Datasheet

UCC2897A
SLUS829D -- AUGUST 2008 -- REVISED JULY 2009
29
www.ti.com
TYPICAL CHARACTERISTICS
Figure 16
LINE UV/OV VOLTAGE THRESHOLD
vs
JUNCTION TEMPERATURE
V
TH
-- Line Thresholds -- V
T
J
-- Junction Temperature -- °C
1.20
1.22
1.24
1.26
1.28
1.30
--50 --25 0 25 50 75 100 125
Figure 17
SOFTSTART CURRENTS
vs
TEMPERATURE
I
SS(DIS)
/I
SS(CHG)
-- Softstart Currents -- μA
--50 --25 0 25 50 75 100 125
-- 2 0
-- 1 5
-- 1 0
5
15
20
0
-- 5
10
T
J
-- Junction Temperature -- °C
Softstart Discharge Current
Softstart Charge Current
Figure 18
SOFTST
A
RT
/
SHUTDOWN THRESHOLD
V
OLT
A
GE
vs
JUNCTION TEMPERATURE
V
TH
-- Softstart/Shutdown Threshold Voltage -- V
-- 5 0
0.42
0.40
--25 0 25 50 75 100 125
0.46
0.44
0.50
0.48
0.54
0.52
0.58
0.56
0.60
T
J
-- Junction Temperature -- °C
10
1K
10 K
100 K
10 M
100 1000
1M
Figure 19
SWITCHING FREQUENCY
vs
PROGRAMMING RESISTANCE
f
SW
-- Switching Frequency -- Hz
R
ON
=R
OFF
-- Timing Resistance -- kΩ