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UC2842A View Datasheet(PDF) - Motorola => Freescale

Part NameDescriptionManufacturer
UC2842A HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER Motorola
Motorola => Freescale Motorola
UC2842A Datasheet PDF : 14 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
UC3842A, 43A UC2842A, 43A
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Total Power Supply and Zener Current
Output Current, Source or Sink (Note 1)
Output Energy (Capacitive Load per Cycle)
(ICC + IZ)
IO
W
30
mA
1.0
A
5.0
µJ
Current Sense and Voltage Feedback Inputs
Error Amp Output Sink Current
Power Dissipation and Thermal Characteristics
D Suffix, Plastic Package
Maximum Power Dissipation @ TA = 25°C
Thermal Resistance, Junction–to–Air
N Suffix, Plastic Package
Maximum Power Dissipation @ TA = 25°C
Thermal Resistance, Junction–to–Air
Operating Junction Temperature
Operating Ambient Temperature
UC3842A, UC3843A
UC2842A, UC2843A
Vin
– 0.3 to + 5.5 V
IO
10
mA
PD
RθJA
PD
RθJA
TJ
TA
862
mW
145
°C/W
1.25
100
+ 150
0 to + 70
– 25 to + 85
W
°C/W
°C
°C
Storage Temperature Range
Tstg
– 65 to + 150 °C
ELECTRICAL CHARACTERISTICS (VCC = 15 V, [Note 2], RT = 10 k, CT = 3.3 nF, TA = Tlow to Thigh [Note 3],
unless otherwise noted.)
UC284XA
UC384XA
Characteristics
Symbol Min
Typ
Max
Min
Typ
Max
REFERENCE SECTION
Reference Output Voltage (IO = 1.0 mA, TJ = 25°C)
Vref
4.95
5.0
5.05
4.9
5.0
Line Regulation (VCC = 12 V to 25 V)
Regline
2.0
20
2.0
Load Regulation (IO = 1.0 mA to 20 mA)
Regload
3.0
25
3.0
Temperature Stability
TS
0.2
0.2
Total Output Variation over Line, Load, Temperature
Vref
4.9
5.1
4.82
Output Noise Voltage (f = 10 Hz to 10 kHz, TJ = 25°C)
Vn
50
50
Long Term Stability (TA = 125°C for 1000 Hours)
S
5.0
5.0
Output Short Circuit Current
ISC
– 30 – 85 – 180 – 30 – 85
OSCILLATOR SECTION
Frequency
TJ = 25°C
TA = Tlow to Thigh
fosc
47
52
57
47
52
46
60
46
Frequency Change with Voltage (VCC = 12 V to 25 V) fosc/V
0.2
1.0
0.2
Frequency Change with Temperature
TA = Tlow to Thigh
fosc/T
5.0
5.0
Oscillator Voltage Swing (Peak–to–Peak)
Vosc
1.6
1.6
Discharge Current (Vosc = 2.0 V)
TJ = 25°C
TA = Tlow to Thigh
Idischg
7.5
8.4
9.3
7.5
8.4
7.2
9.5
7.2
NOTES: 1. Maximum Package power dissipation limits must be observed.
2. Adjust VCC above the Startup threshold before setting to 15 V.
3. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible
Tlow = –20°C for UC3842A, UC3843A
Tlow = –25°C for UC2842A, UC2843A
Thigh = +70°C for UC3842A, UC3843A
Thigh = +85°C for UC2842A, UC2843A
5.1
20
25
5.18
– 180
57
60
1.0
9.3
9.5
Unit
V
mV
mV
mV/°C
V
µV
mV
mA
kHz
%
%
V
mA
2
MOTOROLA ANALOG IC DEVICE DATA
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