TOP200YAI Power Integrations, TOP200YAI Datasheet - Page 7

• Manufacturer Part Number: TOP200YAI
• Description: IC OFFLINE SWIT PWM OCP HV TO220
• Manufacturer: Power Integrations
• Series: TOPSwitch®r
• Type: Off Line Switcherr

Specifications of TOP200YAI

• Output Isolation: Either
• Frequency Range: 90 ~ 110kHz
• Voltage - Output: 700V
• Power (watts): 12W
• Operating Temperature: -40°C ~ 150°C
• Package / Case: TO-220-3
• Output Voltage: 5.8 V
• Input / Supply Voltage (max): 265 VAC
• Input / Supply Voltage (min): 85 VAC
• Duty Cycle (max): 70 %
• Switching Frequency: 100 KHz
• Supply Current: 1.2 mA
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Figure 8. Schematic Diagram of a 15 W Universal Input Power Supply Utilizing the TOP202 and Simple Optocoupler Feedback.
Simple Optocoupler Feedback
The circuit shown in Figure 8 is a 7.5 V,
15 W secondary regulated flyback power
supply using the TOP202 that will
operate from 85 to 265 VAC input
voltage.
accuracy and regulation over the circuit
of Figure 7 is achieved by using an
optocoupler and secondary referenced
Zener diode. The general operation of
the power stage of this circuit is the same
as that described for Figure 7.
The input voltage is rectified and filtered
by BR1 and C1. L2, C6 and C7 reduce
conducted emission currents. The bias
winding is rectified and filtered by D3
and C4 to create a typical 11 V bias
voltage. Zener diode (VR2) voltage
together with the forward voltage of the
LED in the optocoupler U2 determine
the output voltage. R1, the optocoupler
J1
N
L
22 mH
L2
3.15 A
0.1 F
F1
Improved output voltage
C6
TOP202YAI
400 V
BR1
U1
CONTROL
SOURCE
DRAIN
33 F
400 V
C1
current transfer ratio, and the TOPSwitch
control current to duty cycle transfer
function set the DC control loop gain.
C5 together with the control pin dynamic
impedance and capacitor ESR establish
a control loop pole-zero pair. C5 also
determines the auto-restart frequency
and filters internal gate drive switching
currents. R2 and VR2 provide minimum
current loading when output current is
low. See DN-11 for more information
regarding the use of the TOP202 in a
low-cost, 15 W universal power supply.
Accurate Optocoupler Feedback
The circuit shown in Figure 9 is a highly
accurate, 15 V, 30 W secondary-
regulated flyback power supply that will
operate from 85 to 265 VAC input
voltage.
directly senses and accurately regulates
the output voltage. The effective output
ST202A REFERENCE DESIGN BOARD
P6KE150
UF4005
47 F
VR1
C5
D1
A TL431 shunt regulator
T1
UG8BT
1N4148
680 F
D2
25 V
D3
C2
NEC2501
0.1 F
C4
39
U2
R1
1N5234B
voltage can be fine tuned by adjusting
the resistor divider formed by R4 and
R5. Other output voltages are possible
by adjusting the transformer turns ratios
as well as the divider ratio.
The general operation of the input and
power stages of this circuit are the same
as that described for Figures 7 and 8. R3
and C5 tailor frequency response. The
TL431 (U2) regulates the output voltage
by controlling optocoupler LED current
(and TOPSwitch duty cycle) to maintain
an average voltage of 2.5 V at the TL431
input pin. Divider R4 and R5 determine
the actual output voltage. C9 rolls off
the high frequency gain of the TL431 for
stable operation. R1 limits optocoupler
LED current and determines high
frequency loop gain.
information, refer to application note
AN-14.
6.2 V
VR2
68
R2
1 nF
C7
Y1
CIRCUIT PERFORMANCE:
3.3 H
Meets CISPR-22 Class B
Line Regulation - ±0.5%
Ripple Voltage ± 50 mV
L1
Load Regulation - ±1%
TOP200-4/14
(85-265 VAC)
(10 -100%)
120 F
25 V
C3
PI-1695-112895
For more
7/96
D
7.5 V
RTN
7