LW1969E overview
LW1969E is a component documented by JOULWATT. The PDF description identifies it as "BUCK LED Regulator With Power Factor Correction Rev0.23." This guide condenses the most useful engineering information from the available PDF so that designers and sourcing teams can identify the checks that still need confirmation in the original document.
Datasheet snapshot
- Manufacturer: JOULWATT
- Part number: LW1969E
- Category: Power Management
- Datasheet length: 11 Pages
Specifications and operating details
The following points were extracted from the PDF text. Check the associated conditions, notes and limits in the complete document before using a value in a design.
- The JW ®1969A/JW1969B/JW1969C/JW1969D/ JW1969E/JW1969BC/JW1969DC/JW1969EC (JW1969X series) is a constant current LED regulator which apply to single stage step-down power factor corrected LED drivers.
- PIN CONFIGURATION TOP VIEW VIN OVP ABSOLUTE MAXIMUM RATING1） RECOMMENDED OPERATING CONDITIONS THERMAL PERFORMANCE4） θJA θJC Note： 1) Exceeding these ratings may damage the device.
- These stress ratings do not imply function operation of the device at any other conditions beyond those indicated under RECOMMENDED OPERATING CONDITIONS.
- Continuous operation over the specified absolute maximum operating junction temperature may damage the device.
- Units POWER SUPPLY VIN Start-Up Voltage VIN_ST 12 V VIN Quiescent Current IINQ 200 250 μA CURRENT REGULATION ISP Sample Reference VREF 192 200 208 mV Minimum On Time of MOSFET5) TON_MIN 0.8 μS Maximum On Time of MOSFET TON_MAX 13 18 27 μS.
- The turn off time of the MOSFET can be calculated as: TOFF = IPK× L / VOUT And the inductance of the system can be calculated as: L = VOUT× (VIN – VOUT) / (f×IPK×VIN) Where, f is the switching frequency of the step-down system.
- When Vo is higher than V O_OVP, LED open protection is triggered and the chip stops switching for 800ms.
Topics covered by the datasheet
The document includes sections related to:
- DESCRIPTION
- FEATURES
- APPLICATIONS
- ELECTRICAL CHARACTERISTICS
Engineering review checklist
- Verify capacitance tolerance, rated voltage, temperature range and any DC-bias derating.
- Check ESR, ripple-current capability, lifetime and polarity requirements under worst-case conditions.
- Confirm package dimensions, land pattern and reflow or mounting limits for the selected ordering code.
Always confirm values against the latest manufacturer-controlled datasheet, especially when qualifying a substitute or releasing a production BOM.
View the complete PDF and model record
Open the LW1969E datasheet and model details to review the complete PDF, document pages and available product information.
Source attribution
Adapted from the PDF associated with this DigiCamel model page.
Source model URL: https://www.digicamel.com/product.php?slug=lw1969e-joulwatt