CS2841B Datasheet, PDF (2/6 Pages) Cherry Semiconductor Corporation – Automotive Current Mode PWM Control Circuit

Electrical Characteristics: d -40≤T_A≤85˚C R_T=680kΩ, C_T=0.022µF for triangular mode, V_CC=15V (Note 1),
R_T=10kΩ, C_T=3.3nF for sawtooth mode (See Fig. 3), unless otherwise stated.
PARAMETER
TEST CONDITIONS
MIN
TYP
s Reference Section
Output Voltage
Line Regulation
Load Regulation
Temperature Stability
T_J=25˚C, I_OUT=1mA
8.4≤V_CC≤16V
1≤I_OUT≤20mA
(Note 2)
4.90
5.00
6
6
0.2
Total Output Variation
Line, Load, Temp. (Note 2)
4.82
Output Noise Voltage
10Hz≤f≤10kHz, T_J=25˚C (Note 2)
50
Long Term Stability
T_A=125˚C, 1000 Hrs. (Note 2)
5
Output Short Circuit
T_A=25˚C
-30
-100
MAX
UNIT
5.10
V
20
mV
25
mV
0.4
mV/˚C
5.18
V
µV
25
mV
-180
mA
s Oscillator Section
Initial Accuracy
Voltage Stability
Sawtooth Mode: (See Fig. 3)T_J=25˚C
47
52
Sawtooth Mode: -40˚C≤T_A≤+85˚
44
52
Triangular Mode (See Fig. 3) T_J=25˚C 44
52
8.4V≤Vcc≤16V
0.2
Temperature Stability
Sawtooth Mode T_MIN≤T_A≤T_MAX
5
Triangular Mode T_MIN≤T_A ≤T_MAX
8
(Note 2)
Amplitude
Discharge current
V_OSC (peak to peak)
T_J=25˚C
T_MIN≤T_A≤T_MAX
1.7
7.4
8.3
7.2
57
kHz
60
kHz
60
kHz
1.0
%
%
%
V
9.2
mA
9.4
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=0V
2≤V_OUT≤4V
(Note 2)
8.4V≤V_CC≤16V
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
2.42
2.50
-0.3
65
90
0.7
1.0
60
70
2
6
-0.5
-0.8
5
6
0.7
2.58
V
-2.0
µA
dB
MHz
dB
mA
mA
V
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)
12V≤V_CC≤25V (Note 3)
V_Sense=0V
T_J=25˚C (Note 2)
Notes: 1. Adjust V_cc above the start threshold before setting at 15V.
2.These parameters, although guaranteed, are not 100% tested in production.
2.85
3.00
0.9
1.0
70
-2
150
3.15
V/V
1.1
V
dB
-10
µA
300
ns
3. Parameter measured at trip point of latch with V_FB=0.
4. Gain defined as:
∆V_COMP
A = _∆VSense ; 0 ≤ V_Sense ≤ 0.8V.
2