U3525 Datasheet, PDF (9/9 Pages) Unisonic Technologies – REGULATING PWM IC

U3525
TYPICAL CHARACTERISTICS
Oscillator Charge Time vs. R_T and C_T
50
20
10
R_D=0
5
6 5 _RD7
2
RT
CT
1
2 5 10 20 50 100 2005001ms2ms
T (μs)
Output Saturation Characteristics
3
VIN=20V
Tamb=25℃
2
1
0
0.01
SOURCE SAT,VC-VOH
SINK SAT, V_OL
0.1
I_OUT (A)
LINEAR INTEGRATED CIRCUIT
Oscillator DisCharge Time vs. R_D and C_T
400
300
200
100
0
0.5 1 2
5 10 20 50
T (μs)
Error Amplifier Voltage Gain and Phase vs. Frequency
80 ^RL^=∞
1MΩ
60 _300kΩ
100kΩ
40 30kΩ
V IN=20V
Values below 30kΩ
20 _{will begin to limit the}
maximum duty cycle
0
PHASE
100 1k 10k 100k 1M
-180°
-270°
-360°
f (Hz)
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exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R103-032,A