CS2841B Datasheet, PDF (3/10 Pages) Cherry Semiconductor Corporation – Automotive Current Mode PWM Control Circuit

CS2841B
ELECTRICAL CHARACTERISTICS (−40°C ≤ T_A ≤ 85°C, R_T = 680 kW, C_T = 0.022 mF for Triangular Mode, V_CC = 15 V (Note 3),
R_T = 10 kW, C_T = 3.3 nF for Sawtooth Mode (see Figure 7); unless otherwise specified.)
Characteristic
Test Conditions
Min
Typ
Max
Unit
Reference Section
Output Voltage
Line Regulation
Load Regulation
Temperature Stability
T_J = 25°C, I_OUT = 1.0 mA
8.4 ≤ V_CC ≤ 16 V
1.0 ≤ I_OUT ≤ 20 mA
Note 4
4.9
5.0
5.1
V
−
6.0
20
mV
−
6.0
25
mV
−
0.2
0.4
mV/°C
Total Output Variation
Line, Load, Temp. Note 4
4.82
−
5.18
V
Output Noise Voltage
Long Term Stability
Output Short Circuit
Oscillator Section
10 Hz ≤ f ≤ 10 kHz, T_J = 25°C. Note 4
T_A = 125°C, 1000 Hrs. Note 4
T_A = 25°C
−
50
−
mV
−
5.0
25
mV
−30
−100
−180
mA
Initial Accuracy
Voltage Stability
Temperature Stability
Amplitude
Discharge Current
Error Amp Section
Sawtooth Mode: T_J = 25°C. See Figure 7.
47
52
57
kHz
Sawtooth Mode: −40°C ≤ T_A ≤ +85°C
44
52
60
kHz
Triangular Mode: T_J =25°C. See Figure 7.
44
52
60
kHz
8.4 ≤ V_CC ≤ 16 V
−
0.2
1.0
%
Sawtooth Mode: T_MIN ≤ T_A ≤ T_MAX. Note 4
−
5.0
−
%
Triangular Mode: T_MIN ≤ T_A ≤ T_MAX. Note 4
−
8.0
−
%
V_OSC (Peak to Peak)
−
1.7
−
V
T_J = 25°C
T_MIN ≤ T_A ≤ T_MAX
7.4
8.3
9.2
mA
7.2
−
9.4
mA
Input Voltage
Input Bias Current
A_VOL
Unity Gain Bandwidth
V_COMP = 2.5 V
V_FB = 0 V
2.0 ≤ V_OUT ≤ 4.0 V
Note 4
2.42
2.5
2.58
V
−
−0.3
−2.0
mA
65
90
−
dB
0.7
1.0
−
MHz
PSRR
Output Sink Current
Output Source Current
V_OUT High
V_OUT Low
Current Sense Section
8.4 V ≤ V_CC ≤ 16 V
V_FB = 2.7 V, V_COMP = 1.1 V
V_FB = 2.3 V, V_COMP = 5.0 V
V_FB = 2.3 V, R_L = 15 kW to Ground
V_FB = 2.7 V, R_L = 15 kW to V_REF
60
70
−
dB
2.0
6.0
−
mA
−0.5
−0.8
−
mA
5.0
6.0
−
V
−
0.7
1.1
V
Gain
Notes 5 and 6
2.85
3.0
3.15
V/V
Maximum Input Signal
V_COMP = 5.0 V. Note 5
PSRR
12 V ≤ V_CC ≤ 25 V. Note 5
Input Bias Current
V_Sense = 0 V
Delay to Output
T_J = 25°C. Note 4
3. Adjust V_CC above the start threshold before setting at 15 V
4. These parameters, although guaranteed, are not 100% tested in production
5. Parameter measured at trip point of latch with V_FB = 0
6. Gain defined as:
0.9
1.0
1.1
V
−
70
−
dB
−
−2.0
−10
mA
−
150
300
ns
A+
DVCOMP
DVSense
;
0v
VSense v
0.8
V.
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