RDK-91 Power Integrations, RDK-91 Datasheet - Page 17

• Manufacturer Part Number: RDK-91
• Description: KIT DESIGN REF TINYSWITCH-III
• Manufacturer: Power Integrations
• Series: TinySwitch®-IIIr

Specifications of RDK-91

• Main Purpose: AC/DC, Primary Side
• Outputs And Type: 1, Non-Isolated
• Power - Output: 12W
• Voltage - Output: 12V
• Current - Output: 1A
• Voltage - Input: 85 ~ 265VAC
• Regulator Topology: Flyback
• Board Type: Fully Populated
• Utilized Ic / Part: TNY274, TNY275, TNY276, TNY277, TNY278, TNY279, TNY280
• Product: Accessories & Kits
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency - Switching: -
• Other names: 596-1194

8 Transformer Spreadsheet
ENTER APPLICATION VARIABLES
VACMIN
VACMAX
fL
VO
IO
Power
n
Z
tC
CIN
ENTER TinySwitch-III VARIABLES
TinySwitch-III
Chosen Device
Chose Configuration
ILIMITMIN
ILIMITTYP
ILIMITMAX
fSmin
I^2fmin
VOR
VDS
VD
KP
KP_TRANSIENT
ENTER BIAS WINDING VARIABLES
VB
NB
VZOV
UVLO VARIABLES
V_UV_TARGET
V_UV_ACTUAL
RUV_IDEAL
RUV_ACTUAL
ENTER TRANSFORMER CORE/CONSTRUCTION VARIABLES
Core Type
Core
Bobbin
AE
LE
AL
Page 17 of 37
ACDC_TinySwitch-III
_011906; Rev.0.27;
Integrations 2006
Copyright Power
TNY278
STD
EE25
INPUT
101.00
12.00
28.80
1.00
0.71
0.50
3.00
265
85
50
92
TNY278
INFO
EE25
EE25_BOBBIN
TNY278
Standard
Current Limit
EE25
OUTPUT
124000 Hertz
35.937 A^2kHz
0.512 Amps
0.550 Amps
0.588 Amps
22.00 Volts
12.13
28.00 Volts
92.00 Volts
92.20 Volts
0.404 cm^2
1420 nH/T^2
28.8
0.60
0.38
3.59 Mohms
3.60 Mohms
7.34 cm
101 Volts
0.7 Volts
12
10 Volts
UNIT
Volts
Volts
Hertz
Volts
Amps
Watts
mSeconds
uFarads
P/N:
P/N:
Tel: [phone] Fax: [phone]
Power Supply Output Current (corresponding to
I^2f (product of current limit squared and frequency
TinySwitch-III on-state Drain to Source Voltage
ACDC_TinySwitch-III_011906_Rev0-27.xls;
TinySwitch-III Continuous/Discontinuous
Flyback Transformer Design Spreadsheet
RD91 - 12 V, 1 A, Universal Input
Minimum AC Input Voltage
Maximum AC Input Voltage
AC Mains Frequency
Output Voltage (at continuous power)
peak power)
Continuous Output Power
Efficiency Estimate at output terminals. Unter 0.7 if
no better data available
Z Factor. Ratio of secondary side losses to the total
losses in the power supply. Use 0.5 if no better data
available
Bridge Rectifier Conduction Time Estimate
Input Capacitance
User defined TinySwitch-III
Enter "RED" for reduced current limit (sealed
adapters), "STD" for standard current limt or "INC"
for increased current limit (peak or higher power
applications)
Minimum Current Limit
Maximum Current Limit
Minimum Device Switching Frequency
is trimmed for tighter tolerance)
Reflected Output Voltage (VOR < 135 V
Recommended)
Output Winding Diode Forward Voltage Drop
Ripple to Peak Current Ratio (KP < 6)
Transient Ripple to Peak Current Ratio. Ensure
KP_TRANSIENT > 0.25
Bias Winding Voltage
Bias Winding Number of Turns
Over Voltage Protection zener diode.
Target under-voltage threshold, above which the
power supply with start
Typical start-up voltage based on standard value of
RUV_ACTUAL
Calculated value for UV Lockout resistor
Closest standard value of resistor to RUV_IDEAL
User-Selected transformer core
PC40EE25-Z
EE25_BOBBIN
Core Effective Cross Sectional Area
Core Effective Path Length
Ungapped Core Effective Inductance
Power Integrations
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