Document
JSI-150206B (LF) For 36Watts & 15”2 CCFL Panel
REV 1.0 2007-12-7
Prepared By
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JSI-150206B
Application scope
The JSI-150206B comprises a 36Watts One Outputs, full range switching power
supply and a DC to AC inverter that for a 15”color TFT-LCD TV module.
(JSI-150206B
15”
36W
DC to Ac
)
Products Function
All products including samples delivered will meet all the requirements as outlined
in the document. The basic requirements of the design features are listed below:
( l One Output Voltages:+12V l +12V l Build in DC-AC inverter l LCD l Short circuit protection / power limiting / over voltage l l Simple construction - easy assembly and service /repair l
)
l High reliability l
l High efficiency - to reduce temperature rise, The efficiency is greater than 78%. l 78% l Green Mode function for LCD panel to suppo rt “Blue Angel”Norm.The power
consumption will lese than 1 Watts at input 230Vac @No load
l 230V
1W
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Open frame section
JSI-150206B
1.0 Power supply connectors
DC Output
:
Location
: CN112
Connector type
Pin assignments: Table.1
: JST S6B-PH-K-S or equivalent
Pin No
Symbol
Description
1 +12V 2 +12V 3 ADJ 4 ON/OFF 5 GND 6 GND
Brightness control For inverter function
2.0 Electronics requirements
2.0.1 AC input AC
Table.2: Input voltage
Minimum
Typical
90 110/230
Table.3 Input Frequency
Minimum
Typical
47 50/60
Maximum 264
Maximum 63
Unit Vac
Unit Hz
2.0.2 Output voltages and loads Measured at the load end of connected cables Table.4 SPS load limits
Signal Name
Voltage /V
Minimum Typical Maximum
I max
Current /mA
I surge
I min
+12V(for M/B) 11.4 12.0 12.6 2000
10
+12V(for inverter) 11.4 12.0 12.6 1000
0
Note : 1 The output voltage shall remain within the following the output regulation under Imax , Imin. at any AC input condition.
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JSI-150206B
2.0.3 Ripple and noise Table.5 lists the Ripple and Noise limitations of switching power supply unit only under all
operating conditions including the input line voltage range and over all the full load range.
Table.5 Ripple and Noise Limitations
Signal Name +12V
Ripple & Noise 150
(mVpp)
Note
a) The measuring is done by 20MHz band width limited oscilloscope and terminated each
output with a 10uF capacitor in parallel with a 0.1uF capacitor.
10uF 0.1uF
20M
b) While test ripple noise of the output the probe shall avoid any coupling from other circuit or equipment
2.0.4 Protection capability The switching power supply will be auto recovery while the fault is removed.
a) Short circuit protection(
DC output shall have short circuit protection. A short condition on any of DC outputs shall cause no damage to the power supply. The unit shall recover and function automatically as soon as the short condition is removed.
b) Fuse protection( The Fuse inside the power supply shall open when the AC input current is over
the rated current of fuse. This Fuse protection will cause switching power supply to fail.
AC
c) Over voltage protection (
The power supply have the over voltage protection. When the main feedback control circuit fault occur .The power supply shall be over voltage protection to protect the whole system.
2.0.5 Power supply efficiency
78% min. It will be measured at the maximum load and TYPICAL line (110V/230V)
110V/230V
78%
2.0.6 Hold-up time
The power supply shall maintain voltage regulation within the specified limits in table 4 for at
least 10 milliseconds (one cycle drop) after losing of input voltage and load under the following
conditions:
4 10
Input voltage: 110Vac
110Vac
Loading: max output load
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JSI-150206B
2.0.7 MTBF
50,000 hrs at 25 when calculated using MIL-HDBK-217F. The VENDOR can use agreed
upon F.I.T. (failure - in - time) number in place of MTBF.
25 MIL-HDBK-217F
50,000
F.I.T M.T.B.F
2.0.8 Feedback reliability The power supply feedback circuit system shall be test under all the line and load
condition .For the reliability consideration the gain margin shall be large 6db or phase
margin large than 45 degree.
( 6db
45 )
2.0.9 Green mode function The power supply shall have the green mode function, When there is no output. The input
power consumption shall less than 1Watts under AC230V 50Hz input 230V/50Hz
1W 2.1.0 Equipment meet standard
The power supply shall meet the equipment of class II. II
3.0 Environmental requirements
3.0.1 Operating temperature
Power Operating
0 to +50 °C
Storage
-20 to +80 °C
Note : Thermal test must be done at nom. AC and at I max load.
3.0.2 Humidity Operating
10% to 90% RH
4.0 International standards
4.0.1 EMI standards EMI
Designed to meet the following conducted & radiation limits: CISPR 22 Class B
& CISPR 22 Class B
4.0.2 EMS standards EMS
a) Electrostatic Discharge Immunity Test: IEC-1000-4-2 8KV, Criteria B
( ? IEC-1000-4-2 8KV, Criteria B)
b) EFT/Burst Immunity Test: IEC-1000-4-4 1KV, Criteria B
IEC-1000-4-4 1KV, Criteria B
c) Surge Immunity Test: IEC-1000-4-5 6KV, Criteria B
IEC-1000-4-5 6KV, Cri.