to be
lowered below 6V to reset the Latched Off Mode. This is
done usually by disconnecting the SMPS from the AC line.
3.3
Figure 5
During the Startup Phase a Soft Start is provided. A signal
V
combination with the internal pull up resistor R
determines the duty cycle until V
In the beginning C
1V by T2. Therefore the Soft Start Phase takes place between
1V and 4V. Above V
limitation DC
comparator C2 blocks the gate G7 (see Figure 6).The
Version 2.1
SoftS
SoftS
C
which is generated by the external capacitor C
SoftS
Startup Phase
4V
0.85V
max
Soft Start
Soft Start
SoftS
R
is controlled by comparator C7 as
SoftS
SoftsS
is immediately charged up to approx.
3.25kΩ
C7
C2
PWM OP
= 4V there is no longer duty cycle
T2
Comparator
Soft-Start
SoftS
x3.7
G7
exceeds 4V.
&
T3
SoftS
Gate Driver
at pin SoftS.
1V
6.5V
CS
Softs
SoftS
in
9
maximum charge current in the very first phase when V
is below 1V is limited to 1.9mA.
Figure 6
By means of this extra charge stage there is no delay in the
beginning of the Startup Phase when there is still no
switching. Furthermore Soft Start is finished at 4V to have
faster the maximum power capability. The duty cycles DC
and DC
inductance of the transformer. The limitation of the primary
current by DC
to a maximum primary current which is limited by the
internal Current Limiting with CS = 1V. Therefore the
maximum Startup Phase is divided into a Soft Start Phase
until t1 and a phase from t1 until t2 where maximum power
is provided if demanded by the FB signal.
DC
5.4V
4V
1V
V
DC
DC
SoftS
max
1
2
2
max. Soft Start Phase
are depending on the mains and the primary
2
Startup Phase
is related to V
max. Startup Phase
Functional Description
t1
SoftS
= 4V. But DC
ICE3DS01L/LG
15 Nov 2005
1
is related
t2
F3
SoftS
t
t
1