Datasheet

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13
12
Q2
Q1
+V
C
A
B
UC1525A
GND
+V
SUPPLY
Return
R1
30 W
R2
C1
T1
11
14
D1, D2: UC3611
C2
V
REF
R
T
C
T
16
Q1
Q5 Q8
7.4 kW
Q36
5
Q6 Q9
2 kW
14 kW
Ramp To PWM
Blanking To Outout
Q12
Q10 Q11
Q13
3 kW 250 kW
Clock
Q14
25 kW
1 kW
2 kW
400 mA
5 pF
Q7
Q4
Q2
1 kW
3
7
12
SYNC
DISCHARGE
GND
23 kW
UC1525A, UC1527A
UC2525A, UC2527A
UC3525A, UC3527A
SLUS191C – FEBRUARY 1997 – REVISED JANUARY 2008
PRINCIPLES OF OPERATION AND TYPICAL CHARACTERISTICS (continued)
Figure 6. Low Power Transformers
Low power transformers can be driven by the UC1525A. Automatic reset occurs during dead time, when both
ends of the primary winding are switched to ground.
Figure 7. UC1525A Oscillator Schematic
8 Submit Documentation Feedback Copyright © 1997 – 2008, Texas Instruments Incorporated
Product Folder Link(s): UC1525A, UC1527A UC2525A, UC2527A UC3525A, UC3527A