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UC2845ADM Fiches technique(PDF) 3 Page - Microsemi Corporation

No de pièce UC2845ADM
Description  CURRENT MODE PWM CONTROLLER
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Fabricant  MICROSEMI [Microsemi Corporation]
Site Internet  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

UC2845ADM Fiches technique(HTML) 3 Page - Microsemi Corporation

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C URRENT M ODE PWM C ONTROLLER
UC184xA/284xA/384xA
PRODUCT DA T ABOOK 1996/1997
3
Copyright © 1995
Rev. 1.2
12/95
P RODUCTION D AT A S HEET
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for UC384xA with 0°C
≤ T
A ≤ 70°C, UC284xA with -40°C ≤ TA ≤ 85°C,
UC184xA with -55°C
≤ T
A ≤ 125°C; VCC=15V; RT=10K; C T=3.3nF.
Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal
to the ambient temperature.)
Reference Section
Parameter
Symbol
Test Conditions
Output Voltage
V
REF
T
J = 25°C, IL = 1mA
Line Regulation
12
≤ V
IN ≤ 25V
Load Regulation
1
≤ I
O ≤ 20mA
Temperature Stability (Note 2 & 7)
Total Output Variation
Over Line, Load, and Temperature
Output Noise Voltage (Note 2)
V
N
10Hz
≤ f ≤ 10kHz, T
J = 25°C
Long Term Stability (Note 2)
T
A = 125°C, t = 1000hrs
Output Short Circuit Current
I
SC
UC384xA
Units
Min. Typ. Max. Min. Typ. Max.
UC184xA/284xA
4.95 5.00 5.05 4.90 5.00 5.10
V
620
6
20
mV
625
6
25
mV
0.2
0.4
0.2
0.4
mV/°C
4.9
5.1
4.82
5.18
V
50
50
µV
525
5
25
mV
-30
-100 -180
-30
-100 -180
mA
Oscillator Section
Initial Accuracy (Note 6)
T
J = 25°C
Voltage Stability
12
≤ V
CC ≤ 25V
Temperature Stability (Note 2)
T
MIN ≤ TA ≤ TMAX
Amplitude (Note 2)
Discharge Current
T
J = 25°C, VPIN 4 = 2V
V
PIN 4 = 2V, TMIN ≤ TA ≤ TMAX
47
52
57
47
52
57
kHz
0.2
1
0.2
1
%
55
%
1.7
1.7
V
7.8
8.3
8.8
7.8
8.3
8.8
mA
7.5
8.8
7.6
8.8
mA
Output Low Level
V
OL
I
SINK = 20mA
I
SINK = 200mA
Output High Level
V
OH
I
SOURCE = 20mA
I
SOURCE = 200mA
Rise Time (Note 2)
T
R
T
J = 25°C, CL = 1nF
Fall Time (Note 2)
T
F
T
J = 25°C, CL = 1nF
UVLO Saturation
V
SAT
V
CC = 5V, ISINK = 10mA
Current Sense Section
Gain (Note 3 & 4)
A
VOL
Maximum Input Signal (Note 3)
V
PIN 1 = 5V
Power Supply Rejection Ratio (Note 3)
PSRR
12
≤ V
CC ≤ 25V
Input Bias Current
I
B
Delay to Output (Note 2)
T
pd
V
PIN 3 = 0 to 2V
Output Section
2.85
3
3.15 2.85
3
3.15
V/V
0.9
1
1.1
0.9
1
1.1
V
70
70
dB
-2
-10
-2
-10
µA
150
300
150
300
ns
0.1
0.4
0.1
0.4
V
1.5
2.2
1.5
2.2
V
13
13.5
13
13.5
V
12
13.5
12
13.5
V
50
150
50
150
ns
50
150
50
150
ns
0.7
1.2
0.7
1.2
V
(Electrical Characteristics continue next page.)
Error Amp Section
Input Voltage
V
PIN 1 = 2.5V
Input Bias Current
I
B
Open Loop Gain
A
VOL
2
≤ V
O ≤ 4V
Unity Gain Bandwidth (Note 2)
UGBW
T
j = 25°C
Power Supply Rejection Ratio (Note 3)
PSRR
12
≤ V
CC ≤ 25V
Output Sink Current
I
OL
V
PIN 2 = 2.7V, VPIN 1 = 1.1V
Output Source Current
I
OH
V
PIN 2 = 2.3V, VPIN 1 = 5V
Output Voltage High Level
V
OH
V
PIN 2 = 2.3V, RL = 15K to ground
Output Voltage Low Level
V
OL
V
PIN 2 = 2.7V, RL = 15K to VREF
2.45 2.50 2.55 2.42 2.50 2.58
V
-0.3
-1
-0.3
-2
µA
65
90
65
90
dB
0.7
1
0.7
1
MHz
60
70
60
70
dB
26
26
mA
-0.5
-0.8
-0.5
-0.8
mA
56
56
V
0.7
1.1
0.7
1.1
V


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