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UC3844 参数 Datasheet PDF下载

UC3844图片预览
型号: UC3844
PDF下载: 下载PDF文件 查看货源
内容描述: 高性能电流模式控制器 [HIGH PERFORMANCE CURRENT MODE CONTROLLERS]
分类和应用: 控制器
文件页数/大小: 14 页 / 380 K
品牌: MOTOROLA [ MOTOROLA ]
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UC3844, 45 UC2844, 45  
Figure 1. Timing Resistor versus  
Oscillator Frequency  
Figure 2. Output Deadtime versus  
Oscillator Frequency  
100  
50  
75  
70  
65  
V
T
= 15 V  
= 25°C  
CC  
A
1.0 nF  
2.0 nF  
20  
5.0 nF  
C
= 10 nF  
T
10  
60  
55  
50  
5.0  
2.0  
100 pF  
200 pF  
NOTE: Output switches  
at one–half the oscillator  
frequency.  
500 pF  
1.0  
10 k  
20 k  
50 k  
100 k  
200 k  
500 k  
1.0 M  
10 k  
20 k  
50 k  
100 k  
200 k  
500 k  
1.0 M  
f
, OSCILLATOR FREQUENCY (Hz)  
f
osc  
, OSCILLATOR FREQUENCY (Hz)  
osc  
Figure 3. Error Amp Small Signal  
Transient Response  
Figure 4. Error Amp Large Signal  
Transient Response  
V
= 15 V  
= –1.0  
V
= 15 V  
CC  
CC  
A = –1.0  
V
A
V
A
2.55 V  
3.0 V  
2.5 V  
2.0 V  
T
= 25  
°C  
T = 25°C  
A
2.5 V  
2.45 V  
0.5  
µs/DIV  
1.0 µs/DIV  
Figure 5. Error Amp Open Loop Gain and  
Phase versus Frequency  
Figure 6. Current Sense Input Threshold  
versus Error Amp Output Voltage  
100  
80  
60  
40  
20  
1.2  
0
V
V
R
= 15 V  
= 2.0 V to 4.0 V  
= 100 K  
CC  
O
L
V
= 15 V  
CC  
1.0  
0.8  
0.6  
0.4  
0.2  
0
30  
Gain  
T
= 25°C  
A
60  
T
= 25°C  
A
90  
T
= 125°C  
Phase  
1.0 M  
A
T
= –55  
4.0  
°C  
120  
A
0
150  
180  
– 20  
10  
100  
1.0 k  
10 k  
100 k  
10 M  
0
2.0  
6.0  
8.0  
f, FREQUENCY (Hz)  
V
, ERROR AMP OUTPUT VOLTAGE (V)  
O
4
MOTOROLA ANALOG IC DEVICE DATA  
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