Wide Input Range Notebook Power Adaptors (35W)
GENERAL: These small but powerful converters provide a source of stabilised low voltage suitable for running many different items of equipment. Their output is ohmically isolated from the system chassis and constant current limited. Continuous operation in current limit is allowed making them suitable for battery charging providing charge time is controlled. Connection to the battery is by a plug with a flying lead, that fits most standard cigar lighter sockets, and output is by flying lead terminated in a popular 2.5mm concentric plug.
The converters are mainly designed for use with notebook computers that have two wire input. These converters are current limited above a certain level of demand. The output isolation of the converter from system chassis ensures that earth currents do not flow.
BATTERY DRAIN: These converters draw about 1A at 12V or 0.5A at 24V input for every 10 watts of load applied.
Models available:
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SM 4550 12 & 24V input, 5V at 7A output. |
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SM 4551 12 & 24V input, 9V at 3.8A output. |
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SM 4552 12 & 24V input, 12V at 2.9A output. |
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SM 4553 12 & 24V input, 15V at 2.3A output. |
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SM 4554 12 & 24V input, 18V at 1.9A output. |
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SM 4555 12 & 24V input, 21V at 1.6A output. |
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SM 4556 12 & 24V input, 24V at 1.4A output. |
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SM 4557 12 & 24V input, 48V at 0.7A output. |
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SM 4558 12 & 24V input, 13.8V at 2.5A output. |
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SM 4559 12 & 24V input, 27.6V at 1.2A output. |
Specification:
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INPUT SPECIFICATION |
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BATTERY |
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Battery: |
12V or 24V Nominal car battery. |
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Voltage Range: |
11-30V (10.5-32V Short term). |
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Current, No Load: |
0.1A Typical. |
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Current Drawn Per 10W Load |
1A at 12V & 0.5A at 24V |
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Input Fuse Rating: |
6.3A (T). |
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Input to output isolation: |
500Kohm +/- 63V |
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OUTPUT SPECIFICATION |
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Output variation for 0-90% load change (plus drop in cable) |
0.5% max. |
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Output variation for 2V input change: |
50mV max. |
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Output current limit(See note 2): |
125% +/- 17%. |
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Output low frequency ripple: |
200mV max. |
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GENERAL |
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Size: |
111mm x 60mm x 30mm. |
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Weight: |
0.38 Kg. |
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Storage Temperature: |
-40 to +70C. |
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Operating Temperature: |
-20 to +35C. |
SPECIFICATION NOTES: The main variation of output voltage with load is due to the resistance of the output cable. An internal potentiometer is available to adjust the output voltage over a range of plus or minus 5% to compensate.
CAUTION: This converter is supplied on the basis of the user determining the suitability for the purpose for which it is to be used. Allow adequate ventilation to assist unit cooling. Removal of the input cigar plug will void warranty.
WARNING: Do not reverse input polarity. Do not expose to moisture. These converters are only suitable for use with vehicles having the negative of the battery connected to chassis. Not for life dependent use.