UC2844/45
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
Timing Resistor vs. Oscillator Frequency
Output Deadtime vs. Oscillator Frequency
1.0nF
75
70
100
50
VCC = 15V
TA = 25℃
2.0nF
5.0nF
20
65
60
55
50
CT = 10nF
10
5.0
2.0
1.0
Note: Output Switches At
One-Half The Oscillator
Frequency
100pF
200pF
500pF
10k
20k
50k
100k 200k
500k 1.0M
10k
20k
50k
100k 200k
500k 1.0M
Oscillator Frequency, IOSC (Hz)
Oscillator Frequency, IOSC (Hz)
Current Sense Input Threshold vs. Error Amp
Output Voltage
Error Amp Open Loop Gain Phase vs. Frequency
VCC = 15V
1.2
1.0
0.8
100
80
0
VOUT = 2.0V ~ 4.0V
30
RL = 100k
TA = 25℃
Gain
TA = 125℃
TA = 25℃
60
60
40
20
90
0.6
0.4
Phase
120
TA = -55℃
0
150
180
0.2
0
VCC = 15V
-20
10
100
1.0k
10k
100k
1.0M 10M
0
2.0
4.0
6.0
8.0
Error Amp Output Voltage, VOUT (V)
Frequency, f (Hz)
UNISONIC TECHNOLOGIES CO., LTD
6 of 7
Ver.A
www.unisonic.com.tw
UTC [ Unisonic Technologies ]
