UC3842BN1 Просмотр технического описания (PDF) - ON Semiconductor
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UC3842BN1 Datasheet PDF : 20 Pages
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV
MAXIMUM RATINGS
Rating
Bias and Driver Voltages (Zero Series Impedance, see also Total Device spec)
Total Power Supply and Zener Current
Output Current, Source or Sink (Note 1)
Output Energy (Capacitive Load per Cycle)
Current Sense and Voltage Feedback Inputs
Error Amp Output Sink Current
Power Dissipation and Thermal Characteristics
D Suffix, Plastic Package, SO–14 Case 751A
Maximum Power Dissipation @ TA = 25°C
Thermal Resistance, Junction–to–Air
D1 Suffix, Plastic Package, SO–8 Case 751
Maximum Power Dissipation @ TA = 25°C
Thermal Resistance, Junction–to–Air
N Suffix, Plastic Package, Case 626
Maximum Power Dissipation @ TA = 25°C
Thermal Resistance, Junction–to–Air
Operating Junction Temperature
Operating Ambient Temperature
UC3842B, UC3843B
UC2842B, UC2843B
UC3842BV, UC3843BV, NCV3843BV
Storage Temperature Range
Symbol
VCC, VC
(ICC + IZ)
IO
W
Vin
IO
Value
30
30
1.0
5.0
– 0.3 to + 5.5
10
PD
RθJA
PD
RθJA
PD
RθJA
TJ
TA
Tstg
862
145
702
178
1.25
100
+150
0 to + 70
– 25 to + 85
–40 to +105
– 65 to +150
Unit
V
mA
A
µJ
V
mA
mW
°C/W
mW
°C/W
W
°C/W
°C
°C
°C
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, XBV
Characteristics
Symbol Min Typ Max Min Typ Max Unit
REFERENCE SECTION
Reference Output Voltage (IO = 1.0 mA, TJ = 25°C)
Vref
4.95 5.0 5.05 4.9 5.0 5.1
V
Line Regulation (VCC = 12 V to 25 V)
Regline
–
2.0
20
–
2.0
20
mV
Load Regulation (IO = 1.0 mA to 20 mA)
Temperature Stability
Regload
–
3.0
25
–
3.0
25
mV
TS
–
0.2
–
–
0.2
– mV/°C
Total Output Variation over Line, Load, and Temperature
Vref
4.9
–
5.1 4.82
–
5.18
V
Output Noise Voltage (f = 10 Hz to 10 kHz, TJ = 25°C)
Long Term Stability (TA = 125°C for 1000 Hours)
Vn
–
50
–
–
50
–
µV
S
–
5.0
–
–
5.0
–
mV
Output Short Circuit Current
ISC
– 30 – 85 –180 – 30 – 85 –180 mA
OSCILLATOR SECTION
Frequency
TJ = 25°C
TA = Tlow to Thigh
TJ = 25°C (RT = 6.2 k, CT = 1.0 nF)
Frequency Change with Voltage (VCC = 12 V to 25 V)
fOSC
kHz
49
52
55
49
52
55
48
–
56
48
–
56
225 250 275 225 250 275
∆fOSC/∆V
–
0.2 1.0
–
0.2 1.0
%
Frequency Change with Temperature, TA = Tlow to Thigh
∆fOSC/∆T
–
1.0
–
–
0.5
–
%
Oscillator Voltage Swing (Peak–to–Peak)
VOSC
–
1.6
–
–
1.6
–
V
Discharge Current (VOSC = 2.0 V)
TJ = 25°C
TA = Tlow to Thigh (UC284XB, UC384XB)
TA = Tlow to Thigh (UC384XBV)
Idischg
mA
7.8 8.3 8.8 7.8 8.3 8.8
7.5
–
8.8 7.6
–
8.8
–
–
–
7.2
–
8.8
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 = 0°C for UC3842B, UC3843B; –25°C for UC2842B, UC2843B; –40°C for UC3842BV, UC3843BV
Thigh = +70°C for UC3842B, UC3843B; +85°C for UC2842B, UC2843B; +105°C for UC3842BV, UC3843BV
NCV3843BV: Tlow = –40°C, Thigh = +105°C. Guaranteed by design. NCV prefix is for automotive and other applications requiring site and
change control.
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