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UC3847 参数 Datasheet PDF下载

UC3847图片预览
型号: UC3847
PDF下载: 下载PDF文件 查看货源
内容描述: 电流模式PWM控制器 [Current Mode PWM Controller]
分类和应用: 控制器
文件页数/大小: 10 页 / 644 K
品牌: TI [ TEXAS INSTRUMENTS ]
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UC1846/7  
UC2846/7  
UC3846/7  
(Unless otherwise stated, these specifications apply for TA=-55°C to +125°C for UC1846/7;  
-40°C to +85°C for the UC2846/7; and 0°C to +70°C for the UC3846/7; VIN=15V, RT=10k,  
CT=4.7nF, TA=TJ.)  
ELECTRICAL  
CHARACTERISTICS (cont.)  
UC1846/UC1847  
UC3846/UC3847  
PARAMETER  
TEST CONDITIONS  
UC2846/UC2847  
MIN. TYP. MAX. MIN. TYP. MAX. UNITS  
Oscillator Section  
Initial Accuracy  
TJ=25°C  
VIN=8V to 40V  
39  
43  
-1  
47  
2
39  
43  
-1  
47  
2
kHz  
%
%
V
Voltage Stability  
Temperature Stability  
Sync Output High Level  
Sync Output Low Level  
Sync Input High Level  
Sync Input Low Level  
Sync Input Current  
Error Amp Section  
Input Offset Voltage  
Input Bias Current  
Input Offset Current  
Common Mode Range  
Open Loop Voltage Gain  
Unity Gain Bandwidth  
CMRR  
Over Operating Range (Note 2)  
-1  
-1  
3.9  
3.9  
4.35  
2.3  
3.9  
3.9  
4.35  
2.3  
2.5  
2.5  
V
Pin 8=0V  
V
Pin 8=0V  
2.5  
1.5  
2.5  
1.5  
V
Sync Voltage=3.9V, Pin 8=0V  
1.3  
1.3  
mA  
0.5  
-0.6  
40  
5
-1  
0.5  
-0.6  
40  
10  
-2  
mV  
µA  
nA  
V
250  
VIN-2V  
250  
VIN=8V to 40V  
0
80  
0.7  
75  
80  
2
0
80  
0.7  
75  
80  
2
VIN-2V  
VO=1.2 to 3V, VCM=2V  
TJ=25°C (Note 2)  
105  
1.0  
100  
105  
6
105  
1.0  
100  
105  
6
dB  
MHz  
dB  
dB  
mA  
mA  
V
VCM=0V to 38V, VIN=40V  
VIN=8V to 40V  
PSRR  
Output Sink Current  
Output Source Current  
VID=-15mV to -5V, VPIN 7=1.2V  
VID=15mV to 5V, VPIN 7=2.5V  
-0.4  
4.3  
-0.5  
4.6  
0.7  
-0.4  
4.3  
-0.5  
4.6  
0.7  
High Level Output Voltage RL=(Pin 7) 15kΩ  
Low Level Output Voltage  
1
1
V
Current Sense Amplifier Section  
Amplifier Gain  
VPIN 3=0V, Pin 1 Open (Notes 3 & 4)  
2.5  
1.1  
2.75  
3.0  
2.5  
1.1  
2.75  
3.0  
V
Maximum Differential Input Pin 1 Open (Note 3)  
Signal (VPIN 4-VPIN 3)  
Input Offset Voltage  
CMRR  
RL (Pin 7)=15kW  
1.2  
5
1.2  
5
V
mV  
dB  
dB  
µA  
µA  
V
VPIN 1=0.5V, Pin 7 Open (Note 3)  
VCM=1V to 12V  
25  
25  
60  
60  
83  
60  
60  
83  
PSRR  
VIN=8V to 40V  
84  
84  
Input Bias Current  
Input Offset Current  
Input Common Mode Range  
Delay to Outputs  
VPIN 1=0.5V, Pin 7 Open (Note 3)  
VPIN 1=0.5V, Pin 7 Open (Note 3)  
-2.5  
0.08  
-10  
1
-2.5  
0.08  
-10  
1
0
VIN-3  
500  
0
VIN-3  
500  
TJ=25°C, (Note 2)  
200  
200  
ns  
Current Limit Adjust Section  
Current Limit Offset  
VPIN 3=0V, VPIN 4=0V, Pin 7 Open  
(Note 3)  
0.45  
0.5  
-10  
0.55  
-30  
0.45  
0.5  
-10  
0.55  
-30  
V
Input Bias Current  
Shutdown Terminal Section  
Threshold Voltage  
VPIN 5=VREF, VPIN 6=0V  
µA  
250  
0
350  
1.5  
400  
VIN  
250  
0
350  
1.5  
400  
VIN  
mV  
V
Input Voltage Range  
Minimum Latching Current (Note 6)  
(IPIN 1)  
3.0  
3.0  
mA  
3