UC3842 Ver la hoja de datos (PDF) - KEXIN Industrial
Número de pieza
componentes Descripción
Fabricante
UC3842 Datasheet PDF : 3 Pages
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SMD Type
Integrate Circuit
CURRENT MODE PWM CONTROLLER
UC3842
■ Electrical Characteristics (VCC=15V,RT=10kΩ,CT=3.3nF,TA= 0℃to+70℃,unless otherwise specified)
Parameter
Reference Output Voltage
Line Regulation
Load Regulation
Short Circuit Output Current
Oscillation Frequency
Frequency Change with Voltage
Oscillator Amplitude
Input Bias Current
Input Voltage
Open Loop Voltage Gain
Power Supply Rejection Ratio
Output Sink Current
Output Source Current
High Output Voltage
Low Output Voltage
Gain
Maximum Input Signal
Power Supply Rejection Ratio
Input Bias Current
Low Output Voltage
Symbol
VREF
ΔVREF
ΔVREF
ISC
f
Δf/ΔVCC
VOSC
IBIAS
VI(E>A)
GVO
PSRR
ISINK
ISOURCE
VOH
VOL
GV
VI(MAX)
PSRR
IBIAS
VOL
High Output Voltage
VOH
Rise Time
tR
Fall Time
tF
Start Threshold
VTH(ST)
Min. Operating Voltage (After Turn On)
VOPR(MIN)
Max. Duty Cycle
D(Max)
Min. Duty Cycle
D(MIN)
Start-Up Current
IST
Operating Supply Current
ICC(OPR)
Zener Voltage
VZ
Adjust VCC above the start threshould before setting at 15V
Note:
1. Parameter measured at trip point of latch
2. Gain defined as:
Conditions
TJ = 25℃, IREF = 1mA
12V ≤ VCC ≤ 25V
1mA ≤ IREF ≤ 20mA
TA = 25℃
TJ = 25℃
12V ≤ VCC ≤ 25V
CURRENT SENSE SECTION
Vpin1 = 2.5V
2V ≤ VO ≤ 4V (Note3)
12V ≤ VCC ≤ 25V (Note3)
Vpin2 = 2.7V, Vpin1 = 1.1V
Vpin2 = 2.3V, Vpin1 = 5V
Vpin2 = 2.3V, RL = 15kΩ to GND
Vpin2 = 2.7V, RL = 15kΩ to Pin 8
(Note 1 & 2)
Vpin1 = 5V(Note 1)
12V ≤ VCC ≤ 25V (Note 1,3)
ERROR AMPLIFIER SECTION
ISINK = 20mA
ISINK = 200mA
ISOURCE = 20mA
ISOURCE = 200mA
TJ = 25℃, CL= 1nF (Note 3)
TJ = 25℃, CL= 1nF (Note 3)
Vpin3=Vpin2=ON
ICC = 25mA
Min Typ Max Unit
4.9 5.0 5.1 V
6
20 mV
6
25 mV
-100 -180 mA
47 52 57 kHz
0.2
1
%
1.7
VP-P
-2 -10 μA
2.42 2.5 2.58 V
65 90
dB
60 70
dB
2
70
mA
-0.6 -1.0
mA
5
6
V
0.7 1.1 V
2.85 3 3.15 V/V
0.9 1 1.1 V
70
dB
-0.3 -2 μA
0.1 0.4 V
1.5 2.2 V
13 13.5
V
12 13.5
V
40 100 ns
40 100 ns
15 16 17
V
9
10 11
V
94 96 100 %
0
%
0.2 0.4 mA
11 17 mA
29
V
3. These parameters, although guaranteed, are not 100 tested in production.
2
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