CS3845B Просмотр технического описания (PDF) - ON Semiconductor
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CS3845B Datasheet PDF : 8 Pages
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Electrical Characteristics: 0≤TA≤70°C, VCC=15V; RT=10kΩ, CT=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
Total Output Variation
Output Noise Voltage
Long Term Stability
Output Short Circuit
TJ = 25°C, IREF=1mA
4.90
12 ≤ VCC ≤ 25V
1 ≤ IREF ≤ 20mA
(Note 1)
Line, Load, Temp. (Note 1)
4.82
10Hz ≤ f ≤ 10kHz, TJ = 25°C (Note 1)
TA = 125°C, 1000 Hrs. (Note 1)
TA = 25°C
–30
5.00
6
6
0.2
50
5
–100
5.10
20
25
0.4
5.18
25
–180
V
mV
mV
mV/°C
V
µV
mV
mA
s Oscillator Section
Initial Accuracy
Sawtooth Mode, TJ = 25°C
47
52
57
kHz
Voltage Stability
12 ≤ VCC ≤ 25V
0.2
1.0
%
Temperature Stability
Sawtooth Mode TMIN ≤ TA ≤ TMAX
(Note 1)
5
%
Amplitude
VOSC (peak to peak)(Note 1)
1.7
V
Discharge
TJ = 25°C; (Note 1)
TMIN ≤ TA ≤ TMAX (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
VOUT HIGH
VOUT LOW
VCOMP = 2.5V
VFB = 0V
2 ≤ VOUT ≤ 4V
(Note 1)
12 ≤ VCC ≤ 25V
VFB = 2.7V, VCOMP = 1.1V
VFB = 2.3V, VCOMP = 5V
VFB = 2.3V, RL15kΩ to Gnd
VFB = 2.7V, RL = 15kΩ to VREF
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)
VCOMP = 5V (Note 2)
12 ≤ VCC ≤ 25V (Note 2)
VSense = 0V
TJ = 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
ISINK = 20mA
ISINK = 200mA
ISOURCE = 20mA
ISOURCE = 200mA
TJ = 25°C, CL = 1nF (Note 1)
TJ = 25°C, CL = 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
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