DH321 overview
DH321 is a component documented by ON Semiconductor. The PDF description identifies it as "Green Mode Power Switch December, 2019 - Rev. 0." 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: ON Semiconductor
- Part number: DH321
- Category: IC
- Datasheet length: 16 Pages
Key features noted in the PDF
- Internal Avalanche Rugged SENSEFET
- Consumes only 0.65 W at 240 V AC & 0.3 W Load with Advanced Burst−Mode Operation
- Frequency Modulation for EMI Reduction
- Precision Fixed Operating Frequency
- Internal Start−up Circuit
- Pulse−by−Pulse Current Limiting
- Abnormal Over Current Protection (AOCP)
Applications listed in the PDF
- SMPS for STB, Low Cost DVD Player
- Auxiliary Power for PC
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.
- OUTPUT POWER TABLE** Typical continuous power in a non−ventilated enclosed adapter with sufficient drain pattern as a heat sinker, at 50°C ambient.
- Maximum practical continuous power in an open frame design with sufficient drain pattern as a heat sinker, at 50°C ambient.
- Once the Vcc reaches 12 V, the internal switch is opened.
- Pulse test: Pulse width ≤ 300us, duty ≤ 2% These parameters, although guaranteed, are tested in EDS (wafer test) process **Table 3.
- TYPICAL APPLICATION CIRCUIT** High efficiency (> 70% at full load, full input range) Low standby mode power consumption (< 1 W at DC 375 V input and 0.5 W load) Low component count Enhanced system reliability through various protection fun.
- The pule−by−pulse peak current limit level(ILIM) is set to default value 0.7 A by floating the Ipk pin (#4).
- R102 and C101 clamp the DRAIN voltage of MOSFET below 650 V under all conditions.
Topics covered by the datasheet
The document includes sections related to:
- Features
- Applications
- ORDERING INFORMATION
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 DH321 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=dh321-on-semiconductor