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EPR-00015 Datasheet(PDF) 3 Page - Power Integrations, Inc.

Part No. EPR-00015
Description  3W, Universal Input, Single Output, Isolated Converter with TNY254 (EP-15)
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Maker  POWERINT [Power Integrations, Inc.]
Homepage  http://www.powerint.com
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EPR-00015 Datasheet(HTML) 3 Page - Power Integrations, Inc.

 
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Engineering Prototype Report
EPR-00015
Page 3 of 24
1.0 Introduction
This document presents the specification, schematic & BOM, transformer design, test data, wave forms and
EMI scan for a low cost, isolated converter (EP15) for low current battery charging applications (long
charging time, NiCd). A typical application is illustrated in Figure 1.1.
The unit has low input voltage detection circuit, programmable for 110 or 220Vac operation.
When the line voltage drops below the threshold, the battery energizes the inverter and the lamp turns on.
When the line voltage exceeds the threshold, the battery is disconnected from the inverter, the lamp turns off
and the battery is recharged.
The EP15 output voltage can be reduced, while maintaining the same charging current (reduced power).
The EP15 is designed to meet the industry’s safety and EMI standards.
Figure 1.1. Battery charger block diagram.
2.0 Power Supply Requirements Specification
Description
Symbol
Min
Typ
Max
Units Comment
Input
Operating Input Voltage
Vin
85*
265
Vac
50/60Hz
No load input power
250
mW
@ 230Vac
Output
Green LED indicator
Output Voltage**
Vout
12
Vdc
+/-6% Total
Output Ripple Voltage
Vout ripple
200
mV
Peak to Peak
Output Current ***
Iout
0.25
A
Power Output
Continuous Output Power
Pout
3
W
@ Full Load
Power supply efficiency
h
75
%
@ Full Load
Environmental
Temperature
Tamb
0
25
50
°C
Safety
IEC950/UL1950
Surge (differential, 2 ohm)
Line-Line
1
kV
IEC/UL 1000-4-5 Class 3
Surge (common mode, 12 ohm)
Line-Earth
2
kV
IEC/UL 1000-4-5 Class 3
EMI-Conducted
CISPR22B
*Under voltage lockout threshold set/programmable with a voltage divider
(100Vac for universal input, 175Vac for single voltage input 230Vac).
**Can be adjusted by changing the output Zener diode VR1.
***The maximum short circuit current is 0.94A
Inverter
Relay(NC)
Battery
N
Power Supply EP15
NEON LAMP
L
Current setting resistor


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