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Overview
| Topology | Buck Converter |
| Input voltage | 5-37 V |
| Output 1 | 6 V |
| IC revision | 1 |
Description
The A81850 is a synchronous boost/buck/buck-boost controller with programmable outputs and a SPI communication interface capable of 80 W per channel. The device integrates two half-bridge drivers able to create a dual-channel synchronous boost or buck converter or a single-channel synchronous buck-boost converter.
Features
- Two-channel synchronous boost or buck controllers orsingle-channel buck-boost controller
- Wide VIN range: 5 to 37 V operating, 40 V transient
- Output voltage ranges:□ Boost mode: 16 to 65 V, with 2% accuracy□ Buck mode: 3.3 to 6 V, with 1.5% accuracy□ Buck-boost mode: 5 to 22 V, with 2% accuracy
- Programmable output voltage□ 8-bit resolution in boost and buck-boost mode□ 3.3 V, 4.5 V, 5 V, 5.5 V, and 6 V in buck mode
- Fixed-frequency operation, 200 to 450 kHz
- Array mode supports in-parallel operation of up to twounits (four phases): Units can be synchronized
Typical applications
- Electronic Power Steering, Information Systems and Entertainment
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,30%(A) | RDC typ.(mΩ) | RDC max.(mΩ) | fres(MHz) | Mount | C | VR(V (DC)) | Endurance(h) | IRIPPLE(mA) | Z(mΩ) | ILeak(µA) | DF(%) | Ø D(mm) | L(mm) | Packaging | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-XHMI SMT Power Inductor, 15 µH, 14.7 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-XHMI SMT Power Inductor | Inductance15 µH | Performance Rated Current14.7 A | Saturation Current @ 30%26.1 A | DC Resistance10.5 mΩ | DC Resistance11.55 mΩ | Self Resonant Frequency8 MHz | MountSMT | – | – | – | – | – | – | – | – | Length16.4 mm | – | ||||
 | WCAP-ASLI Aluminum Electrolytic Capacitors, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-ASLI Aluminum Electrolytic Capacitors | – | – | – | – | – | – | MountV-Chip SMT | Capacitance100 µF | Rated Voltage50 V (DC) | Endurance 2000 | Ripple Current350 mA | Impedance460 mΩ | Leakage Current50 µA | Dissipation Factor12 % | Diameter8 mm | Length10.5 mm | Packaging15" Tape & Reel | ||||
| WCAP-ASLI Aluminum Electrolytic Capacitors, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-ASLI Aluminum Electrolytic Capacitors | – | – | – | – | – | – | MountV-Chip SMT | Capacitance1000 µF | Rated Voltage10 V (DC) | Endurance 2000 | Ripple Current740 mA | Impedance150 mΩ | Leakage Current100 µA | Dissipation Factor19 % | Diameter10 mm | Length10.5 mm | Packaging15" Tape & Reel |