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UC2842A Datasheet(PDF) 4 Page - STMicroelectronics

Part No. UC2842A
Description  HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UC2842A Datasheet(HTML) 4 Page - STMicroelectronics

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UC384XA - UC284XA
4/16
Notes: 1. Max package power dissipation limits must be respected; low duty cycle pulse techniques are used during test maintain Tj as close
to Tamb as possible.
2. These parameters, although guaranteed, are not 100% tested in production.
3. Parameter measured at trip point of latch with VPIN2 = 0.
4. Gain defined as : A =
∆VPIN1/∆VPIN3; 0 ≤ VPIN3 ≤ 0.8V
5. Adjust Vi above the start threshold before setting at 15 V.
OUTPUT SECTION
VOL
Output Low Level
ISINK = 20mA
0.1
0.4
0.1
0.4
V
ISINK = 200mA
1.6
2.2
1.6
2.2
V
VOH
Output High Level
ISOURCE = 20mA
13
13.5
13
13.5
V
ISOURCE = 200mA
12
13.5
12
13.5
V
VOLS
UVLO Saturation
VCC = 6V; I
SINK = 1mA
0.7
1.2
0.7
1.2
V
tr
Rise Time
Tj = 25°C
CL = 1nF
(2)
50
150
50
150
ns
tf
Fall Time
Tj = 25°C
CL = 1nF
(2)
50
150
50
150
ns
UNDER-VOLTAGE LOCKOUT SECTION
Start Threshold
X842A/4A
15
16
17
14.5
16
17.5
V
X843A/5A
7.8
8.4
9.0
7.8
8.4
9.0
V
Min Operating Voltage
After Turn-on
X842A/4A
9
10
11
8.5
10
11.5
V
PWM SECTION
Maximum Duty Cycle
X842A/3A
94
96
100
94
96
100
%
X844A/5A
47
48
50
47
48
50
%
Minimum Duty Cycle
0
0
%
TOTAL STANDBY CURRENT
Ist
Start-up Current
Vi = 6.5V for UCX843A/
45A
0.3
0.5
0.3
0.5
mA
Vi = 14V for UCX842A/44A
0.3
0.5
0.3
0.5
mA
Ii
Operating Supply Current
VPIN2 = VPIN3 = 0V
12
17
12
17
mA
Viz
Zener Voltage
Ii = 25mA
3036
3036
V
Table 5. Electrical Characteristcs (continued)
( [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.


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