VKA150MS

The VKA150MS series DC/DC converters present an economical and practical solution for distributed power system architectures which require high power density and efficiency while maintaining system modularity and upgradeability. The output of VKA150MS is fully isolated from the input, allowing for a variety of polarity and grounding configurations. With the ability to operate over a wide input voltage range of 33 to 75 volts, these modules are ideal for use in battery backup applications common in todays' telecommunication and electronic data processing applications. The patented fixed frequency architecture combined with surface mount technology results in a compact, efficient and reliable solution to DC/DC conversion requirements. Safety approvals per UL/CUL 1950, EN 60950. The VKA150MS's proprietary control circuitry responds to 50- 100% load steps in 100Seconds to within 1% nominal Vout.

The features of VKA150MS can be summarized as (1)33 - 75V input range; (2)high efficiency: 87% typical at 5V; (3)100S transient response 50- 100% load step; (4)420 kHz fixed-frequency operation; (5)remote sense; (6)operation to +100°C baseplate temperature; (7)primary remote on/off, choice of pos/neg logic; (8)adjustable output voltage; (9)continuout short-circuit protection; (10)thermal shutdown; (11)case ground pin; (12) UL/CUL 1950, VDE EN60950.

The absolute maximum ratings of VKA150MS are (1)voltage range: 48(typ)/75(max) VDC; (2)maximum input current VIN = 30VDC: 6.6 A; (3)reflected ripple current peak - peak: 550 mA; (4)input ripple rejection DC to 1KHz: 50(min)/60(max)dB; (5)no load input current MS: 100 mA; (6)power dissipation MS no load: 4.8 W; (7)standby, primary on/off disabled MS: 0.4 W; (8)inrush charge V IN = VIN max: 0.360 mC; (9)quiescent operating current primary on/off disabled: 8/12 mA.