PARAMETER

TEST CONDITION

UC1842/3/4/5

UC2842/3/4/5

UC3842/3/4/5

UNITS

MIN

TYP

MAX

MIN

TYP

MAX

Output Section

Output Low Level

0.1

0.4

0.1

0.4

V

1.5

2.2

1.5

2.2

V

Output High Level

13

13.5

13

13.5

V

12

13.5

12

13.5

V

Rise Time

50

150

50

150

ns

Fall Time

50

150

50

150

ns

Under-voltage Lockout Section

Start Threshold

X842/4

15

16

17

14.5

16

17.5

V

X843/5

7.8

8.4

9.0

7.8

8.4

9.0

V

Min. Operating Voltage

After Turn On

X842/4

9

10

11

8.5

10

11.5

V

X843/5

7.0

7.6

8.2

7.0

7.6

8.2

V

PWM Section

Maximum Duty Cycle

X842/3

95

97

100

95

97

100

%

X844/5

46

48

50

47

48

50

%

Minimum Duty Cycle

0

0

%

Total Standby Current

Start-Up Current

0.5

1

0.5

1

mA

Operating Supply Current

11

17

11

17

mA

30

34

30

34

V

Note 2: These parameters, although guaranteed, are not 100% tested in production.

Note 4: Gain defined as:

A

=

; 0

Note 6: Output frequency equals oscillator frequency for the UC1842 and UC1843.

Output frequency is one half oscillator frequency for the UC1844 and UC1845.

UC1842/3/4/5

UC2842/3/4/5

UC3842/3/4/5

UC184X;

ERROR AMP CONFIGURATION

Error Amp can Source or Sink up to 0.5mA

4