UC3853N UNITRODE, UC3853N Datasheet - Page 3

• Manufacturer Part Number: UC3853N
• Description: IC, POWER FACTOR PREREG, 3853, DIP8
• Manufacturer: UNITRODE

Specifications of UC3853N

• Primary Input Voltage: 40V
• No. Of Outputs: 1
• Output Voltage: 17.5V
• Voltage Regulator Case Style: DIP
• No. Of Pins: 8
• Operating Temperature Range: 0°C To +70°C
• Operating Temperature Max: 70°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(continued)
Note 1:
Note 2:
Note 3.
Synchronization is accomplished with a falling edge of 2V mag-
nitude and 100V/ sec slew rate.
ELECTRICAL CHARACTERISTICS
Multiplier Section
Oscillator Section
Output Driver Section
OVP Comparator Section
Output Current – IAC Limited
Output Current – Zero
Output Current – Power Limited
Output Current
Multiplier Gain Constant
Oscillator Initial Frequency
Oscillator Frequency
Synchronization Frequency Range
Synchronization Pulse Amplitude
Maximum Output Voltage
Output High
Output Low (Device Inactive)
Output Low (Device Active)
OUT Rise Time
OUT Fall Time
OUT Maximum Duty Cycle
Threshold Voltage
Hysteresis
PARAMETER
ICOMP
, VCC = 12V.
Unless otherwise stated, these parameters apply for T
UC1853; –25°C to +85°C for the 2853; and 0°C to +70°C for the UC3853; VCC =
16V, V
VCC = 11V, V
IAC = 0 A
VCC = 12V, V
VCC= 12V, V
VCC= 12V, V
VCC= 40V, V
VCC= 40V, V
VCC= 12V, V
T
Line, Load, Temperature
Pulse slew rate = 100V/
0mA load, VCC = 20V
0mA load, VCC = 12V, ref. to VCC
–50mA load, VCC = 12V, ref. to VCC
Vcc = 0V, 20mA load (Sinking)
50mA load (Sinking)
1nF from OUT to GND
1nF from OUT to GND
V
Volts Above EA Input V
A
ICOMP
= 25°C
FB
= 0V
= 3V, I
VCOMP
VCOMP
VCOMP
VCOMP
VCOMP
VCOMP
VCOMP
TEST CONDITIONS
AC
3
= 100
= 2V
= 5V
= 2V
= 5V
= 5.5V (Note 2)
= 6V
= 5.5V
m
m
sec (Note 3)
A, V
VCOMP
= 3.75V, V
ICOMP
–1.05
–230
–236
MIN
67.5
–2.7
–2
56
12
–3
88
90
A
= 3V, T
= –55°C to +125°C for the
–200
–178
–156
TYP
–0.2
–0.9
–1.7
–2.2
150
–22
–14
0.9
0.5
–2
75
75
15
55
35
93
80
A
2
= T
J
.
–0.75
MAX UNITS
–170
–168
82.5
17.5
100
100
100
2.0
94
2
1
UC1853
UC2853
UC3853
V
kHz
kHz
kHz
mV
mV
ns
ns
%
V
V
V
V
V
V
A
A
A
A
A
A
A
–1