UC3842T STMICROELECTRONICS [STMicroelectronics], UC3842T Datasheet - Page 4

• Manufacturer Part Number: UC3842T
• Description: HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Notes : 1. Max package power dissipation limits must be respected; low duty cycle pulse techniques are used during test maintain T
UC3842T - UC3843T - UC3844T - UC3845T
ELECTRICAL CHARACTERISTICS (continued)
4/15
OUTPUT SECTION
UNDER-VOLTAGE LOCKOUT SECTION
PWM SECTION
TOTAL STANDBY CURRENT
Symbol
V
V
V
V
I
OLS
t
OH
t
I
OL
st
r
f
i
iz
2. These parameters, although guaranteed, are not 100% tested in production.
3. Parameter measured at trip point of latch with V
4. Gain defined as :
5. Adjust V
close to T
A =
Output Low Level
Output High Level
UVLO Saturation
Rise Time
Fall Time
Start Threshold
Min Operating Voltage
After Turn-on
Maximum Duty Cycle
Minimum Duty Cycle
Start-up Current
Operating Supply Current
Zener Voltage
V
V
i
above the start threshold before setting at 15 V.
PIN1
PIN3
amb
as possible.
; 0 V
Parameter
PIN3
0.8 V
I
I
ISOURCE = 20mA
I
VCC = 6V; I
T
T
UC3842T/4T
UC3843T/5T
UC3842T/4T
UC3843T/5T
UC3842T/3T
UC3844T/5T
V
V
V
I
SINK
SINK
SOURCE
i
j
j
i
i
PIN2
= 25mA
PIN2
= 25 C C
= 25 C C
= 6.5V for UC3843T/45T
= 14V for UC3842T/44T
= 20mA
= 200mA
= 0.
= V
Test Conditions
= 200mA
PIN3
SINK
L
L
= 0V
= 1nF (2)
= 1nF (2)
= 1mA
Min.
7.8
7.0
13
12
15
94
47
30
9
Value
Typ.
13.5
13.5
0.1
1.6
0.1
8.4
7.6
0.3
0.3
50
50
16
10
96
48
12
36
Max.
150
150
100
0.4
2.2
1.1
9.0
8.2
0.5
0.5
17
11
50
17
0
j
Unit
as
mA
mA
mA
ns
ns
%
%
%
V
V
V
V
V
V
V
V
V
V