# Adjustable DC-DC **Buck-Boost Converter **400W

## Input voltage: **17 to 85V** • Output voltage: **18 to 60V **(adjustable) • Efficiency: **94 to 96%**

The ease of use of this converter-regulator, both step-down and step-up, simplifies the usual problems of DC-DC energy conversion. Main characteristics of this adjustable buck-boost converter:

- Accepts any input voltage, from 17 to 85V
- Delivers any output voltage, from 18 to 60V
- Generates 400W, with a very high efficiency, up to >96%
- With optional functions, adjustable or controllable
- Benefits from our free assistance “integration and control”
- Compact and with multiple mechanical presentations.

**Exemples of applications **using our innovative universal buck-boost converter regulator DC-DC:

**Technical Data **for this adjustable BuckBoost Converter 400W

### ELECTRICAL CHARACTERISTICS

- Input voltage “V
_{in}“: 17 to 85V (*accidental**maximum*: 86V) - Zero of input and output: common
**Output voltage**“V_{out}“: 18 to 60V- manual adjustment with inbuilt 10-turn axis (trimmer)
- factory setting upon request
- external adjustment through a resistance (optional)
- control according to chosen V
_{out}range (optional)

**Output power**“P_{out}“: 400W, independently of V_{out}(24 to 60V) and V_{in}(17 to 85V)**Output current**“i_{out}“: 0 to 17A- i
_{out}*max*(7 to 17A) determined by your choice of output voltage and under power 400W - standard limitation of i
_{out}: by hiccup, as soon as P_{out}reaches ≈ 405W - optional limitation of i
_{out}by constant current, from <1A to 17A, with adjustment: either with inbuilt axis “10 rounds”, or external, or with controllable range

- i
- Line and load regulation: better than 5.10
^{-3} - Nominal efficiency: 94 to > 96%
- Startup time: < 250 ms
- Dynamic response time (i
_{out}= 50 to 100%): < 1 ms - Ripple: ≤ 1% of V
_{out} - Switching frequency: fixed ≈ 230 kHz

### PROTECTIONS

- Protection against overloads and short-circuits: standard, by hiccup (pulsing i
_{out}), ≈ 2.5A RMS - Optional complementary limitation at constant current, adjustable from <1A to 17A, for V
_{out}≥ 18V - Thermal protection (automatic reset)
- Vibrations and shocks: sealing IP65 to IP67 (depending on the chosen presentation)

### THERMAL PERFORMANCES

- Storage / Operation: – 55°C to + 115°C / – 40°C to + 85°C
- Temperature coefficient: 2.10
^{-4}/ °C - Thermal resistances “Rt”: 7°C/W to 2°C/W, depending on chosen case
- How to calculate temperature rise “ΔT°” with natural convection:
- ΔT° = losses (in W) x Rt (in °C/W)
- Losses ≤ 25W for P
_{out}= 400W (and ≤ 10W for P_{out}= 100W), as the minimum efficiency varies from >94% to >91% when P_{out}varies from 400W to 100W - ΔT° is divided by 2 with pulsed air at 2m / s

### STANDARDS & SPECIFICATIONS

- Marking CE; UL60950-1 / EN60950-1; RoHS
- MTBF: > 500 000 hours at 25°C

### OPTIONS

- Please see paragraphs “output voltage” and “output current”
- “On / off” remote control
- Other presentations

**Mechanical Presentations – Casings**

Optional heatsinks / dissipators ≤ 1.5°C / W, available upon request.

PDF presentation here for this DC-DC BUCK-BOOST converter regulator.

Please also see our Universal buck-boost regulator** 2.8kW** DC-DC – Constant Voltage or Constant Current Generator – Input: 8 to 60V / 50A; output: 0 to 60V / 0 to 50A / 2.8k

Currently in development: **Mini-Regulators with very high efficiency**,

- buck ≤ 350W; input: 12 to 36V; output ≤ Vin – 3V; efficiency: up to 98%
- boost 120W; input: 9 to 15V; output: 24 or 36 or 48V; efficiency: up to 95%.