UCC1580-1 Unitrode Semiconductor, UCC1580-1 Datasheet - Page 2

• Manufacturer Part Number: UCC1580-1
• Description: Single Ended Active Clamp Reset PWM
• Manufacturer: Unitrode Semiconductor

DESCRIPTION (cont.)
and -4 versions, OUT2 is inverted and can be used to
drive NMOS FETs. In all versions, both the main and
auxiliary switches are held off prior to startup and when
the PWM command goes to zero duty cycle. During
fault conditions, OUT1 is held off while OUT2 operates
at maximum duty cycle with a guaranteed off time equal
to the sum of the two deadtimes.
Undervoltage lockout monitors supply voltage (VDD),
the precision reference (REF), input line voltage (LINE),
and the shutdown comparator (SHTDWN). If after any
of these four have sensed a fault condition, recovery to
full operation is initiated with a soft start. VDD thresh-
olds, on and off, are 15V and 8.5V for the -2 and -4 ver-
sions, 9V and 8.5V for the -1 and -3 versions.
ABSOLUTE MAXIMUM RATINGS
All voltages are with respect to ground unless otherwise stated.
Currents are positive into, negative out of the specified termi-
nal. Consult Packaging Section of Databook for thermal limita-
tions and considerations of packages.
ORDER INFORMATION
VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16V
I
LINE, RAMP . . . . . . . . . . . . . . . . . . . . . . . .
I
DELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3V
I
I
I
I
OSC1, OSC2, SS, SHTDWN, EAIN . . . .
I
I
PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.2V to 0.2V
Storage Temperature. . . . . . . . . . . . . . . . . . .
Junction Temperature . . . . . . . . . . . . . . . . . .
Lead Temperature (Soldering, 10 sec.) . . . . . . . . . . . . +300°C
ELECTRICAL CHARACTERISTICS
12V, R1 = 18.2k, R2 = 4.41k, C
the UCC2580, 55°C to 125°C for the UCC1580, T
VDD
LINE
DELAY
OUT1
OUT2
CLK
EAOUT
REF
Oscillator Section
Frequency
CLK Pulse Width
CLK V
CLK V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25mA
, I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mA to 100mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(tpw < 1 s and Duty Cycle < 10%) . . . . . . 0.6A to 1.2A
(tpw < 1 s and Duty Cycle < 10%) . . . . . . 0.4A to 0.4A
RAMP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA to 5mA
OH
OL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
PARAMETER
T
= 100pF, R3 = 100k, C
0.3V to REF + 0.3V
0.3V to VDD + 1V
Unless otherwise stated, all specifications are over the full temperature range, VDD =
65°C to +150°C
55°C to +150°C
I
I
CLK
CLK
A
= T
= 3mA
= 3mA
OUT1
J
.
30mA
5mA
= 0, C
TEST CONDITIONS
2
OUT2
The UCC1580-x is specified for operation over the mili-
tary temperature range of
UCC2580-x is specified from
UCC3580-x is specified from 0°C to 70°C. Package op-
tions include 16-pin surface mount or dual in-line, and
20-pin plastic leadless chip carrier.
Prospective users of this IC are advised that, while use
in certain applications could potentially violate patent
rights of one or more third parties, this product has
been licensed for use in flyback power supply applica-
tions as described by U.S. Patent 5,402,329 from Tech-
nical Witts, Inc. Unitrode disclaims any other liability
and suggests that users consult their own legal advi-
sors.
CONNECTION DIAGRAMS
DIL-16, SOIC-16 (Top View)
J, N, or D Packages
PLCC-20 (Top View)
Q Packages
= 0. T
A
= 0°C to 70°C for the UCC3580, 40°C to 85°C for
MIN
370
650
4.3
55°C to 125°C. The
40°C to 85°C. The
UCC1580-1,-2,-3,-4
UCC2580-1,-2,-3,-4
UCC3580-1,-2,-3,-4
TYP
400
750
4.7
0.3
MAX UNITS
430
850
0.5
kHz
ns
V
V