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Overview
| Topology | Buck Converter |
| Input voltage | 4.5-18 V |
| Switching frequency | 300-700 kHz |
| Output 1 | 8 V / 12 A |
| IC revision | 1.0 |
Description
12A, 18V, 500kHz, ACOT™ Synchronous Step-Down Converter.RT1650 is a fully integrated wireless power receiver, intended for wireless power in mobile devices up to 7.5W. This application note explains basic principles of Wireless Power Transfer, Wireless Power standards and the Qi WPC1.1 low power standard, and describes the features of RT1650. Several system aspects of a WPC1.1 5W application are presented by means of a practical example which uses a Nokia DT601 wireless power transmitter and the Richtek Wireless power receiver RT1650 evaluation board.
Features
4.5V to 18V Input Voltage Range 12A Output Current 12mΩInternal High-Side N-MOSFET and 5.4mΩInternal Low-Side N-MOSFET Advanced Constant On-Time Control Fast Transient Response Support All Ceramic Capacitors Up to 95% Efficiency Adjustable Switching Frequency from 300kHz to 700kHz Adjustable Output Voltage from 0.7V to 8V Adjustable Soft-Start Pre-bias Start-Up Adjustable Current Limit from 6A to 16A Cycle-by-Cycle Over Current Protection Power Good Output Input Under-Voltage Lockout Hiccup Mode Under-Voltage Protection Thermal Shutdown Protection
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC(mΩ) | fres(MHz) | Material | RDC max.(mΩ) | LR(µH) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCC SMT High Current Cube Inductor, 1 µH, 18.8 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCC SMT High Current Cube Inductor | Inductance1 µH | Performance Rated Current18.8 A | Saturation Current @ 10%22.9 A | Saturation Current @ 30%25.1 A | – | Self Resonant Frequency147 MHz | MaterialFerrite | DC Resistance3.9 mΩ | Rated Inductance0.97 µH | ||||
 | WE-HCI SMT Flat Wire High Current Inductor, 1.2 µH, 32.6 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCI SMT Flat Wire High Current Inductor | Inductance1.2 µH | Performance Rated Current32.6 A | Saturation Current @ 10%12 A | Saturation Current @ 30%25 A | DC Resistance1.8 mΩ | Self Resonant Frequency75 MHz | MaterialSuperflux | DC Resistance1.98 mΩ | Rated Inductance1 µH |