Non-Isolated DC/DC Converter (POL)
•
Non-isolated converter for negative
output
•
•
Small size and low profile
•
•
•
•
No heatsink required
•
•
•
Fixed switching frequency
TSN 1 Series, 1 A
Pin compatible with LM79xx linear
regulators
High efficiency up to 96%
Operation temp. range –40°C to +85°C
Protection against overload, short
circuit and over-temperature
Wide input range up to –32 VDC
The new TSN 1 series step-down switching regulators are drop-in replacement
for inefficient LM79xx linear regulators. A high efficiency up to 96 % allows full
load operation up to +70°C (+85°C with derating) ambient temperature without the need of any heat-sink or forced air cooling. The TSN 1 switching regulators provide other significant features over linear regulators, i.e. better output
accuracy (±2 %), lower standby current of ~2 mA and no requirement of external capacitors. They are suitable for negative output circuits. The high efficiency
and low standby power consumption make these regulators an ideal solution
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 %
–5.2 VDC
89 %
–8 to –32 VDC (–12 VDC nom.)
–6 VDC
90 %
–10.5 to –32 VDC (–12 VDC nom.)
–8 VDC
92 %
–7 to –32 VDC (–12 VDC nom.)
TSN 1-2452
TSN 1-2460
1'000 mA
TSN 1-2480
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 %
TSN 1-24150
–18 to –32 VDC (–24 VDC nom.)
–15 VDC
95 %
Options
Suffix A
- Optional models with angular pins (see outline dimensions)
www.tracopower.com
September 20, 2023
Page 1 / 4
TSN 1 Series, 1 A
Input Specifications
Input Current
-12 Vin models: 3 mA typ.
-24 Vin models: 3 mA typ.
100 mAp-p typ.
- At no load
Reflected Ripple Current
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.)
Internal Capacitor
Input Filter
Output Specifications
Voltage Set Accuracy
Regulation
- Input Variation (Vmin - Vmax)
- Load Variation (10 - 100%)
Ripple and Noise
(20 MHz Bandwidth)
-24 Vin models:
-5 Vout models:
-5.2 Vout models:
-6 Vout models:
-8 Vout models:
-5 Vout models:
-5.2 Vout models:
-6 Vout models:
-8 Vout models:
-9 Vout models:
-12 Vout models:
-15 Vout models:
Capacitive Load
Minimum Load
Temperature Coefficient
Start-up Time
Short Circuit Protection
Transient Response
- Response Deviation
- Response Time
±2% max.
1% max.
0.6% max.
75 mVp-p max.
50 mVp-p max.
50 mVp-p max.
75 mVp-p max.
75 mVp-p max.
1'600 µF max.
1'600 µF max.
1'000 µF max.
1'000 µF max.
1'000 µF max.
470 µF max.
470 µF max.
10 % of Iout max.
±0.015 %/K max.
15 ms max.
Continuous, Automatic recovery
5% typ. / 7% max. (50% to 100% Load Step)
250 µs typ. / 350 µs max. (50% to 100% Load
Step)
General Specifications
Relative Humidity
Temperature Ranges
Power Derating
- Operating Temperature
- Storage Temperature
- High Temperature
Over Temperature
Protection Switch Off
- Protection Mode
- Measurement Point
Cooling System
Switching Frequency
Insulation System
Reliability
Washing Process
- Calculated MTBF
95% max. (non condensing)
–40°C to +85°C
–55°C to +125°C
Depending on model
See application note: www.tracopower.com/overview/tsn1
165°C typ. (Latch off)
Internal IC temperature
Operation at lower load will not damage the
converter, but it may not meet all specifications
listed
Natural convection (20 LFM)
323 - 437 kHz (PWM) (380 kHz typ.)
(5 & 5.2 Vout models)
425 - 575 kHz (PWM) (500 kHz typ.)
(other Vout models)
Non-isolated
8'475'000 h (MIL-HDBK-217F, ground benign)
According to Cleaning Guideline
www.tracopower.com/info/cleaning.pdf
All specifications valid at nominal voltage, resistive full load and +25°C after warm-up time, unless otherwise stated.
www.tracopower.com
September 20, 2023
Page 2 / 4
TSN 1 Series, 1 A
Environment
MIL-STD-810F
MIL-STD-810F
MIL-STD-810F
Plastic (UL 94 V-0 rated)
Silicone (UL 94 V-0 rated)
Copper
Nickel (2 - 3 µm)
Tin (3 - 5 µm), matte
Plastic Case
PCB Mount
THD (Through-Hole Device)
SIP3
Lead-Free Wave Soldering
265°C / 10 s max.
3.1 g
www.tracopower.com/info/reach-declaration.pdf
REACH SVHC list compliant
REACH Annex XVII compliant
www.tracopower.com/info/rohs-declaration.pdf
Exemptions: 7a, 7c-I
(RoHS exemptions refer to the component
concentration only, not to the overall
concentration in the product (O5A rule).)
4fb36516-9b37-46c7-a5b7-e0d667b02022
- Vibration
- Mechanical Shock
- Thermal Shock
Housing Material
Potting Material
Pin Material
Pin Foundation Plating
Pin Surface Plating
Housing Type
Mounting Type
Connection Type
Footprint Type
Soldering Profile
Weight
Environmental Compliance - REACH Declaration
- RoHS Declaration
- SCIP Reference Number
Supporting Documents
Overview Link (for additional Documents)
www.tracopower.com/overview/tsn1
Outline Dimensions
Straight pin version
0.5
Pinout
7.5
Pin
Single
1
GND
2
–Vin
3
–Vout
(0.30)
3.1
0.25
(0.010)
(0.12)
(0.020)
Bottom view
11.7
0.5
(0.02)
2
4.1
1
(0.16)
3
3.3 2x2.54
(0.13) (2x0.10)
(0.65)
16.5
(0.46)
Dimensions in mm (inch)
Tolerances: x.x ±0.5 (±0.02)
x.xx ±0.25 (±0.01)
Pin dimension tolerance ±0.004 (±0.1)
All specifications valid at nominal voltage, resistive full load and +25°C after warm-up time, unless otherwise stated.
www.tracopower.com
September 20, 2023
Page 3 / 4
TSN 1 Series, 1 A
Angular pin version (suffix A)
4.1
(0.16)
0.5
(0.02)
7.5
(0.30)
Bottom view
3.0
1.5
(0.06)
(0.11)
0.5
(0.02)
0.25
Pinout
Pin
Single
1
GND
2
–Vin
3
–Vout
(0.01)
11.7
1
2
3.3 2x2.54
(0.13) (2x0.10)
3
(0.65)
16.5
(0.46)
Dimensions in mm (inch)
Tolerances: x.x ±0.5 (±0.02)
x.xx ±0.25 (±0.01)
Pin dimension tolerance ±0.004 (±0.1)
© Copyright 2023 Traco Electronic AG
Specifications can be changed without notice.
www.tracopower.com
Rev. September 20, 2023
Page 4 / 4
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