PrimAccurate™ Digital Controller in a SOT-23 Package
Jump to Page Section:
Overview
Description
The iW1707 is a high-performance AC/DC controller designed to drive an external power bipolar junction transistor (BJT) for peak current mode PWM flyback power supplies. Ideal for networking power supplies in applications such as ADSL modems and wireless access points, the iW1707 integrates a proprietary soft-start feature that allows for a smooth, yet fast start-up into capacitive loads between 330µF to 6000µF.
The iW1707 meets the US DoE’s external power supply standard and the EU’s Code of Conduct, Version 5, Tier 1 standard with no-load power consumption less than 100mW. As a PrimAccurate™ controller, which uses primary-side control algorithms, the iW1707 does not need any direct secondary-side feedback components, eliminating the need for optocouplers, and reducing component count and solution cost. Additional features include Renesas' proprietary EZ-EMI™ technology, quasi-resonant control for optimal efficiency at heavy loads, cable and connector voltage drop compensation options, full protection from fault conditions, and tiny packaging.
Features
- Adaptively controlled soft start-up - Fast yet smooth start-up into large capacitive loads
- Active start-up circuit to reduce turn-on time without increasing no-load power
- Intrinsically low noise solution - No audible noise over the entire operating range
- Active start-up circuit to reduce turn-on time
- 72kHz PWM switching frequency
- Meets DoE external power supply and EU Code of Conduct, Version 5, Tier 1 standards
- Less than 100mW no-load power consumption
- Voltage offset compensation for voltage loss in cables and connectors (3 options)
- PrimAccurate™ - Primary-side control, no optocoupler needed
- Quasi-resonant control for optimal efficiency
- EZ-EMI™ design to easily meet global EMI specifications
- Fast dynamic load regulation
- Fully protected from fault conditions
- Over-temperature protection
- Output overvoltage and overcurrent
- Input undervoltage protection
- Sense-resistor short circuit protection
Applications
Applications
- Networking power supplies
- ADSL modems
- Wireless access points
Documentation
| Type | Date | |
|---|---|---|
| PDF 1014 KB | Datasheet | |
| PDF 5.51 MB 日本語 | Brochure | |
| PDF 597 KB | White Paper | |
3 items
|
||
Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Processing table
| SOT23-6L | Tape & Reel | Get Samples, | |
| SOT23-6L | Tape & Reel | Get Samples, | |
| SOT23-6L | Tape & Reel | Get Samples, |
Tips for Using This Parametric Table:
- Hide Filters button in header: Collapse or expands filters
- Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
- Reset button in header: Reset all filters to the page default
- Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
- Export button in header: Export the filtered results of the table to an Excel document
- Filter parts search bar in header: Type to filter table results by part number
- Hide column button in column headers: Select to hide columns in table
- AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
- Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
- Document icon next to product name in row: View the featured document for this product
- Chip icon next to the right of the document icon in row: View the block diagram for this product
- Cart icon to the right of the chip icon: Indicates that samples are available for this product
Support
Renesas Samples
Select an orderable part number:
| Orderable Part ID | Sample |
|---|---|
| iW1707-00 | Availability |
| iW1707-01 | Availability |
| iW1707-03 | Availability |