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UC2842ADR2 View Datasheet(PDF) - ON Semiconductor

Part Name
Description
Manufacturer
UC2842ADR2
ON-Semiconductor
ON Semiconductor ON-Semiconductor
UC2842ADR2 Datasheet PDF : 18 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
UC3842A, UC3843A, UC2842A, UC2843A
ELECTRICAL CHARACTERISTICS (VCC = 15 V, [Note 4], RT = 10 k, CT = 3.3 nF, TA = Tlow to Thigh [Note 5],
unless otherwise noted.)
UC284XA
UC384XA
Characteristics
Symbol
Min
Typ
Max Min
Typ
Max Unit
CURRENT SENSE SECTION
Current Sense Input Voltage Gain (Notes 6 & 7)
Maximum Current Sense Input Threshold (Note 6)
Power Supply Rejection Ratio
VCC = 12 to 25 V (Note 6)
AV
Vth
PSRR
2.85
3.0
3.15 2.85
3.0
3.15
V/V
0.9
1.0
1.1
0.9
1.0
1.1
V
70
dB
70
Input Bias Current
IIB
−2.0
−10
−2.0
−10
mA
Propagation Delay (Current Sense Input to Output) tPLH(in/out)
150
300
150
300
ns
OUTPUT SECTION
Output Voltage
Low State (ISink = 20 mA)
Low State (ISink = 200 mA)
High State (ISink = 20 mA)
High State (ISink = 200 mA)
V
VOL
0.1
0.4
0.1
0.4
1.6
2.2
1.6
2.2
VOH
13
13.5
13
13.5
12
13.4
12
13.4
Output Voltage with UVLO Activated
VCC = 6.0 V, ISink = 1.0 mA
VOL(UVLO)
V
0.1
1.1
0.1
1.1
Output Voltage Rise Time (CL = 1.0 nF, TJ = 25°C)
tr
50
150
50
150
ns
Output Voltage Fall Time (CL = 1.0 nF, TJ = 25°C)
tf
50
150
50
150
ns
UNDERVOLTAGE LOCKOUT SECTION
Startup Threshold
UCX842A
UCX843A
Vth
V
15
16
17
14.5
16
17.5
7.8
8.4
9.0
7.8
8.4
9.0
Minimum Operating Voltage After Turn−On
UCX842A
UCX843A
VCC(min)
V
9.0
10
11
8.5
10
11.5
7.0
7.6
8.2
7.0
7.6
8.2
PWM SECTION
Duty Cycle
Maximum
Minimum
%
DCmax
94
96
94
96
DCmin
0
0
TOTAL DEVICE
Power Supply Current (Note 4)
Startup:
(VCC = 6.5 V for UCX843A,
(VCC = 14 V for UCX842A) Operating
ICC
mA
0.5
1.0
0.5
1.0
12
17
12
17
Power Supply Zener Voltage (ICC = 25 mA)
VZ
30
36
30
36
V
4. Adjust VCC above the Startup threshold before setting to 15 V.
5. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
Tlow = 0°C for UC3842A, UC3843A
−25°C for UC2842A, UC2843A
Thigh = +70°C for UC3842A, UC3843A
+85°C for UC2842A, UC2843A
6. This parameter is measured at the latch trip point with VFB = 0 V.
7. Comparator gain is defined as: AV DV Output Compensation
DV Current Sense Input
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