UCC28521_16 Datasheet, PDF (24/34 Pages) Texas Instruments – ADVANCED PFC/PWM COMBINATION CONTROLLER

UCC28521, UCC28528
SLUS608D − JANUARY 2005 REVISED NOVEMBER 2005
TYPICAL CHARACTERISTICS
GT1 RISE/FALL TIME
vs
C_LOAD AND R_SERIES (V_CC = 12 V)
45
40
tR: RSERIES = 2 Ω
35
tF: RSERIES = 2 Ω
30
25
tR: RSERIES = 10 Ω
20
tF: RSERIES = 10 Ω
12
10
5
0
0
2
4
6
CLOAD − nF
Figure 17
GT1, GT2 RISE AND FALL TIMES
vs
TEMPERATURE
18
16
tR
14
12
10
tF
8
6
4
2
0
−50 −25 0
25 50 75 100 125
Temperature − °C
Figure 18
GT2 MAXIMUM DUTY CYCLE
vs
D_MAX VOLTAGE
100
100 kHz
90
80
200 kHz
70
500 kHz
60
50
800 kHz
40
30
20
10
0
1.0 1.5
2 2.5 3.0 3.5 4.0 4.5
D_MAX Voltage − V
Figure 19
5.0 5.5
MULTIPLIER OUTPUT CURRENT
vs
VOLTAGE ERROR AMPLIFIER OUTPUT
350
300
IAC = 150 µA
350
VFF = 1.4 V
200
IAC = 300 µA
VFF = 2.8 V
150
100
50
IAC = 500 µA
VFF = 4.7 V
0
1.0
2.0
4.0
6.0
VAOUT − Voltage Error Amplifier Output − V
Figure 20
24
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