UM10437
GreenChip 65 W TEA1738LT/T and TEA1703 demo board
Rev. 1 — 28 February 2011
User manual
Document information
Info
Keywords
Abstract
Content
Notebook adapter, TEA1738LT/T, TEA1703, fixed frequency, ultra-low
standby power, high-efficiency, slim line
This manual provides the specification, schematics and PCB layout of the
65 W TEA1738LT/T and TEA1703 demo board. For details on the
TEA1738LT/T or TEA1703 IC please refer to the application note.
NXP Semiconductors
UM10437
GreenChip 65 W TEA1738LT/T and TEA1703 demo board
Revision history
Rev
v.1
Date
20110228
Description
first issue
Contact information
For more information, please visit:
http://www.nxp.com
For sales office addresses, please send an email to:
salesaddresses@nxp.com
UM10437
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
User manual
Rev. 1 — 28 February 2011
2 of 27
NXP Semiconductors
UM10437
GreenChip 65 W TEA1738LT/T and TEA1703 demo board
1. Introduction
WARNING
Lethal voltage and fire ignition hazard
The non-insulated high voltages that are present when operating this product, constitute a
risk of electric shock, personal injury, death and/or ignition of fire.
This product is intended for evaluation purposes only. It shall be operated in a designated test
area by personnel qualified according to local requirements and labor laws to work with
non-insulated mains voltages and high-voltage circuits. This product shall never be operated
unattended.
This 65 W TEA1738LT/T and TEA1703 demo board demonstrates the capabilities of the
TEA1738LT/T Switched-Mode Power Supply (SMPS) controller and the TEA1703 standby
controller. This manual provides the specification, schematics and PCB layout of the 65 W
TEA1738LT/T and TEA1703 demo board.
Refer to the TEA1738LT/T
data sheet
and
application note
(AN10981) for details on the
TEA1738LT/T. In addition, refer to the
TEA1703 datasheet
and
application note
(AN11012) for details on the TEA1703.
In Standby mode operation (no-load condition), the TEA1703 standby control IC monitors
the output voltage and disables the primary controller until the output voltage has reached
its lowest preset value. This ensures ultra-low standby power consumption.
019aab616
Fig 1.
TEA1738LT/T and TEA1703 65 W demo board
1.1 Features
•
•
•
•
•
UM10437
Universal mains supply operation
OverCurrent Protection (OCP)
OverPower Protection (OPP)
Low ripple and noise
Slim line transformer
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
User manual
Rev. 1 — 28 February 2011
3 of 27
NXP Semiconductors
UM10437
GreenChip 65 W TEA1738LT/T and TEA1703 demo board
•
•
•
•
•
Low-cost implementation
Indicator LED
Ultra low no-load standby power (< 50 mW at 230 V, 50 Hz)
ENERGY STAR compliant
EMI CISPR22 compliant
2. Power supply specification
Table 1.
Symbol
V
i
f
i
P
i(no_load)
Table 2.
Symbol
V
o
V
o(min)
V
o(ripple)(p-p)
I
o
I
o(p)
P
o
t
holdup
-
-
t
startup
-
Input specification
Description
input voltage
input frequency
input power (no-load)
Output specification
Description
output voltage
Minimum output voltage
peak-to-peak output
ripple voltage
output current
peak output current
output power
hold-up time
line regulation
load regulation
start-up time
efficiency
EMI
Conditions
-
during standby mode
operation
20 MHz bandwidth
continuous
for 50 ms
0 to 40
C
at 115 V; 60 Hz; full load
-
-
at 115 V; 60 Hz
according to ENERGY
STAR (EPS 2)
CISPR22 compliant
Specification
19
12
200
0 to 3.34
5
65
5
1
2
3
87
pass
Unit
V
V
mV
A
A
W
ms
%
%
s
%
-
Conditions
-
-
at 230 V; 50 Hz
Specification
90 to 264
47 to 60
< 50
Unit
V
Hz
mW
3. Performance data
Performance figures based on the following PCB design:
•
Schematic version: Tuesday 18 November 2010 rev. A
3.1 Efficiency
Efficiency measurements were made using an automated test program containing a
temperature stability detection algorithm. The output voltage and current were measured
using a 4-wire current sense configuration directly at the PCB connector. Measurements
were performed for 115 V; 60 Hz and 230 V; 50 Hz.
UM10437
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
User manual
Rev. 1 — 28 February 2011
4 of 27
NXP Semiconductors
UM10437
GreenChip 65 W TEA1738LT/T and TEA1703 demo board
Efficiency results
[1][2]
ENERGY
Efficiency (%)
STAR 2.0
Average 100 % 75 %
efficiency
load
load
requirement
(%)
> 87
> 87
90.3
91.6
88.8
91.6
90.5
92.1
50 %
load
100 % 1 W
load
0.5 W 0.25 W
Table 3.
Condition
115 V, 60 Hz
230 V, 50 Hz
[1]
[2]
90.4
91.7
90.5
90.9
76.8
74.8
69.1
66.4
57.8
54.3
Warm-up time: 10 minutes
There is an efficiency loss of 1 % (approximately) when measured at the end of a 1 m output cable.
A
V
Cable
014aab147
DC current
source
Fig 2.
DC resistance output cable
DC resistance cable = voltage drop / current = 0.228 / 3.349 = 0.0681
(2-way).
3.2 No-load power consumption
Power consumption performance of the total application board with no-load connected
was measured using a Yokogawa WT210 digital power meter. Integration time was set to
6 minutes to calculate the average dissipated power. The output voltage variation results
are shown in
Table 4.
Measurements were performed for 90 V; 60 Hz, 115 V; 60 Hz,
230 V; 50 Hz, and 264 V; 50 Hz.
Table 4.
Condition
90 V; 60 Hz
115 V; 60 Hz
230 V; 50 Hz
264 V; 50 Hz
Output voltage and power consumption: no-load
ENERGY STAR 2.0
requirement (mW)
300
300
300
300
Output voltage
high (V)
19.8
19.8
19.8
19.8
Output voltage
low (V)
14.2
14.2
14.2
14.2
No-load power
consumption (mW)
8
11
39
56
3.3 Minimum output current in normal operation
The minimum current required to leave Standby mode and enter normal operation was
measured for 90 V; 60 Hz and 264 V; 50 Hz.
Table 5.
Condition
Current (mA)
Minimum current for normal operation
90 V; 60 Hz
2
264 V; 50 Hz
5
UM10437
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
User manual
Rev. 1 — 28 February 2011
5 of 27
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