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UC2842A Datasheet(PDF) 2 Page - Texas Instruments

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Part No. UC2842A
Description  Current Mode PWM Controller
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

UC2842A Datasheet(HTML) 2 Page - Texas Instruments

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PACKAGE PIN FUNCTION
FUNCTION
PIN
N/C
1
Comp
2
N/C
3-4
VFB
5
N/C
6
ISENSE
7
N/C
8-9
RT/CT
10
N/C
11
Pwr Gnd
12
Gnd
13
N/C
14
Output
15
N/C
16
VC
17
VCC
18
N/C
19
VREF
20
DIL-8, SOIC-8 (TOP VIEW)
J or N, D8 Package
CONNECTION DIAGRAMS
ELECTRICAL CHARACTERISTICS Unless otherwise stated, these specifications apply for -55
°C ≤ TA ≤ 125°C for the
UC184xA; -40
°C ≤ TA ≤ 85°C for the UC284xA; 0 ≤ TA ≤ 70°C for the UC384xA; VCC = 15V (Note 5); RT = 10k; CT = 3.3nF; TA = TJ; Pin
numbers refer to DIL-8.
PARAMETER
TEST CONDITIONS
UC184xA\UC284xA
UC384xA
UNITS
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
Reference Section
Output Voltage
TJ = 25°C, IO = 1mA
4.95
5.00
5.05
4.90
5.00
5.10
V
Line Regulation
12
≤≤ VIN ≤≤ 25V
6
20
6
20
mV
Load Regulation
1
≤≤ IO ≤≤ 20mA
6
25
6
25
mV
Temp. Stability
(Note 2, Note 7)
0.2
0.4
0.2
0.4
mV/°C
Total Output Variation
Line, Load, Temp.
4.9
5.1
4.82
5.18
V
Output Noise Voltage
10Hz
≤≤ f ≤≤ 10kHz
TJ = 25°C (Note 2)
50
50
µV
Long Term Stability
TA = 125°C, 1000Hrs. (Note 2)
525
5
25
mV
Output Short Circuit
-30
-100
-180
-30
-100
-180
mA
Oscillator Section
Initial Accuracy
TJ = 25°C (Note 6)
47
52
57
47
52
57
kHz
Voltage Stability
12
≤≤ VCC ≤≤ 25V
0.2
1
0.2
1
%
Temp. Stability
TMIN
≤≤ TA ≤≤ TMAX (Note 2)
5
5
%
Amplitude
VPIN 4 peak to peak (Note 2)
1.7
1.7
V
Discharge Current
TJ = 25°C, VPIN 4 = 2V (Note 8)
7.8
8.3
8.8
7.8
8.3
8.8
mA
VPIN 4 = 2V (Note 8)
7.5
8.8
7.6
8.8
mA
ABSOLUTE MAXIMUM RATINGS (Note 1)
Note 1. All voltages are with respect to Ground, Pin 5. Currents
are positive into, negative out of the specified terminal. Consult
Packaging Section of Databook for thermal limitations and con-
siderations of packages. Pin numbers refer to DIL package only.
PLCC-20, LCC-20
(TOP VIEW)
Q, L Packages
UC1842A/3A/4A/5A
UC2842A/3A/4A/5A
UC3842A/3A/4A/5A
Supply Voltage (Low Impedance Source) . . . . . . . . . . . . . . 30V
Supply Voltage (ICC mA). . . . . . . . . . . . . . . . . . . . . Self Limiting
Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±1A
Output Energy (Capacitive Load) . . . . . . . . . . . . . . . . . . . . . 5
µJ
Analog Inputs (Pins 2, 3) . . . . . . . . . . . . . . . . . . -0.3V to +6.3V
Error Amp Output Sink Current . . . . . . . . . . . . . . . . . . . . 10mA
Power Dissipation at TA
≤ 25°C (DIL-8) . . . . . . . . . . . . . . . . 1W
Storage Temperature Range . . . . . . . . . . . . . -65°C to +150°C
Lead Temperature (Soldering, 10 Seconds) . . . . . . . . . . 300°C
SOIC-14 (TOP VIEW)
D Package
2


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