ICE1CS02 Infineon Technologies, ICE1CS02 Datasheet - Page 9

• Manufacturer Part Number: ICE1CS02
• Description: IC PFC CTRLR AVERAGE CURR 16DIP
• Manufacturer: Infineon Technologies

Specifications of ICE1CS02

• Mode: Average Current
• Frequency - Switching: 65kHz
• Current - Startup: 1.3mA
• Voltage - Supply: 11 V ~ 25 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: SP000444084

3
All values which are used in the functional description
are typical values. For calculating the worst cases the
min/max values which can be found in section 4
Electrical Characteristics have to be considered.
3.1
The ICE1CS02 comprises the complete control for
power factor controlled switched mode power sup-
plies. With its PFC and PWM section being internally
synchronized, applies for off-line converters with input
voltages ranging from 90 V to 270 V.
The topology of the PFC preconverter is boost.
The minimal line current gaps for the maximum duty
cycle of the PFC is about 95%. The selectable maxi-
mum duty of the PWM, however, is limited to 47% or
60% to prevent transformer saturation.
The external RC-filter in the feedback line after the
optocoupler is integrated into the IC in order to reduce
the external component count.
The Soft-Start function is integrated into the IC.
An internal precise peak current control is integrated
into the IC. With this function, the costs of the power
transformer and the secondary rectifier diode can be
reduced and the max power can also be limited. The
maximum power is almost independent from the input
voltage. Hence, it can avoid to over-size the critical
components of the SMPS such as the power
transformer or the secondary rectifier diode.
3.2
Figure 3
Version 1.0
Power Management
Power-Down
Internal Bias
Soft start
Reset
Functional Description
Introduction
Power Management
Power Management
Undervoltage Lockout
Reference
Voltage
11V
12V
VCC
5V
9
The Undervoltage Lockout monitors the external
supply voltage V
threshold V
switched on. A hysteresis sequence is implemented to
avoid the uncontrolled rings during switch-on. The
switch-off of the controller will take place when V
falls below 11V. The maximum current consumption
before the controller is activated is around 1.3mA.
When V
the internal bias circuit is switched off .
3.3
Figure 4
The clock rising edge will trigger a turn-off of PFC OUT
and falling edge will trigger a turn-on of PWM OUT.
PWM OUT
PFC OUT
CLK OUT
VCC
Internal Synchronization
Combi PFC/ PWM Controller
falls below the off-threshold; V
CCon
Internal Synchronisation between PFC
=12V, the internal bias circuit is
VCC
and PWM Out
. When the V
Functional Description
VCC
exceeds the on-
ICE1CS02
25 July 2008
CCoff
=11.0V,
VCC