EVALSF3-ICE3B2565 Infineon Technologies, EVALSF3-ICE3B2565 Datasheet - Page 8

• Manufacturer Part Number: EVALSF3-ICE3B2565
• Description: BOARD DEMO ICE3B2565 30.4W SMPS
• Manufacturer: Infineon Technologies
• Series: CoolSET®F3r

Specifications of EVALSF3-ICE3B2565

• Main Purpose: AC/DC, Primary Side
• Outputs And Type: 1, Isolated
• Power - Output: 30.4W
• Voltage - Output: 16V
• Current - Output: 1.9A
• Voltage - Input: 85 ~ 265VAC
• Regulator Topology: Flyback
• Frequency - Switching: 67kHz
• Board Type: Fully Populated
• Utilized Ic / Part: ICE3B2565
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: EVALSF3-ICE3B2565IN

external Soft Start capacitor if a low load condition is detected when VFB is falling below 1.32V. Only after
V
4.8
At light load condition, the SMPS enters into Active Burst Mode. The controller is always active at this state.
V
fast response on load jump, efficiency also increased significantly during Active Burst Mode. When the
voltage level at FB falls below 1.32V, capacitor C8 at SOFTST pin is allowed to charge starting from the
clamped voltage level at 4.4V in Normal Operating Mode. Active Burst Mode is entered if V
5.4V. A Blanking Window as mentioned earlier which can be adjusted by manipulating C8 is generated to
avoid a sudden entering of Burst Mode due to load jump.
During Active Burst Mode the current sense voltage limit at I
conduction losses. All the internal circuits are switched off except the reference and bias voltages to reduce
the total V
and 4V. To leave Burst Mode, FB voltage must exceed 4.8V. This resets the Active Burst Mode and turns
the SMPS into Normal Operating Mode. Maximum current can now be provided to stabilize V
Application Note
SOFTS
CC
must therefore be above the switch off threshold V
has exceeded 5.4V and Vfb is still below 1.32V, Active Burst Mode is entered.
CC
Active Burst Mode
current consumption to below 1.1mA. The FB voltage is changing like a sawtooth between 3.4
8
CCoff
= 8.5V. While supporting low ripple on V
SENSE
pin, V
ISENSE
, is set to 0.257V to reduce the
OUT
SOFTST
ICE3B2565
.
2005-01-13
exceeds
OUT
and