CS3845B Datasheet, PDF (2/6 Pages) Cherry Semiconductor Corporation – Current Mode PWM Control Circuit with 50% Max Duty Cycle

Electrical Characteristics: 0≤T_A≤70˚C, V_CC=15V; R_T=10kΩ, C_T=3.3nF for sawtooth mode, unless otherwise stated
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNITS
s Reference Section
Output Voltage
Line Regulation
Load Regulation
Temperature Stability
T_J=25˚C, I_REF=1mA
12≤V_CC≤25V
1≤I_REF≤20mA
(Note 1)
4.90
5.00
5.10
V
6
20
mV
6
25
mV
0.2
0.4
mV/˚C
Total Output Variation
Line, Load, Temp. (Note 1)
4.82
5.18
V
Output Noise Voltage
Long Term Stability
Output Short Circuit
10Hz≤f≤10kHz, T_J=25˚C (Note 1)
T_A=125˚C, 1000 Hrs. (Note 1)
T_A=25˚C
-30
50
µV
5
25
mV
-100
-180
mA
s Oscillator Section
Initial Accuracy
Sawtooth Mode, T_J=25˚C
47
52
57
kHz
Voltage Stability
12≤V_CC≤25V
0.2
1.0
%
Temperature Stability
Sawtooth Mode T_MIN≤T_A≤T_MAX
(Note 1)
5
%
Amplitude
V_OSC (peak to peak)(Note 1)
17
V
Discharge
T_J=25°C; (Note 1)
T_MIN≤T_A≤T_MAX (Note 1)
7.5
8.3
9.3
mA
7.2
9.5
mA
s Error Amp Section
Input Voltage
Input Bias Current
AVOL
Unity Gain Bandwidth
PSRR
Output Sink Current
Output Source Current
V_OUT HIGH
V_OUT LOW
V_COMP=2.5V
V_FB=0V
2≤V_OUT≤4V
(Note 1)
12≤V_CC≤25V
V_FB=2.7V, V_COMP=1.1V
V_FB=2.3V, V_COMP=5V
V_FB=2.3V, R_L15kΩ to Gnd
V_FB=2.7V, R_L=15kΩ to V_REF
2.42
2.50
2.58
V
-0.3
-2.0
µA
65
90
dB
0.7
1.0
MHz
60
70
dB
2
6
mA
-0.5
-0.8
mA
5
6
V
0.7
1.1
V
s Current Sense Section
Gain
Maximum Input Signal
PSRR
Input Bias Current
Delay to Output
(Notes 2&3)
V_COMP=5V (Note 2)
12≤V_CC≤25V (Note 2)
V_Sense=0V
T_J=25˚C (Note 1)
2.85
3.00
3.15
V/V
0.9
1.0
1.1
V
70
dB
-2
-10
µA
150
300
ns
s Output Section
Output Low Level
Output High Level
Rise Time
Fall Time
I_SINK=20mA
I_SINK=200mA
I_SOURCE=20mA
I_SOURCE=200mA
T_J=25˚C, C_L=1nF (Note 1)
T_J=25˚C, C_L=1nF (Note 1)
0.1
0.4
V
1.5
2.2
V
13.0
13.5
V
12.0
13.5
V
50
150
ns
50
150
ns
2