UCC1883 Unitrode Semiconductor, UCC1883 Datasheet - Page 3

• Manufacturer Part Number: UCC1883
• Description: Micropower Peak Current Mode Controller
• Manufacturer: Unitrode Semiconductor

ELECTRICAL CHARACTERISTICS
UCC3883, T
CT = 100pF, T
UVLO Section
Linear Pre-Regulator Section
User Bias Section
Input Current Limit Section
Oscillator Section
Soft Start Section
Fault Handling Section
Current Sense Section
PWM Logic and Output Section
VCC Start Threshold
VCC Threshold Hysteresis
Regulated VCC Voltage
Regulated V
VCC Override Threshold
RBIAS Voltage
RBIAS Voltage Line Regulation
Total RBIAS Voltage Variation
IIN Offset Voltage
Output Reference Current
I
Total I
VLIMIT Low Level
VLIMIT High Level
VLIMIT Output Current
Initial Accuracy
Voltage Stability
Total Oscillator Variation
CT Ramp Amplitude
Soft Start Current (source)
Restart Delay Current (sink)
Overload Current Source
Overload Current Sink
Overload Fault Threshold
Overcurrent Threshold
Overcurrent Delay
Peak Current Limit Threshold
Minimum Duty Cycle
Maximum Duty Cycle
OUT Low Level
OUT High Level
OUT Rise Time
OUT Fall Time
REF
Line Regulation
REF
A
Variation
= 40 C to +85 C for the UCC2883, 55 C to +125 C for the UCC1883, VCC
A
=T
CC
PARAMETERS
J
to UVLO Delta
.
Unless otherwise noted, all specifications apply for T
Initial + Line + Temperature
CSTART = 2.5V
(See Figure 1) (Note 6)
I
I
(See Note 4)
T
10.0V < VCC < 13.5V
Initial + Line + Temperature
VLIMIT = 3V
T
10.0V < VCC < 13.5V
IIN = 0.2V, OUT < 10nA
IIN = 0.2V, OUT < 10nA
IIN = 0.2V, VLIMIT = 3V
T
10.0V < VCC < 13.5V
Initial + Line + Temperature
CSTART = 2.5V
COL = 0.5V
COL = 0.5V
ISENSE = 0V
ISENSE = 1.3V
I
I
T
T
OUT
OUT
OUT
OUT
J
J
J
J
J
= +25°C
= 25°C, IIN = 0V
= 25°C
= 25°C,C
= 25°C,C
= 10mA
= 100mA
= 10mA
= 100mA
LOAD
LOAD
TEST CONDITIONS
3
= 1nF (See Figure 2)
= 1nF (See Figure 2)
=
12V , VDD = 5V , RBIAS = 200k ,
A
11.85
-10.5
= 0 C to 70 C for the
2.35
10.5
MIN
1.17
29.5
1.15
8.0
0.5
1.4
1.4
1.4
1.5
8.5
1.6
1.5
1.4
1.1
30
17
49
0
20
3
11.95
TYP
0.05
11.5
500
100
9.0
9.5
1.2
1.9
0.6
2.5
2.3
2.2
1.5
1.5
1.2
0.5
10
35
30
50
25
25
2
8
6
1
1
9
MAX UNITS
10.5
1.23
2.65
0.15
10.5
1.25
41.5
800
200
2.1
1.0
3.0
3.0
1.6
1.5
2.5
2.2
1.6
1.3
11
20
14
40
43
75
16
50
50
75
2
0
3
UCC1883
UCC2883
UCC3883
kHz
kHz
mV
mV
mV
mA
mA
nA
ns
ns
ns
%
%
%
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
A
A
A
A
A