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UC284XA Datasheet(PDF) 3 Page - STMicroelectronics

Part No. UC284XA
Description  HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UC284XA Datasheet(HTML) 3 Page - STMicroelectronics

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UC384XA - UC284XA
Table 4. Thermal Data
Symbol
Parameter
DIP-8
SO-8
Unit
Rth j-amb
Thermal Resistance Junction-ambient
Max.
100
150
°C/W
Table 5. Electrical Characteristcs
( [note 1] Unless otherwise stated, these specifications apply for -25 < Tamb < 85°C for UC284XA;
0 < Tamb < 70°C for UC384XA; Vi = 15V (note 5); RT = 10K; CT = 3.3nF)
Symbol
Parameter
Test Condition
UC284XA
UC384XA
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
REFERENCE SECTION
VREF
Output Voltage
Tj = 25°C Io= 1mA
4.95
5.00
5.05
4.90
5.00
5.10
V
∆VREF
Line Regulation
12V
≤ Vi ≤ 25V
2
20
2
20
mV
∆VREF
Load Regulation
1
≤ Io ≤ 20mA
3
25
3
25
mV
∆VREF/∆T Temperature Stability
(Note 2)
0.2
0.2
mV/°C
Total Output Variation
Line, Load, Temperature
4.9
5.1
4.82
5.18
V
eN
Output Noise Voltage
10Hz
≤ f ≤ 10KHz
Tj = 25°C (note 2)
50
50
µV
Long Term Stability
Tamb = 125
°C, 1000Hrs
(note 2)
525
5
25
mV
ISC
Output Short Circuit
-30
-100
-180
-30
-100
-180
mA
OSCILLATOR SECTION
fOSC
Frequency
Tj = 25°C
47
52
57
47
52
57
KHz
∆fOSC/∆V Frequency Change with Volt.
VCC = 12V to 25V
0.2
1
0.2
1
%
∆VREF/∆T Frequency Change with Temp.
TA = Tlow to Thigh
–5–
–5
%
VOSC
Oscillator Voltage Swing
(peak to peak)
1.6
1.6
V
Idischg
Discharge Current (VOSC =2V)
TJ = 25°C
7.8
8.3
8.8
7.8
8.3
8.8
mA
ERROR AMP SECTION
V2
Input Voltage
VPIN1 = 2.5V
2.45
2.50
2.55
2.42
2.50
2.58
V
Ib
Input Bias Current
VFB = 5V
-0.1
-1
-0.1
-2
µA
AVOL
2V
≤ Vo ≤ 4V
65
90
65
90
dB
BW
Unity Gain Bandwidth
TJ = 25°C
0.7
1
0.7
1
MHz
PSRR
Power Supply Rejec. Ratio
12V
≤ Vi ≤ 25V
6070
6070
dB
Io
Output Sink Current
VPIN2 = 2.7V
VPIN1= 1.1V
212
2
12
mA
Io
Output Source Current
VPIN2 = 2.3V VPIN1 = 5V
-0.5
-1
-0.5
-1
mA
VOUT High
VPIN2 = 2.3V;RL = 15KΩ to
Ground
5
6.2
5
6.2
V
VOUT Low
VPIN2 = 2.7V;RL = 15KΩ to
Pin 8
0.8
1.1
0.8
1.1
V
CURRENT SENSE SECTION
GV
Gain
(note 3 & 4)
2.85
3
3.15
2.85
3
3.15
V/V
V3
Maximum Input Signal
VPIN1 = 5V (note 3)
0.9
1
1.1
0.9
1
1.1
V
SVR
Supply Voltage Rejection
12
≤ Vi ≤ 25V (note 3)
70
70
dB
Ib
Input Bias Current
-2
-10
-2
-10
µA
Delay to Output
150
300
150
300
ns


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