EVALSTSR30-60W STMicroelectronics, EVALSTSR30-60W Datasheet - Page 18

• Manufacturer Part Number: EVALSTSR30-60W
• Description: BOARD EVAL USING L6668 & STSR30
• Manufacturer: STMicroelectronics
• Type: AC/DC Switching Convertersr

Specifications of EVALSTSR30-60W

• Mfg Application Notes: EVALSTSR30-60W AppNote
• Main Purpose: AC/DC, Primary and Secondary Side
• Outputs And Type: 1, Isolated
• Power - Output: 60W
• Voltage - Output: 12V
• Current - Output: 5A
• Voltage - Input: 88 ~ 264VAC
• Regulator Topology: Flyback
• Frequency - Switching: 68kHz
• Board Type: Fully Populated
• Utilized Ic / Part: L6668, STSR30
• Input Voltage: 88 V to 264 V
• Output Voltage: 12 V
• Dimensions: 120 mm x 75 mm
• Product: Power Management Modules
• Silicon Manufacturer: ST Micro
• Silicon Core Number: L6668 And STSR30
• Kit Application Type: Power Management - Voltage Regulator
• Application Sub Type: SMPS
• Kit Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: L6668, STSR30
• Other names: 497-6389; EVALSTSR30-60W

L6668
Figure 43 shows a timing diagram where the PFC_STOP function operation is illustrated under different
operating conditions.
Figure 42. How the L6668 can switch off a PFC controller at light load
Figure 43. Operation of PFC_STOP function
Figure 44. Operation after DIS pin activation: timing diagram
18/23
Vcc
Vcc
PFC_STOP
Vcc
Vcc
ON
ON
Vcc
Vcc
V
V
Vcc
Vcc
OUT
OUT
HVstart
HVstart
Vcc
Vcc
DIS
DIS
-0.5
-0.5
Vin
Vin
2.2V
2.2V
OFF
OFF
COMP
rest
rest
ON
ON
Vcc
Drive
Gate
OUT
PFC
Vcc
Vcc
OFF
L6668
L6668
ON
Vcc
Vcc
16
16
Start-up
14
14
PFC_STOP
PFC_STOP
HV generator is turned on
HV generator is turned on
Full-load
10 k Ω
10 k Ω
2.2 k Ω
2.2 k Ω
BC557
BC557
2.2V
Input source is removed here
Input source is removed here
8.2 V
8.2 V
Light-load
HV generator is disabled here
HV generator is disabled here
2.7V
Disable latch is reset here
Disable latch is reset here
controller
controller
Vcc
Vcc
PFC
PFC
Full-load
t
t
t
t
t
t
t
t
t
t
t
t
t