IP5560C Datasheet, PDF (7/7 Pages) Seme LAB – SWITCHED.MODE POWER SUPPLY CONTROL CIRCUIT

IP5560C
IP5560C
TYPICAL PERFORMANCE CHARACTERISTICS — ERROR AMPLIFIER
Soft Start Min. Duty Cycle vs
R₁ + R₂
80
δ max = 90%
70
60
δ max = 70%
50
40 ^{δ max = 50%}
30
δ max = 30%
20
10
0
1
10
R₁ + R₂ ^(kΩ)
Current Fed
Dropping Resistor
V_S
R_{VC C}
1
V_{C C}
GND
16
R_VCC =
V_S – V_CC
(10 to 20 mA)
See DC Electrical Characteristics For
Current Feed V_CC Range
30
Graph for Determining δ max
100
90
80
70
R₁
60
50
40
R₂
30
20
10
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
R₂
R₁ + R₂
Semelab plc. Telephone [phone]. Fax [phone].
E-mail: [e-mail] Website: http://www.semelab.co.uk
2 V_Z
DUTY
6 CYCLE
CONTROL
12
Prelim. 4/95