UC384XBD MOTOROLA [Motorola, Inc], UC384XBD Datasheet - Page 13

• Manufacturer Part Number: UC384XBD
• Description: HIGH PERFORMANCE CURRENT MODE CONTROLLERS
• Manufacturer: MOTOROLA [Motorola, Inc]

MOTOROLA ANALOG IC DEVICE DATA
18k
4.7k
100
pF
0.01
T1 –
1.0nF
Primary: 45 Turns #26 AWG
Secondary 12 V: 9 Turns #30 AWG (2 Strands) Bifiliar Wound
Secondary 5.0 V: 4 Turns (six strands) #26 Hexfiliar Wound
Secondary Feedback: 10 Turns #30 AWG (2 strands) Bifiliar Wound
Core: Ferroxcube EC35–3C8
Bobbin: Ferroxcube EC35PCB1
Gap: 0.10” for a primary inductance of 1.0 mH
All outputs are at nominal load currents unless otherwise noted.
150k
Line Regulation: 5.0 V
Load Regulation: 5.0 V
Output Ripple:
Efficiency
33k
8(14)
4(7)
2(3)
1(1)
115 Vac
4.7
Test
EA
R
R
+
5.0 V
Osc
12 V
12 V
12 V
Bias
MDA
202
Figure 29. 7 W Off–Line Flyback Regulator
UC3844B, 45B UC2844B, 45B
V in = 115 Vac, I out = 1.0 A to 4.0 A
V in = 115 Vac, I out = 100 mA to 300 mA
V in = 115 Vac
V in = 115 Vac
V in = 95 Vac to 130 Vac
–
+
5(9)
5.0V Ref
+
Comp/Latch
Conditions
250
R
S
T
Q
+
–
7(12)
56k
7(11)
6(10)
5(8)
3(5)
100
L2, L3
4.7k
+
1N4937
1N4935 1N4935
L1
1N5819
68
22
470pF
= 50 mV or 0.5%
= 24 mV or 0.1%
= 300 mV or 3.0%
= 60 mV or 0.25%
– 15 H at 5.0 A, Coilcraft Z7156
– 25 H at 5.0 A, Coilcraft Z7157
1.0k
+
Results
40 mV pp
80 mV pp
3300
pF
47
70%
4N50
MTP
T1
680pF 2.7k
0.5
MUR110
MBR1635
MUR110
2200
1000
1000
+
+
+
1N4937
1000
L2
L1
L3
10
10
+
+
+
5.0V/4.0A
5.0V RTN
12V/0.3A
–12V/0.3A
12V RTN
13