LT1246 查看數據表（PDF） - Linear Technology
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LT1246 Datasheet PDF : 12 Pages
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TYPICAL PERFOR A CE CHARACTERISTICS
LT1246/LT1247
Feedback Pin Input Voltage
2.55
2.54
2.53
2.52
2.51
2.50
2.49
2.48
2.47
2.46
2.45
–50 –25 0
25 50 75 100 125
TEMPERATURE (°C)
LT1246 • TPC10
Current Sense Clamp Voltage
1.05
1.04
1.03
1.02
1.01
1.00
0.99
0.98
0.97
0.96
0.95
–50 –25 0
25 50 75 100 125
TEMPERATURE (°C)
LT1246 • TPC11
High Level Output
Saturation Voltage
4.0
3.5
3.0
2.5
2.0
1.5
1.0
TJ = – 55°C
TJ = 25°C
TJ = 125°C
0.5
0
0
100
200
OUTPUT SOURCE CURRENT (mA)
LT1246 • TPC12
Low Level Output
Saturation Voltage
1.0
TJ = 125°C
0.5
TJ = 25°C
TJ = – 55°C
0
0
100
200
OUTPUT SINK CURRENT (mA)
LT1246 • TPC13
Low Level Output Saturation Voltage
During Undervoltage Lockout
4.0
3.5
3.0
2.5
TJ = – 55°C
2.0
1.5
1.0
TJ = 125°C
TJ = 25°C
0.5
0
0
5
10
OUTPUT SINK CURRENT (mA)
LT1246 • TPC14
Supply Current vs
Oscillator Frequency
14
13
12
11
10
9
10k
100k
1M
OSCILLATOR FREQUENCY (Hz)
LT1246 • TPC15
Error Amplifier Open-Loop Gain
and Phase
100
225
80
GAIN
180
Current Sense Input Threshold
1.2
1.0
60
135
0.8
PHASE
TJ = – 55°C
40
90
0.6
TJ =125°C
20
45
0.4
0
0
–20
10 100
–45
1k 10k 100k 1M 10M
FREQUENCY (Hz)
LT1246 • TPC16
0.2
TJ = 25°C
0
01
2
3
4
5
6
ERROR AMP OUTPUT VOLTAGE (V)
LT1246 • TPC17
5
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