UCC1884 Unitrode Semiconductor, UCC1884 Datasheet - Page 2

• Manufacturer Part Number: UCC1884
• Description: Frequency Foldback Current Mode PWM Controller
• Manufacturer: Unitrode Semiconductor

ABSOLUTE MAXIMUM RATINGS
Currents are positive into, negative out of the specified terminal. Consult Packaging
Section of Databook for thermal limitations and considerations of packages.
CONNECTION DIAGRAMS
ELECTRICAL CHARACTERISTICS:
UCC1884, –40°C to 85°C for the UCC2884, and 0°C to 70°C for the UCC3884, CT = 150pF, R
VREF, VVS = 0V, CSS = 2.5nF, VDD = 11V, Output no load, T
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Output Sink Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1A
Output Source Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5A
All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to +150°C
Lead Temperature (Soldering, 10 sec.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C
DIL-16, SOIC-16 (Top View)
J, N or D Packages
5V Reference Section
Oscillator Section
Error Amplifier Section
VREF
Line Regulation
Load Regulation
Short Circuit I
Accuracy
Foldback Frequency
CLKSYNC Output High
CLKSYNC Output Low
CLKSYNC Sink Current
CLKSYNC Source Current
CLKSYNC Input Threshold
I
FB Voltage
A
GBW
Output Source Current
Output Sink Current
B
VO
PARAMETER
I
VDD = 10V to 12V
0 < I
VREF = 0V
V
VOUT = 0.65V
CLKSYNC = 1V
CLKSYNC = 3V
CLKSYNC from 5V to 0V (Edge Detect)
Total Bias Current; Regulating Level
FB = COMP
F = 100kHz (Note 1)
FB = 2.3V, COMP = 2.5V
FB = 2.7V, V
REF
OUT
Unless otherwise specified, these specifications apply for T
REF
= 0mA
= V
< 5mA
REF
COMP
= 1V
TEST CONDITIONS
A
2
= T
J
.
PLCC-20 (Top View)
Q Package
ON
= 53k, R
0.250
4.86
2.43
–1.0
MIN
A
450
250
4.8
1.2
2.5
–1
60
= –55°C to 125°C for
OFF
–2.8
TYP
–0.2
500
300
0.2
2.2
3.5
2.5
1.5
15
90
= 38k, VOUT =
5
1
1
5
5
MAX UNITS
5.14
2.57
–0.1
550
350
5.2
0.8
10
10
45
UCC1884
UCC2884
UCC3884
1
MHz
kHz
kHz
mV
mV
mA
mA
mA
mA
mA
dB
V
V
V
V
V
A