CS3842B Datasheet, PDF (2/6 Pages) Cherry Semiconductor Corporation – Off-Line Current Mode PWM Control Circuit Off-Line Current Mode PWM Control Circuit

Electrical Characteristics: 0≤T_A≤70˚C, V_CC=15V (Note 1); R_T=680Ω, C_T=.022µF for triangular mode,
R_T=10kΩ, C_T=3.3nF for sawtooth mode (see Fig. 3), unless otherwise stated
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
s Reference Section
Output Voltage
Line Regulation
Load Regulation
Temperature Stability
Total Output Variation
Output Noise Voltage
Long Term Stability
Output Short Circuit
T_J=25˚C, I_OUT=1mA
12≤V_IN≤25V
1≤I_OUT≤20mA
(Note 2)
Line, Load, Temperature (Note 2)
10Hz≤f≤10kHz, T_J=25˚C (Note 2)
T_A=125˚C, 1kHrs. (Note 2)
T_A=25˚C
4.90
5.00
5.10
6
20
6
25
0.2
0.4
4.82
5.18
50
5
25
-30
-100
-180
s Oscillator Section
Initial Accuracy
Voltage Stability
Temp. Stability
Amplitude
Discharge Current
Sawtooth Mode (see Fig. 3), T_J=25˚C
Triangular Mode (see Fig. 3), T_J=25˚C
12≤V_CC≤25V
Sawtooth Mode T_MIN≤T_A≤T_MAX
(Note 2)
Triangular Mode T_MIN≤T_A≤T_MAX
(Note 2)
Oscillator peak to peak
T_J=25˚C
T_MIN≤T_A≤T_MAX
47
52
57
44
52
60
0.2
1.0
5
8
1.7
7.5
8.3
9.3
7.2
9.5
s Error Amp Section
Input Voltage
Input Bias Current
A_VOL
Unity Gain Bandwidth
PSRR
Output Sink Current
Output Source Current
V_OUT High
V_OUT Low
V_COMP=2.5V
2≤V_OUT≤4V
(Note 2)
12≤V_CC≤25V
V_FB=2.7V, V_OSC=1.1V
V_FB=2.3V, V_OSC=5V
V_FB=2.3V, R_L=15kΩ to ground
V_FB=2.7V, R_L=15kΩ to V_REF
2.42
2.50
2.58
-0.3
-2.0
65
90
0.7
1.0
60
70
2
6
-0.5
-0.8
5
6
0.7
1.1
s Current Sense Section
Gain
Maximum Input Signal
PSRR
Input Bias Current
Delay to Output
(Notes 3 & 4)
V_COMP=5V (Note 3)
12≤V_CC≤25V (Note 3)
T_J=25˚C (Note 2)
2.85
3.00
3.15
0.9
1.0
1.1
70
-2
-10
150
300
s Output Section
Output Low Level
Output High Level
I_SINK=20mA
I_SINK=200mA
I_SOURCE=20mA
I_SOURCE=200mA
0.1
0.4
1.5
2.2
13.0
13.5
12.0
13.5
UNITS
V
mV
mV
mV/˚C
V
µV
mV
mA
kHz
kHz
%
%
%
V
mA
mA
V
µA
dB
MHz
dB
mA
mA
V
V
V/V
V
dB
µA
ns
V
V
V
V
2