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Item Name: SMPS 12V @ 1A
Item Code: 09A
switched-mode power supply (SMPS) (SMPS 12V @ 1A) is an electronic power supply unit (PSU) that incorporates a switching regulator. The salient features are enlisted below:
Input: 170 to 265 VAC ; 47 - 53 Hz, L N
Output: 12V @ 1A
Line and Load Regulation: 1 %
Output Ripple: 1%,
Operating Temperature: -10 to 50 deg C ; RH 95 % non condensing
Output Isolation: 1.5 KV rms @ 50 Hz for 1 minute.
Other Features:
Output short circuit protection • Input EMI-RFI filters • Screw type input / output connectors • Output LED indication • Integrated MOSFET and PWM controllers for greater reliability and space saving
Efficiency: >74 % at full load and normal I/P
Stand by power: <1.12
Output variation: Apprx. ±5% through preset.
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| SCHEMATIC FOR 12V 1A |
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| COMPONENT DETAIL |
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| TRANSFORMER DETAIL'S |
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| PCB DRAWING |
RATING: I/P:170V~265VAC, O/P: 12V--1A
A) VISUAL CHECKING
CHECK DRY SOLDERING CHECK POLARITY OF COMPONENT.
B) ELECTRICAL TEST
1. Connect the input and output, make sure the Line Neutral Earth at CN1 is OK and +Ve, -Ve at output is proper on your zic without Load and adjust the variac for 170V.
2. Switch on the psu and see the operation as follows:
(a). Bulb in series with a little glow.
(b). Output voltmeter show voltage 12V ±1%.
(c). If the AC ampere meter is on your zic, check the current in mA is showing.
(d). Output LED indication is Green.
3. Bypass the bulb and increase the load gradually to the maximum (1A) [make sure that your load resistance is proper] see the voltage regulation is ok (±1% is recommended) and increase the input voltage up to 265Vac and confirm that line regulation is maintaining [±1% recommended ].
4. Switch ON and OFF the power supply many times with full load, both at low ac input [170V] and high ac input[265V]. make sure every time working properly.
5.Increase the Ac volt up to 280v and see the shutdown in between 280v and 290v and Decrease the voltage 265V and see restarting.
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