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UC3842B Datasheet(PDF) 2 Page - Unisonic Technologies

Part No. UC3842B
Description  HIGH PERFORMANCE CURRENT MODE CONTROLLERS
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Maker  UTC [Unisonic Technologies]
Homepage  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UC3842B Datasheet(HTML) 2 Page - Unisonic Technologies

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UTCUC3842B/3843B LINEARINTEGRATEDCIRCUIT
UTC UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R103-012,A
ABSOLUTE MAXIMUM RATINGS(Ta=25°C)
PARAMETER
SYMBOL
VALUE
UNIT
Total power supply and Zener current
(ICC + Iz)
30
mA
Output current, source or sink (note1)
Io
1.0
A
Output energy (capacitive load per cycle)
W
5.0
µJ
Current sense and voltage feedback
inputs
Vin
-0.3 ~ +5.5
V
Error Amp. Output sink current
Io
10
mA
Power dissipation and thermal
characteristics
PD
P
θJA
DIP:1250
SOP: 702
DIP: 100
SOP: 178
mW
°C/W
Operating junction temperature
Tj
+150
°C
Operating ambient temperature
TA
0 ~ +70
°C
Storage temperature range
Tstg
-65 ~ +150
°C
ELECTRICAL CHARACTERISTICS (0°C <=TA<=70°C,VCC=15V[note 2],RT=10k,CT=3.3nF,unless
otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Reference Section
Output Voltage
VREF
Io=1.0mA,Tj=25
°C
4.9
5.0
5.1
V
Line Regulation
Regline
Vcc=12V to 25V
2.0
20
mV
Load Regulation
Regload
Io=1.0mA to 20mA
3.0
25
mV
Temperature Stability
Ts
0.2
mV/
°C
Total Output Variation
Vref
Line, Load, Temperature
4.82
5.18
V
Output Noise Voltage
Vn
F=10kHz to 10Hz,Tj=25
°C
50
uV
Long Term Stability
S
TA=125
°C,1000Hrs
5
mV
Output Short Circuit Current
ISC
-30
-85
-180
mA
Oscillator Section
Frequency
Tj=25
°C
TA=0
°C to 70°C
Tj=25
°C (RT=6.2k,CT=1.0nF)
49
48
225
52
250
55
56
275
kHz
Frequency Change with Voltage
∆fOSC/∆V
12<=Vcc<=25V
0.2
1.0
%
Frequency Change with
Temperature
∆fOSC/∆T
0
°C <=TA<=70°C
0.5
%
Oscillator Voltage Swing(Peak to
Peak)
VOSC
1.6
V
Discharge Current
Idischg
Tj=25
°C
0
°C <=TA<=70°C
7.8
7.6
8.3
8.8
8.8
mA
Error Amplifier Section
Voltage Feedback Input
VFB
Vo=2.5V
2.42
2.50
2.58
V
Input Bias Current
IIB
VFB=5.0V
-0.1
-2.0
µA
Open Loop Voltage Gain
AVOL
2 <=Vo<=4V
65
90
dB
Unity Gain Bandwidth
BW
Tj=25
°C
0.7
1.0
MHz
Power Supply Rejection Ratio
PSRR
I2V<=Vcc<=25V
60
70
dB
Output Sink Current
Isink
Vo=1.1V,VFB =2.7V
2.0
12
mA
Output Source Current
Isource
Vo=5.0V,VFB=2.3V
-0.5
-1.0
mA
Output Voltage Swing High State
VOH
VFB=2.3V, RL=15k to GND
5.0
6.2
V
Output Voltage Swing Low State
VOL
VFB=2.7V, RL=15k to Vref
0.8
1.1
V
Current Sense section
Current Sense Input Voltage
Gain
Av
(note 3,4)
2.85
3.0
3.15
V/V


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