Non-Isolated DC/DC Converter (POL) TSN 1 Series, 1 A Non-isolated converter for negative output Small size and low profile Pin compatible with LM79xx linear regulators No heatsink required The new TSN 1 series step-down switching regulators are drop-in replacement High efficiency up to 96% for inefficient LM79xx linear regulators. A high efficiency up to 96 % allows full load operation up to +70C (+85C with derating) ambient temperature with- Operation temp. range 40C to +85C out the need of any heat-sink or forced air cooling. The TSN 1 switching regula- Protection against overload, short tors provide other significant features over linear regulators, i.e. better output circuit and over-temperature accuracy (2 %), lower standby current of ~2 mA and no requirement of exter- nal capacitors. They are suitable for negative output circuits. The high efficiency Fixed switching frequency and low standby power consumption make these regulators an ideal solution Wide input range up to 32 VDC for energy sensitive applications. Excellent line / load regulation Models Order Code Output Current Input Voltage Output Voltage Efficiency max. Range nom. typ. TSN 1-2450 5 VDC 88 % 7 to 32 VDC (12 VDC nom.) TSN 1-2452 5.2 VDC 89 % TSN 1-2460 8 to 32 VDC (12 VDC nom.) 6 VDC 90 % 1 000 mA 92 % TSN 1-2480 10.5 to 32 VDC (12 VDC nom.) 8 VDC TSN 1-2490 11.5 to 32 VDC (24 VDC nom.) 9 VDC 93 % TSN 1-24120 15 to 32 VDC (24 VDC nom.) 12 VDC 94 % 18 to 32 VDC (24 VDC nom.) 15 VDC 95 % TSN 1-24150 Options Suffix A - Angular pin version Page 1 / 4 www.tracopower.com January 10, 2022TSN 1 Series, 1 A Input Specifications Input Current - At no load -12 Vin models: 3 mA typ. -24 Vin models: 3 mA typ. Reflected Ripple Current 100 mAp-p typ. Recommended Input Fuse -12 Vin models: 1 600 mA (slow blow) -24 Vin models: 1 600 mA (slow blow) (The need of an external fuse has to be assessed in the final application.) Input Filter Internal Capacitor Output Specifications Voltage Set Accuracy 2% max. Regulation - Input Variation (Vmin - Vmax) 1% max. - Load Variation (10 - 100%) 0.6% max. Ripple and Noise -24 Vin models: 75 mVp-p max. (20 MHz Bandwidth) -5 Vout models: 50 mVp-p max. -5.2 Vout models: 50 mVp-p max. -6 Vout models: 75 mVp-p max. -8 Vout models: 75 mVp-p max. Capacitive Load -5 Vout models: 1 600 F max. -5.2 Vout models: 1 600 F max. -6 Vout models: 1 000 F max. -8 Vout models: 1 000 F max. -9 Vout models: 1 000 F max. -12 Vout models: 470 F max. -15 Vout models: 470 F max. Minimum Load 10 % of Iout max. Temperature Coefficient 0.015 %/K max. Start-up Time 15 ms max. Short Circuit Protection Continuous, Automatic recovery Transient Response - Response Deviation 5% typ. / 7% max. (50% to 100% Load Step) - Response Time 250 s typ. / 350 s max. (50% to 100% Load Step) General Specifications Relative Humidity 95% max. (non condensing) Temperature Ranges - Operating Temperature 40C to +85C - Storage Temperature 55C to +125C Power Derating - High Temperature See application note: www.tracopower.com/overview/tsn1 Over Temperature - Protection Mode 165C typ. (Latch off) Protection Switch Off - Measurement Point Internal IC temperature Operation at lower load will not damage the converter, but it may not meet all specifications listed Cooling System Natural convection (20 LFM) Switching Frequency 323 - 437 kHz (PWM) (380 kHz typ.) (5 & 5.2 Vout models) 425 - 575 kHz (PWM) (500 kHz typ.) (other Vout models) Insulation System Non-isolated Reliability - Calculated MTBF 8 475 000 h (MIL-HDBK-217F, ground benign) Washing Process Allowed (hermetical product) www.tracopower.com/info/cleaning.pdf See Cleaning Guideline: All specifications valid at nominal voltage, resistive full load and +25C after warm-up time, unless otherwise stated. Page 2 / 4 www.tracopower.com January 10, 2022