L6668 STMicroelectronics, L6668 Datasheet - Page 9
L6668
Manufacturer Part Number
L6668
Description
IC CTRLR PWM PROG CM HV 16SOIC
Manufacturer
STMicroelectronics
Datasheet
1.L6668TR.pdf
(23 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
L6668TR
Manufacturer:
TOSHIBA
Quantity:
19 162
Part Number:
L6668TR
Manufacturer:
ST
Quantity:
20 000
Part Number:
L6668TR-1LF
Manufacturer:
ST
Quantity:
20 000
Figure 17. Oscillator frequency vs. Tj
Figure 18. Oscillator ramp vs. Tj
Figure 19. Current sense clamp vs. Tj
fsw
Vpin14
101.5%
100.5%
V
(V)
(V)
99.5%
ISENx
102%
101%
100%
99%
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.9
0.8
0.7
0.6
1
-50
-50
-50
(pin 12)
Values normalized to f
Valley
Peak
R
T
C
= 13.3 kΩ
T
= 1 nF
0
0
0
Tj (°C)
Tj (°C)
Tj (°C)
V
50
50
COMP
s w
50
@ Tj=25°C, Vcc=15V
Vcc = 15 V
= Upper clamp
Vcc = 22V
Vcc = 15 V
100
100
Vcc = 9.4V
100
Vcc = 15V
150
150
150
Figure 20. Disable level on current sense vs. Tj
Figure 21. Reference voltage vs. Tj
Figure 22. PFC_STOP open/low thresholds on
V
COMP
Vpin12
(V)
V
V
(V)
(V)
REF
COMP
2.0
1.8
1.6
1.4
1.2
1.0
vs. Tj
5.05
4.95
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
(pin 8)
-50
5.1
4.9
-50
(pin 10)
5
-50
PFC_STOP low (voltage rising)
PFC_STOP open (voltage falling)
0
0
0
Tj (°C)
Tj (°C)
Tj (°C)
50
50
50
Vcc = 15 V
Vcc = 15 V
Vcc = 15 V
100
100
100
150
150
150
L6668
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