L6668 STMicroelectronics, L6668 Datasheet - Page 20

• Manufacturer Part Number: L6668
• Description: IC CTRLR PWM PROG CM HV 16SOIC
• Manufacturer: STMicroelectronics

Specifications of L6668

• Output Isolation: Isolated
• Frequency Range: 93 ~ 107kHz
• Voltage - Input: 9.4 ~ 22 V
• Power (watts): 750mW
• Operating Temperature: -25°C ~ 150°C
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Number Of Outputs: 1
• Duty Cycle (max): 75 %
• Output Current: 800 mA
• Mounting Style: SMD/SMT
• Switching Frequency: 105 KHz
• Maximum Operating Temperature: + 150 C
• Fall Time: 30 ns
• Minimum Operating Temperature: - 25 C
• Rise Time: 55 ns
• Synchronous Pin: No
• Topology: Flyback
• Load-dependent Current-mode Control: FIXED-FREQUENCY (HEAVY LOAD), FREQUENCY FOLDBACK (LIGHT LOAD), BURST-MODE (NO-LOAD)
• For Use With: 497-6389 - BOARD EVAL USING L6668 & STSR30497-5499 - EVAL BOARD FOR L6668
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L6668
Figure 46. Typical Application: 80W, WRM flyback; Electrical Schematic
Table 6. Light load measurements on the circuit of figure 46
20/23
100 nF
100 nF
C4
C4
J1
J1
88 to 264
88 to 264
F1 T2A250V
F1 T2A250V
Vac
Vac
Output power
6.2 kΩ
6.2 kΩ
4.03 kΩ
4.03 kΩ
3.3 nF
3.3 nF
Pout = 0.5 W
R9
R9
Pout = 0 W
C5
C5
R8
R8
C3 100 nF
C3 100 nF
STBY
STBY
RCT
RCT
NTC1
NTC1
VREF
VREF
16
16
N.C.
N.C.
13
13
82.5 kΩ
82.5 kΩ
R10
R10
8
8
6
6
R5 47kΩ
R5 47kΩ
S-COMP
S-COMP
SKIPADJ
SKIPADJ
15
15
100 µF
100 µF
DF04M
DF04M
400 V
400 V
BD1
BD1
C1
C1
9
9
L6668
L6668
47 kΩ
47 kΩ
R11
R11
56 nF
56 nF
7
7
C6
C6
DIS
DIS
330 kΩ
330 kΩ
R4
R4
11
11
SS
SS
5
5
VCC
VCC
10
10
COMP
COMP
1
1
2.2 nF
2.2 nF
HV
HV
C7
C7
12
12
4
4
3
3
Test condition
GND
GND
Vin= 110 Vac
9.1 kΩ
9.1 kΩ
Vin= 230 Vac
Vin= 110 Vac
Vin= 230 Vac
PC817A
PC817A
R6
R6
OC1
OC1
OUT
OUT
ISEN
ISEN
47 µF
47 µF
25 V
25 V
C2
C2
R1
R1
3 MΩ
3 MΩ
3 MΩ
3 MΩ
R12 1kΩ
R12 1kΩ
R710Ω
R710Ω
R2
R2
R3 10Ω
R3 10Ω
T1: CORE E32/16/9, N67
T1: CORE E32/16/9, N67
PRIM. IND. 430µH; lgap = 1mm
PRIM. IND. 430µH; lgap = 1mm
D3 1N4148
D3 1N4148
STTH1L06
STTH1L06
1.5KE200
1.5KE200
D1
D1
R13A,B
R13A,B
D2
D2
0.56
0.56
1/2W
1/2W
STP9NK65
STP9NK65
N1
N1
56T
56T
Q1
Q1
N3
N3
8T
8T
T1
T1
TL431
TL431
PC817A
PC817A
4.3 kΩ
4.3 kΩ
OC1
OC1
STPS20150CT
STPS20150CT
R14
R14
N2
N2
10T
10T
2.2 nF
2.2 nF
C12
C12
Y1
Y1
2
2
D4
D4
1
1
Input power
3
3
C8A,B,C
C8A,B,C
0.71 W
0.86 W
0.09 W
0.17 W
680 µF
680 µF
25 V
25 V
1.2 kΩ
1.2 kΩ
R15
R15
1.3 kΩ
1.3 kΩ
47 kΩ
47 kΩ
100 nF
100 nF
R18
R18
C10
C10
R16
R16
100 nF
100 nF
C9
C9
8.06 kΩ
8.06 kΩ
R17
R17
18V/4.5A
18V/4.5A
GND
GND
J2
J2