CS2842A Datasheet, PDF (2/6 Pages) Cherry Semiconductor Corporation – Off-Line Current Mode PWM Control Circuit with Undervoltage Lockout

Electrical Characteristics: -25° ≤ T_A ≤ 85˚C for CS2842A/2843A, 0° ≤ T_A ≤ 70˚C for CS3842A/3843A. 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 Figure 3), unless otherwise stated.
PARAMETER
s Reference Section
Output Voltage
Line Regulation
Load Regulation
Temperature Stability
Total Output Variation
Output Noise Voltage
Long Term Stability
Output Short Circuit
TEST CONDITIONS
CS2842A/CS2843A CS3842A/CS3843A
MIN TYP MAX MIN TYP MAX UNITS
T_J = 25˚C, I_OUT = 1mA
12 ≤ V_IN ≤ 25V
1 ≤ I_OUT ≤ 20mA
(Note 2)
4.95 5.00 5.05 4.90 5.00 5.10 V
6
20
6
20 mV
6
25
6
25 mV
0.2 0.4
0.2 0.4 mV/˚C
Line, Load, Temp. (Note 2)
4.90
5.10 4.82
5.18 V
10Hz ≤ f ≤ 10kHz, T_J = 25˚C (Note 2)
T_A = 125˚C, 1kHrs. (Note 2)
T_A = 25˚C
-30
50
5
25
-100 -180 -30
50
µV
5
25 mV
-100 -180 mA
s Oscillator Section
Initial Accuracy
Voltage Stability
Temp. Stability
Amplitude
Discharge Current
Sawtooth Mode (see Fig. 3), T_J = 25˚C 47
Triangular Mode (see Fig. 3), T_J = 25˚C 47
12 ≤ V_CC ≤ 25V
Sawtooth Mode T_MIN ≤ T_A ≤ T_MAX
(Note 2)
Triangular Mode T_MIN ≤ T_A ≤ T_MAX
(Note 2)
52 57 47
52 57 44
0.2 1.0
5
8
52 57 kHz
52 60 kHz
0.2 1.0 %
5
%
8
%
OSC peak to peak
1.7
1.7
V
T_J = 25˚C
T_MIN ≤ T_A ≤ T_MAX
7.5 8.3 9.3 7.5 8.3 9.3 mA
7.2
9.5 7.2
9.5 mA
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
V_FB = 0
2 ≤ V_OUT ≤ 4V
(Note 2)
12 ≤ V_CC ≤ 25V
V_FB = 2.7V, V_COMP = 1.1V
V_FB = 2.3V, V_COMP = 5V
V_FB = 2.3V, R_L = 15kΩ to ground
V_FB = 2.7V, R_L = 15kΩ to V_REF
2.45 2.50 2.55 2.42 2.50 2.58 V
-0.3 -1.0
-0.3 -2.0 µA
65 90
65 90
dB
0.7 1.0
0.7 1.0
MHz
60 70
60 70
dB
2
6
2
6
mA
-0.5 -0.8
-0.5 -0.8
mA
5
6
5
6
V
0.7 1.1
0.7 1.1 V
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)
V_Sense = 0
T_J = 25˚C (Note 2)
2.85 3.00 3.15 2.85 3.00 3.15 V/V
0.9 1.0 1.1 0.9 1.0 1.1 V
70
70
dB
-2 -10
-2 -10 µA
150 300
150 300 ns
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
0.1 0.4 V
1.5 2.2 V
13.0 13.5
V
12.0 13.5
V
2