UCC3912
ELECTRICAL CHARACTERISTICS:
Unless otherwise stated, these specifications apply for T
J
= 0°C to 70°C, VIN = 5V,
IMAX = 0.4V, SHTDWN = 2.4V.
PARAMETER
Output Section (cont.)
Reverse Leakage Current
Initial Start-up Time
Short Circuit Response
Thermal Shutdown
Thermal Hysteresis
DAC Section
Output Leakage
Trip Current
TEST CONDITIONS
V
IN
< V
OUT ,
SHTDWN = 0.2V,
V
OUT
= 5V
(Note 2)
(Note 2)
(Note 2)
(Note 2)
Code = 0000-0011
Code = 0100
Code = 0101
Code = 0110
Code = 0111
Code = 1000
Code = 1001
Code = 1010
Code = 1011
Code = 1100
Code = 1101
Code = 1110
Code = 1111
Code = 0000 to 0011
Code = 0100 to 1111, IMAX = 0V
Code = 0100 to 1111, I
MAX
= 2.4V
V
CT
= 1.0V
V
CT
= 1.0V
V
OUT
= 0V
MIN
TYP
5
100
100
170
10
0
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
2.75
3.0
1.0
4.0
−36.0
1.2
3.0
1.5
0.5
1.5
100
100
20
0.45
0.75
1.0
1.25
1.5
1.75
2.0
2.3
2.58
2.9
3.2
3.5
0.02
1.8
5.2
−22.0
1.5
6.0
1.7
0.6
1.9
500
500
0.8
MAX UNITS
20
µA
µs
ns
°C
°C
µA
A
A
A
A
A
A
A
A
A
A
A
A
mA
A
A
µA
µA
%
V
V
V
mV
nA
nA
V
V
V
µA
µA
0.1
0.25
0.5
0.75
1.0
1.25
1.5
1.7
1.9
2.1
2.3
2.5
0.5
3.0
−45.0
0.72
2.0
1.3
0.4
1.1
Max Output Current
Max Output Current Over Trip (Current Source
Mode)
Max Output Current (Current Source Mode)
Timer Section
CT Charge Current
CT Discharge Current
Output Duty Cycle
CT Fault Threshold
CT Reset Threshold
Shutdown Section
Shutdown Threshold
Shutdown Hysteresis
Input Current
Fault Output Section
Output Leakage Current
Low Level Output Voltage
TTL Input DC Characteristics Section
TTL Input Voltage High
TTL Input Voltage Low
TTL Input High Current
TTL Input Low Current
SHTDWN = 1V
I
OUT
= 10mA
(can be connected to V
IN
)
V
IH
= 2.4V
V
IL
= 0.4V
2.0
0.4
3
0.8
10
1
Note 1:
All voltages are with respect to Ground. Current is positive into and negative out of the specified terminal.
Note 2:
Guaranteed by design. Not 100% tested in production.
3
TI [ TEXAS INSTRUMENTS ]
