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Overview
| Topology | Buck-Boost Converter |
| Input voltage | 4.5-36 V |
| Switching frequency | 100-2000 kHz |
| Output 1 | -12 V / 1.1 A |
| Output 2 | 15 V / 0.8 A |
| Output 3 | 12 V / 1.1 A |
| Output 4 | -15 V / 0.8 A |
| IC revision | 1.0 |
Description
We have developed a positive / negative power supply reference board that is ideal for high-precision analog circuits used in audio equipment and industrial equipment.In a system equipped with audio equipment, PLC, and sensors, when performing highly accurate analog processing, an operational amplifier that requires positive and negative power supplies is required to secure the dynamic range. In that case, ± 5V, ± 12V, ± 15V, etc. are necessary, and the power supply circuit may be large and complex.This reference board uses a single analog power supply controller IC (model: LT8471) to design two positive and negative power supplies. This makes the analog power supply very compact. In addition, since this reference circuit supports buck / boost / buck-boost, it is possible to realize a plus / minus power supply for operational amplifiers by supporting a wide range of input voltages.
Features
- Built-in dual 2A and single 0.5A / 50V power switch
- Both positive and negative outputs can be generated from a single input voltage
- Multi-topology 2-channel configuration such as step-down, step-up, SEPIC, ZETA, flyback, and inverting
- Switching frequency can be set from 100kHz to 2MHz
- Reduce input ripple by anti-phase switching
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT(A) | Mount | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | L1(µH) | L2(µH) | IR(A) | IR 2(A) | ISAT(A) | RDC1 typ(Ω) | RDC2 typ(Ω) | RDC1 max(Ω) | RDC2 max(Ω) | fres(MHz) | Type | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-LHMI SMT Power Inductor, 12 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LHMI SMT Power Inductor | Inductance12 µH | – | – | MountSMT | Performance Rated Current9.1 A | Saturation Current @ 10%12.9 A | Saturation Current @ 30%26.6 A | DC Resistance20 mΩ | – | – | – | – | – | – | – | – | – | Self Resonant Frequency7.6 MHz | – | ||||
 | WE-TPC SMT Tiny Power Inductor, 15 µH, 0.72 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance15 µH | Rated Current0.72 A | Saturation Current0.9 A | MountSMT | – | – | – | DC Resistance400 mΩ | – | – | – | – | – | – | – | – | – | Self Resonant Frequency32 MHz | – | ||||
 | WE-DD SMT Shielded Coupled Inductor, 15 µH, 3.3 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-DD SMT Shielded Coupled Inductor | Inductance15 µH | Rated Current3.3 A | Saturation Current6.1 A | – | – | – | – | DC Resistance55 mΩ | Inductance 115 µH | Inductance 215 µH | Rated Current3.3 A | Rated Current 23.3 A | Saturation Current6.1 A | DC Resistance 10.041 Ω | DC Resistance 20.041 Ω | DC Resistance 10.055 Ω | DC Resistance 20.055 Ω | Self Resonant Frequency14 MHz | TypeStraight |