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CS2841B Datasheet(PDF) 2 Page - Cherry Semiconductor Corporation

No. de pieza CS2841B
Descripción Electrónicos  Automotive Current Mode PWM Control Circuit
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Fabricante Electrónico  CHERRY [Cherry Semiconductor Corporation]
Página de inicio  http://www.cherrycorp.com/
Logo CHERRY - Cherry Semiconductor Corporation

CS2841B Datasheet(HTML) 2 Page - Cherry Semiconductor Corporation

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Electrical Characteristics: d -40≤TA≤85˚C RT=680kΩ, CT=0.022µF for triangular mode, VCC=15V (Note 1),
RT=10kΩ, CT=3.3nF for sawtooth mode (See Fig. 3), unless otherwise stated.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Notes:
1. Adjust Vcc above the start threshold before setting at 15V.
3. Parameter measured at trip point of latch with VFB=0.
2.These parameters, although guaranteed, are not 100% tested in production.
4. Gain defined as:
A =
; 0 ≤ VSense ≤ 0.8V.
∆VCOMP
∆VSense
s
Reference Section
Output Voltage
TJ=25˚C, IOUT=1mA
4.90
5.00
5.10
V
Line Regulation
8.4≤VCC≤16V
6
20
mV
Load Regulation
1≤IOUT≤20mA
6
25
mV
Temperature Stability
(Note 2)
0.2
0.4
mV/˚C
Total Output Variation
Line, Load, Temp. (Note 2)
4.82
5.18
V
Output Noise Voltage
10Hz≤f≤10kHz, TJ=25˚C (Note 2)
50
µV
Long Term Stability
TA=125˚C, 1000 Hrs. (Note 2)
5
25
mV
Output Short Circuit
TA=25˚C
-30
-100
-180
mA
s
Oscillator Section
Initial Accuracy
Sawtooth Mode: (See Fig. 3)TJ=25˚C
47
52
57
kHz
Sawtooth Mode: -40˚C≤TA≤+85˚
44
52
60
kHz
Triangular Mode (See Fig. 3) TJ=25˚C
44
52
60
kHz
Voltage Stability
8.4V≤Vcc≤16V
0.2
1.0
%
Temperature Stability
Sawtooth Mode TMIN≤TA≤TMAX
5%
Triangular Mode TMIN≤TA ≤TMAX
8%
(Note 2)
Amplitude
VOSC (peak to peak)
1.7
V
Discharge current
TJ=25˚C
7.4
8.3
9.2
mA
TMIN≤TA≤TMAX
7.2
9.4
mA
s
Error Amp Section
Input Voltage
VCOMP=2.5V
2.42
2.50
2.58
V
Input Bias Current
VFB=0V
-0.3
-2.0
µA
AVOL
2≤VOUT≤4V
65
90
dB
Unity Gain Bandwidth
(Note 2)
0.7
1.0
MHz
PSRR
8.4V≤VCC≤16V
60
70
dB
Output Sink Current
VFB=2.7V, VCOMP=1.1V
2
6
mA
Output Source Current
VFB=2.3V, VCOMP=5V
-0.5
-0.8
mA
VOUT High
VFB=2.3V, RL=15kΩ to ground
5
6
V
VOUT Low
VFB=2.7V, RL=15kΩ to VREF
0.7
1.1
V
s
Current Sense Section
Gain
(Notes 3 & 4)
2.85
3.00
3.15
V/V
Maximum Input Signal
VCOMP=5V (Note 3)
0.9
1.0
1.1
V
PSRR
12V≤VCC≤25V (Note 3)
70
dB
Input Bias Current
VSense=0V
-2
-10
µA
Delay to Output
TJ=25˚C (Note 2)
150
300
ns


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