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UC2842BD View Datasheet(PDF) - Motorola => Freescale

Part Name
Description
Manufacturer
UC2842BD
Motorola
Motorola => Freescale Motorola
UC2842BD Datasheet PDF : 16 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
UC3842B, 43B UC2842B, 43B
ELECTRICAL CHARACTERISTICS (VCC = 15 V [Note 2], RT = 10 k, CT = 3.3 nF, for typical values TA = 25°C, for min/max values TA
is the operating ambient temperature range that applies [Note 3], unless otherwise noted.)
UC284XB
UC384XB, BV
Characteristics
Symbol
Min
Typ Max Min
Typ Max Unit
PWM SECTION
Duty Cycle
Maximum (UC284XB, UC384XB)
Maximum (UC384XBV)
Minimum
TOTAL DEVICE
Power Supply Current
Startup (VCC = 6.5 V for UCX843B,
Startup (VCC 14 V for UCX842B, BV)
Operating (Note 2)
%
DC(max)
94
96
94
96
93
96
DC(min)
0
0
ICC + IC
mA
0.3
0.5
0.3
0.5
12
17
12
17
Power Supply Zener Voltage (ICC = 25 mA)
VZ
30
36
30
36
V
NOTES: 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 = 0°C for UC3842B, UC3843B
Tlow = –25°C for UC2842B, UC2843B
Tlow = –40°C for UC3842BV, UC3843BV
Thigh = +70°C for UC3842B, UC3843B
Thigh = +85°C for UC2842B, UC2843B
Thigh = +105°C for UC3842BV, UC3843BV
Figure 1. Timing Resistor
versus Oscillator Frequency
80
50
20
8.0
5.0
2.0 VCC = 15 V
TA = 25°C
0.8
10 k
20 k
50 k 100 k 200 k
500 k
fOSC, OSCILLATOR FREQUENCY (kHz)
1.0 M
Figure 3. Oscillator Discharge Current
versus Temperature
9.0
VCC = 15 V
VOSC = 2.0 V
8.5
8.0
7.5
7.0
– 55 – 25 0
25
50
75 100 125
TA, AMBIENT TEMPERATURE (°C)
Figure 2. Output Deadtime
versus Oscillator Frequency
100
1. CT = 10 nF
50 2. CT = 5.0 nF
3. CT = 2.0 nF
4. CT = 1.0 nF
20 5. CT = 500 pF
6. CT = 200 pF
10 7. CT = 100 pF
5.0
4
3
2
1
7
6
5
2.0
1.0
10 k
VCC = 15 V
TA = 25°C
20 k
50 k 100 k 200 k
500 k
fOSC, OSCILLATOR FREQUENCY (kHz)
1.0 M
Figure 4. Maximum Output Duty Cycle
versus Timing Resistor
100
90
80
Idischg = 7.5 mA
70
60
50
40
0.8 1.0
Idischg = 8.8 mA
VCC = 15 V
CT = 3.3 nF
TA = 25°C
2.0
3.0 4.0 5.0 6.0 7.0 8.0
RT, TIMING RESISTOR (k)
4
MOTOROLA ANALOG IC DEVICE DATA
 

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