L6668 Просмотр технического описания (PDF) - STMicroelectronics
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L6668 Datasheet PDF : 23 Pages
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L6668
Table 5. Electrical Characteristcs (continued)
(Tj = 0 to 105°C, Vcc=15V, Co=1nF; RT =13.3k , CT =1nF; unless otherwise specified)
Symbol
Parameter
VSSsat Low saturation voltage
VSSclamp High saturation voltage
SKIPADJ FUNCTION
Ibias
VSKIP
Hys
Input Bias Current
Operating range
Hysteresis
VOFF Shutdown threshold
PFC_STOP FUNCTION
Ileak High level leakage current
VL
Low saturation level
Vth Threshold for high level
Vth Threshold for high level
GATE DRIVER
VOL
VOH
Isourcepk
Isinkpk
tf
tr
VOclamp
Output Low Voltage
Output High voltage
Peak source current
Peak sink current
Current Fall Time
Current Rise Time
Output clamp voltage
UVLO saturation
(1), (2) Parameters in tracking each other
Test Condition
Duty cycle = 0
VSKIP = 0 to 4.5 V
Below VSKIP
Voltage falling
VPFC_STOP < 16V, VCOMP = 2V
IPFC_STOP = 1mA, VCOMP = 4V
VCOMP falling (2)
VCOMP rising (2)
Isink = 200 mA
Isource = 5 mA, Vcc = 12V
Isource = 5mA; Vcc = 20V
Vcc= 0 to Vccon, Isink= 2mA
Min. Typ.
7
1.4
25
2.1
2.2
2.55 2.7
9.8 10.3
-0.8
0.8
30
55
10
12
Max.
0.6
-1
2.5
85
0.8
1
0.1
2.3
2.85
1.0
15
1.1
Unit
V
V
µA
V
mV
V
µA
V
V
V
V
V
A
A
ns
ns
V
V
Figure 4. Typical System Block Diagram
PFC PRE-REGULATOR
DC-DC CONVERTER
Vinac
Voutdc
6/23
PWM is turned off in case of PFC's
anomalous operation, for safety
L6561/2
or
L6563
L6668
PFC can be turned off at light
load to ease compliance with
energy saving regulations.
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