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参数资料
| 型号： | KA3842ACS |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 3/6页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR PWM CM 8-DIP |
| 标准包装： | 50 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 500kHz |
| 占空比： | 100% |
| 电源电压： | 10 V ~ 30 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 包装： | 管件 |
Absolute Maximum Ratings
The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed.
The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics
tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will
define the conditions for actual device operation.
Symbol
V CC
I O
V I(ANA)
I SINK(EA)
P D
Parameter
Supply Voltage
Output Current
Analog Inputs (Pins 2, 3)
Error Amp. Output Sink Current
Power Dissipation
Value
30
±1
-0.3 to 6.3
10
1
Unit
V
A
V
mA
W
R θ ja
Thermal Resistance, Junction-to-Air
(4)
95
°C/W
Electrical Characteristics
(V CC = 15V, R T = 10k?, C T = 3.3nF, T A = 0°C to +70°C, unless otherwise specified)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
REFERENCE SECTION
V REF
Δ V REF
I SC
Output Voltage
Line Regulation
Load Regulation
Output Short Circuit
T J = 25°C, I O = 1mA
V CC = 12V to 25V
I O = 1mA to 20mA
T A = 25°C
4.9
–
–
–
5.0
6
6
-100
5.1
20
25
-180
V
mV
mV
mA
OSILLATOR SECTION
F OSC
ST V
V OSC
I DISCHG
Initial Accuracy
Voltage Stability
Amplitude
Discharge Current
T J = 25°C
V CC = 12V to 25V
V PIN4 , Peak to Peak
T J = 25°C, Pin 4 = 2V
47
–
–
7.8
52
0.2
1.7
8.3
57
1
–
8.8
kHz
%
V
mA
CURRENT SENSE SECTION
G V
Gain (2)(3)
2.85
3
3.15
V/V
V I(MAX)
PSRR
Maximum Input
PSRR (1)(2)
Signal (2)
V PIN1 = 5V
V CC = 12V to 25V
0.9
–
1.0
70
1.1
–
V
dB
I BIAS
Input Bias Current
–
-2
-10
μA
T D
Delay to Output (1)
V PIN3 = 0 V to 2V
–
100
200
ns
ERROR AMPLIFIER SECTION
Unity Gain Bandwidth
V I
I BIAS
G VO
GBW
PSRR
I SINK
I SOURCE
V OH
V OL
Input Voltage
Input Bias Current
Open Loop Gain (1)
(1)
PSRR (1)
Output Sink Current
Output Source Current
Output High Voltage
Output Low Voltage
T PIN1 = 2.5V
V O = 2V to 4V
T J = 25°C
V CC = 12V to 25V
V PIN2 = 2.7V
V PIN1 = 1.1V
V PIN2 = 2.3V
V PIN1 = 5.0V
V PIN2 = 2.3V, R1 = 15k? to GND
V PIN2 = 2.7V
R1 = 15k? to Pin 8
2.42
–
65
0.7
60
2
-0.5
5
–
2.50
-0.3
90
1
70
6
-0.8
6
0.8
2.58
-2
–
–
–
–
–
–
1.1
V
μA
dB
MHz
dB
mA
mA
V
V
KA3842AC/KA3842AE Rev. 1.0.1
3
www.fairchildsemi.com
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