L6668 STMicroelectronics, L6668 Datasheet - Page 6

• 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
Table 5. Electrical Characteristcs (continued)
(T
(1), (2)
Figure 4. Typical System Block Diagram
6/23
SKIPADJ FUNCTION
PFC_STOP FUNCTION
GATE DRIVER
V
Symbol
I
j
V
V
sourcepk
SSclamp
V
I
= 0 to 105°C, Vcc=15V, Co=1nF; R
V
sinkpk
Oclamp
V
I
Hys
I
V
Vth
Vth
SSsat
bias
SKIP
leak
V
OFF
OH
t
t
OL
Parameters in tracking each other
r
f
L
Low saturation voltage
High saturation voltage
Input Bias Current
Operating range
Hysteresis
Shutdown threshold
High level leakage current
Low saturation level
Threshold for high level
Threshold for high level
Output Low Voltage
Output High voltage
Peak source current
Peak sink current
Current Fall Time
Current Rise Time
Output clamp voltage
UVLO saturation
PFC PRE-REGULATOR
PFC PRE-REGULATOR
V
V
inac
inac
Parameter
L6561/2
L6561/2
L6563
L6563
or
or
PWM is turned off in case of PFC's
PWM is turned off in case of PFC's
anomalous operation, for safety
anomalous operation, for safety
load to ease compliance with
load to ease compliance with
PFC can be turned off at light
PFC can be turned off at light
energy saving regulations.
energy saving regulations.
T
=13.3k , C
Duty cycle = 0
V
Below V
Voltage falling
V
I
V
V
I
I
I
Vcc= 0 to Vccon, I
PFC_STOP
sink
source
source
SKIP
PFC_STOP
COMP
COMP
= 200 mA
= 0 to 4.5 V
= 5 mA, Vcc = 12V
= 5mA; Vcc = 20V
falling
rising
SKIP
Test Condition
T
= 1mA, V
< 16V, V
=1nF; unless otherwise specified)
(2)
(2)
L6668
L6668
sink
COMP
COMP
= 2mA
DC-DC CONVERTER
DC-DC CONVERTER
= 2V
= 4V
Min.
2.55
-0.8
1.4
2.1
9.8
0.8
25
10
Typ.
10.3
2.2
2.7
30
55
12
7
V
V
outdc
outdc
Max.
2.85
0.6
2.5
0.8
0.1
2.3
1.0
1.1
85
15
-1
1
Unit
mV
µA
µA
ns
ns
V
V
V
V
V
V
V
V
V
A
A
V
V