Datasheet

3
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
=0F,C
OUT2
=0F.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
CLK V
OH
I
CLK
= 3 mA 4.3 4.7 V
CLK V
OL
I
CLK
= 3 mA 0.3 0.5 V
Ramp Generator Section
Ramp V
OL
I
RAMP
= 100 mA 50 100 mV
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
I
EAIN
EAOUT = EAIN 150 400 nA
EAOUT, VOL EAIN = 2.6 V, I
EAOUT
= 100 mA 0.3 0.5 V
EAOUT, VOH EAIN = 2.4 V, I
EAOUT
= 100 mA 4 5 5.5 V
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 %
SS V
OL I
SS
= 100 mA 100 350 mV
SS Restart Threshold 400 550 mV
I
SS
–20 –35 mA
SHTDWN V
TH
0.4 0.5 0.6 V
I
SHTDWN
50 150 nA
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
I
LINE
LINE=6V 50 150 nA
Supply Section
VDD Clamp I
VDD
=10mA 14 15 16 V
I
VDD
Start VDD < VDD On 160 250 A
I
VDD
Operating No Load 2.5 3.5 mA
Output Drivers Section
OUT1 V
SAT
High I
OUT1
= 50 mA 0.4 1.0 V
OUT1 V
SAT
Low I
OUT1
=100 mA 0.4 1.0 V
OUT2 V
SAT
High I
OUT2
= 30 mA 0.4 1.0 V
OUT2 V
SAT
Low I
OUT2
= 30 mA 0.4 1.0 V
OUT1 Fall Time C
OUT1
= 1nF, RS =3W 20 50 ns
OUT1 Rise Time C
OUT1
= 1nF, RS =3W 40 80 ns
OUT2 Fall Time C
OUT2
= 300pF, RS =10W 20 50 ns
OUT2 Rise Time C
OUT2
= 300pF, R
S
=10W 20 40 ns