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PDF UM10437 Data sheet ( Hoja de datos )
| Número de pieza | UM10437 | |
| Descripción | GreenChip 65 W TEA1738LT/T and TEA1703 demo board User manual | |
| Fabricantes | NXP Semiconductors | |
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UM10437
GreenChip 65 W TEA1738LT/T and TEA1703 demo board
Rev. 1 — 28 February 2011
User manual
Document information
Info Content
Keywords
Notebook adapter, TEA1738LT/T, TEA1703, fixed frequency, ultra-low
standby power, high-efficiency, slim line
Abstract
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.
http://www.Datasheet4U.com
1 page  
NXP Semiconductors
UM10437
GreenChip 65 W TEA1738LT/T and TEA1703 demo board
Table 3. Efficiency results[1][2]
Condition
ENERGY Efficiency (%)
STAR 2.0 Average 100 % 75 %
efficiency
load load
requirement
(%)
115 V, 60 Hz > 87
90.3 88.8 90.5
230 V, 50 Hz > 87
91.6 91.6 92.1
50 %
load
90.4
91.7
100 % 1 W
load
90.5 76.8
90.9 74.8
0.5 W 0.25 W
69.1 57.8
66.4 54.3
[1] Warm-up time: 10 minutes
[2] There is an efficiency loss of 1 % (approximately) when measured at the end of a 1 m output cable.
Cable
A
V
DC current
source
014aab147
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. Output voltage and power consumption: no-load
Condition
ENERGY STAR 2.0 Output voltage Output voltage
requirement (mW) high (V)
low (V)
90 V; 60 Hz 300
19.8 14.2
115 V; 60 Hz 300
19.8 14.2
230 V; 50 Hz 300
19.8 14.2
264 V; 50 Hz 300
19.8 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. Minimum current for normal operation
Condition
90 V; 60 Hz
Current (mA)
2
264 V; 50 Hz
5
UM10437
User manual
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 28 February 2011
© NXP B.V. 2011. All rights reserved.
5 of 27
5 Page 
NXP Semiconductors
UM10437
GreenChip 65 W TEA1738LT/T and TEA1703 demo board
019aab625
Chan1 (yellow): VO; Chan2 (green): Gate pulse; Chan3 (magenta): Ctrl voltage.
Fig 11. 264 V; 50 Hz; full load; start up profile
Remark: The small discontinuity in the output voltage ramp at 264 V; 50 Hz is caused by
the slow start function not limiting the primary current because it is hidden by the leading
edge blanking period of 300 ns.
3.13 Hold-up time
Hold-up time is defined as the time between the following moments:
• After mains switch off; the moment that the lowest bulk cap voltage during a mains
cycle is crossed
• The moment that the output voltage starts to drop
The hold-up time is measured for 115 V; 60 Hz under full load (3.34 A) condition. Output
voltage duration was measured directly at the output connector.
The hold-up time at 115 V, 60 Hz is 10.9 ms.
UM10437
User manual
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 28 February 2011
© NXP B.V. 2011. All rights reserved.
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