L5991A(1999) Просмотр технического описания (PDF) - STMicroelectronics
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L5991A Datasheet PDF : 19 Pages
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L5991 - L5991A
ELECTRICAL CHARACTERISTICS (VCC = 15V; Tj = 0 to 105°C; RT = 13.3kΩ (*) CT = 1nF;
unless otherwise specified.)
Symbol
Parameter
REFERENCE SECTION
VREF
Output Voltage
Line Regulation
Load Regulation
TS
Temperature Stability
Total Variation
IOS
Short Circuit Current
Power Down/UVLO
OSCILLATOR SECTION
Initial Accuracy
Duty Cycle
Duty Cycle Accuracy
Oscillator Ramp Peak
Oscillator Ramp Valley
ERROR AMPLIFIER SECTION
Input Bias Current
VI
GOPL
Input Voltage
Open Loop Gain
SVR
Supply Voltage Rejection
VOL
Output Low Voltage
VOH
Output High Voltage
IO
Output Source Current
Output Sink Current
Unit Gain Bandwidth
SR
Slew Rate
PWM CURRENT SENSE SECTION
Ib
Input Bias Current
IS
Maximum Input Signal
Delay to Output
Gain
Vt
Fault Threshold Voltage
SOFT START SECTION
ISSC
ISSD
VSSSAT
SS Charge Current
SS Discharge Current
SS Saturation Voltage
VSSCLAMP SS Clamp Voltage
LEADING EDGE BLANKING
Internal Masking Time
OUTPUT SECTION
VOL
Output Low Voltage
VOH
Output High Voltage
VOUT CLAMP Output Clamp Voltage
Collector Leakage
(*) RT = RA//RB, RA = RB = 27kΩ, see Fig. 22.
Test Condition
Min. Typ. Max. Unit
Tj = 25°C; IO = 1mA
VCC = 12 to 20V; Tj = 25°C
IO = 1 to 10mA; Tj = 25°C
Line, Load, Temperature
Vref = 0V
VCC = 6V; Isink = 0.5mA
4.925 5.0 5.075 V
2.0
10
mV
2.0
10
mV
0.4
mV/°C
4.80 5.0 5.130 V
30
150 mA
0.2
0.5
V
pin 15 = Vref;
Tj = 25°C
95
100 105 kHz
Vcomp = 4.5V
pin 15 = Vref; VCC = 12 to 20V 93
Vcomp = 4.5V
100 107 kHz
pin 15 = Vref; VCC = 12 to 20V 46.5
50
53.5 kHz
Vcomp = 2V
pin 3 = 0,7V, pin 15 = VREF
0
%
pin 3 = 0.7V, pin 15 = OPEN
0
%
pin 3 = 3.2V, pin 15 = VREF
47
%
pin 3 = 3.2V, pin 15 = OPEN
93
%
pin 3 = 2.79V, pin 15 = OPEN
75
80
85
%
2.8
3.0
3.2
V
0.75 0.9 1.05
V
VFB to GND
VCOMP = VFB
VCOMP = 2 to 4V
VCC = 12 to 20V
Isink = 2mA
Isou rce = 0.5mA, VFB = 2.3V
VCOMP > 4V, VFB = 2.3V
VCOMP = 1.1V, VFB = 2.7V
0.2
3.0
µA
2.42 2.5 2.58
V
60
90
dB
85
dB
1.1
V
5
6
V
0.5
1.3
2.5
mA
2
6
mA
1.7
4
MHz
8
V/µs
Isen = 0
VCOMP = 5V
3
15
µA
0.92 1.0 1.08
V
70
100
ns
2.85
3
3.15 V/V
1.1
1.2
1.3
V
Tj = 25°C
VSS = 0.6V Tj = 25°C
DC = 0%
14
20
26
µA
5
10
15
µA
0.6
V
7
V
100
ns
IO = 250mA
IO = 20mA; VCC = 12V
IO = 200mA; VCC = 12V
IO = 5mA; VCC = 20V
VCC = 20V VC = 24V
1.0
V
10 10.5
V
9
10
V
13
V
2
20
µA
3/23
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