UC3854N-F Datasheet, PDF (2/12 Pages) Texas Instruments – High Power Factor Preregulator

ABSOLUTE MAXIMUM RATINGS
Supply Voltage VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V
GT Drv Current, Continuous . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5A
GT Drv Current, 50% Duty Cycle. . . . . . . . . . . . . . . . . . . . . . . . . 1.5A
Input Voltage, VSENSE, VRMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11V
Input Voltage, ISENSE, Mult Out . . . . . . . . . . . . . . . . . . . . . . . . . . . 11V
Input Voltage, PKLMT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V
Input Current, RSET, IAC, PKLMT, ENA . . . . . . . . . . . . . . . . . . . 10mA
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1W
Storage Temperature . . . . . . . . . . . . . . . . . . . . –65^oC to +150^oC
Lead Temperature (Soldering, 10 Seconds) . . . . . . . . . . . . . . +300^oC
UC1854
UC2854
UC3854
Note 1: All voltages with respect to Gnd (Pin 1).
Note 2: All currents are positive into the specified termi-
nal.
Note 3: ENA input is internally clamped to approximately
14V.
Note 4: Consult Unitrode Integrated Circuits databook for
information regarding thermal specifications and limita-
CONNECTION DIAGRAMS
DIL–16 & SOIC-16
(Top View)
J, N & DW Packages
PLCC-20 & LCC-20
(Top View)
Q & L Packages
PACKAGE PIN FUNCTION
FUNCTION
PIN
N/C
1
Gnd
2
PKLMT
3
CA Out
4
ISENSE
5
N/C
6
Mult Out
7
IAC
8
VA Out
9
VRMS
10
N/C
11
VREF
12
ENA
13
VSENSE
14
RSET
15
N/C
16
SS
17
CT
18
VCC
19
GT Drv
20
ELECTRICAL
Unless otherwise stated, VCC=18V, RSET=15k to ground, CT=1.5nF to ground, PKLMT=1V, ENA=7.5V,
CHARACTERISTICS ^VRMS^{=1.5V, I}AC^{=100µA, I}SENSE^{=0V, CA Out=3.5V, VA Out=5V, V}SENSE^{=7.5V, no load on SS, CA Out,}
VA Out, REF, GT Drv, –55^oC<TA<125^oC for the UC1854, –40^oC<TA<85^oC for the UC2854, and
0^oC<TA<70^oC for the UC3854, and TA=TJ.
PARAMETER
OVERALL
Supply Current, Off
Supply Current, On
VCC Turn-On Threshold
VCC Turn-Off Threshold
ENA Threshold, Rising
ENA Threshold Hysteresis
ENA Input Current
VRMS Input Current
VOLTAGE AMPLIFIER
Voltage Amp Offset Voltage
VSENSE Bias Current
Voltage Amp Gain
Voltage Amp Output Swing
Voltage Amp Short Circuit Current
SS Current
ENA=0V
ENA=0V
VRMS=5V
VA Out=5V
VA Out=0V
SS=2.5V
TEST CONDITIONS
MIN
TYP
MAX UNITS
1.5
2.0
mA
10
16
mA
14.5
16
17.5
V
9
10
11
V
2.4
2.55
2.7
V
0.2
0.25
0.3
V
–5.0
–0.2
5.0
µA
–1.0
–.01
1.0
µA
–8
8
mV
–500
–25
500
nA
70
100
dB
0.5 to 5.8
V
–36
–20
–5
mA
–20
–14
–6
µA
2