UCC1580-1,-2,-3,-4
UCC2580-1,-2,-3,-4
UCC3580-1,-2,-3,-4
ELECTRICAL CHARACTERISTICS
Unless otherwise stated, all specifications are over the full temperature range, VDD =
12V, R1 = 18.2 kW , R2 = 4.41 kW , C
T
= 130 pF, R3 = 100 kW , C
OUT1
= 0 F, C
OUT2
= 0 F. T
A
= 0°C to 70°C for the UCC3580,
-40°C
to 85°C for the UCC2580,
-55°C
to 125°C for the UCC1580, T
A
= T
J
.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNITS
Oscillator Section
Frequency
370
400
430
kHz
CLK Pulse Width
650
750
850
ns
I
CLK
= 3 mA
4.3
4.7
V
CLK V
OH
I
CLK
= 3 mA
0.3
0.5
V
CLK V
OL
Ramp Generator Section
I
RAMP
= 100
mA
50
100
mV
Ramp V
OL
Flux Comparator Vth
3.16
3.33
3.50
V
Pulse Width Modulator Section
Minimum Duty Cycle
OUT1, EAOUT = VOL
0
%
Maximum Duty Cycle
OUT1, EAIN = 2.6 V
63
66
69
%
PWM Comparator Offset
0.1
0.4
0.9
V
Error Amplifier Section
EAIN
EAOUT = EAIN
2.44
2.5
2.56
V
EAOUT = EAIN
150
400
nA
I
EAIN
0.3
0.5
V
EAOUT, VOL
EAIN = 2.6 V, I
EAOUT
= 100
mA
4
5
5.5
V
EAOUT, VOH
EAIN = 2.4 V, I
EAOUT
= 100
mA
AVOL
70
80
dB
Gain Bandwidth Product
f = 100 kHz (Note 1)
2
6
MHz
Softstart/Shutdown Section
Start Duty Cycle
EAIN = 2.4 V
0
%
I
SS
= 100
mA
100
350
mV
SS V
OL
SS Restart Threshold
400
550
mV
–20
–35
mA
I
SS
0.4
0.5
0.6
V
SHTDWN V
TH
50
150
nA
I
SHTDWN
Undervoltage Lockout Section
VDD On
UCC3580-2,-4
14
15
16
V
UCC3580-1,-3
8
9
10
V
VDD Off
7.5
8.5
9.5
V
LINE On
4.7
5
5.3
V
LINE Off
4.2
4.5
4.8
V
LINE = 6 V
50
150
nA
I
LINE
Supply Section
14
15
16
V
VDD Clamp
I
VDD
= 10 mA
VDD < VDD On
160
250
A
I
VDD
Start
No Load
2.5
3.5
mA
I
VDD
Operating
Output Drivers Section
I
OUT1
= 50 mA
0.4
1.0
V
OUT1 V
SAT
High
I
OUT1
=100 mA
0.4
1.0
V
OUT1 V
SAT
Low
I
OUT2
= 30 mA
0.4
1.0
V
OUT2 V
SAT
High
I
OUT2
= 30 mA
0.4
1.0
V
OUT2 V
SAT
Low
20
50
ns
OUT1 Fall Time
C
OUT1
= 1nF, R
S
= 3
W
40
80
ns
OUT1 Rise Time
C
OUT1
= 1nF, R
S
= 3
W
20
50
ns
OUT2 Fall Time
C
OUT2
= 300pF, R
S
= 10
W
20
40
ns
OUT2 Rise Time
C
OUT2
= 300pF, R
S
= 10
W
3
TI [ TEXAS INSTRUMENTS ]
