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
REFERENCE VOLTAGE
VREF Output voltage
VREF Total variation
IREF Short circuit current
Sink capability in UVLO
PWM CONTROL
VCOMPH Maximum level
ICOMP Max. source current
RCOMP Dynamic resistance
Dmax Maximum duty cycle
Dmin Minimum duty cycle
CURRENT SENSE COMPARATOR
IISEN Input Bias Current
tLEB Leading Edge Blanking
td(H-L) Delay to Output
Gain
VISENx Maximum signal
VISENdis Hiccup-mode OCP level
STANDBY FUNCTION
Vdrop VCOMP - VSTBY
Vth
Threshold on VCOMP
Hysteresis
LATCHED DISABLE FUNCTION
IDIS Input Bias Current
Vth Disable threshold
OSCILLATOR
fsw Oscillation Frequency
Vpk Oscillator peak voltage
Vvy Oscillator valley voltage
SLOPE COMPENSATION
S-COMPpk Ramp peak
S-COMPvy Ramp starting value
Ramp voltage
Source capability
SOFT-START
ISSC Charge current
Test Condition
Min. Typ.
(2) Tj = 25 °C; IREF = 1 mA
Vcc= 9.4 to 22 V,
IREF = 1 to 5 mA
VREF = 0
Vcc = 6V; Isink = 0.5 mA
4.925 5
4.8
10
0.2
ICOMP =0
VCOMP = 1 V
VCOMP = 2 to 4 V
VCOMP = 5 V
VCOMP = 1 V
VISEN = 0
After gate drive low-to-high
transition
5.5
320 400
22
70
160 225
VCOMP = 5 V
(2)
3.56 3.75
0.725 0.8
1.35 1.5
ISTBY = 0.8 mA, VCOMP<3V
(2) Voltage falling
35
3
50
VDIS = 0 to Vth
(2) voltage rising
2.1
2.2
Tj = 25°C, VCOMP = 5 V
Vcc = 9.4 to 22V, VCOMP = 5 V
(2)
(2)
95
100
93
100
2.85
3
0.8 0.95
RS-COMP = 3 kΩ to GND,
OUT pin high, VCOMP = 5V
RS-COMP = 3 kΩ to GND,
OUT pin high
OUT pin low
VS-COMP = VS-COMPpk
1.6 1.75
0.15 0.35
0
0.8
Tj = 25 °C
14
20
Max.
5.075
5.13
30
0.5
480
75
0
-1
290
100
3.94
0.875
1.65
-1
2.3
105
107
3.15
1.1
1.9
0.55
26
Unit
V
V
mA
V
V
µA
kΩ
%
%
µA
ns
ns
V/V
V
V
mV
V
mV
µA
V
kHz
kHz
V
V
V
V
mA
µA
5/23
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