Orderable parts
| Type number | Orderable part number | Ordering code (12NC) | Package | Buy from distributors |
|---|---|---|---|---|
| NEX81802DA | NEX81802DAZ | 935691936342 | SOT8061-1 | Order product |
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Click here for more informationNEX81802DA
Adaptive Synchronous Rectifier (SR) controller with 0.5 to 1.5 microseconds turn-on blanking time
The NEX81801DA and NEX81802DA (NEX81801/2DA) are high performance synchronous rectification controllers used in switching mode power supplies. It supports operation in Discontinuous Conduction Mode (DCM), Continuous Conduction Mode (CCM) and quasi-resonant flyback converters.
The NEX81801/2DA regulates the forward drop voltage of an external synchronous rectifier (SR) MOSFET in two stages. This allows the SR FET to turn off quickly when the VDS becomes positive.
The externally adjustable turn-on blanking time can effectively prevent the synchronous rectifier from being falsely turned off due to leakage inductance and parasitic parameter oscillation.
The adaptive turn-on detection circuit can prevent the SR from being mistakenly turned on when the VDS DCM oscillation crosses zero during some load conditions. The adaptive turn-on detection circuit also enhances SR conduction efficiency during light load conditions, thereby improving the average efficiency of the power supply across the entire load range.
The synchronous switch can be configured at high-side or low-side output without auxiliary windings or other power sources, because the NEX81801/2DA has a self-supply capability.
The NEX81801/2DA uses TSOT23-6 packaging with low thermal resistance. This can effectively reduce the junction temperature of the chip, making it suitable for high-density power supply design.
Features and benefits
Supports DCM, CCM, QR operation
Supports up to 800 kHz switching frequency
Standard and logic level MOSFET driving capability
Wide output range down to 0 V with 2-channel VCC supply
No need for auxiliary winding for high-side or low-side rectification
Smart proportional gate driver for fast SR turn-off at CCM
Adjustable turn-on blanking time for increased noise immunity
Proprietary adaptive turn-on detection prevents SR FET from falsely turning on during DCM operation
10 ns typical turn-off propagation delay
Available in a TSOT23-6 FC package
ESD protection:
HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
CDM: ANSI/ESDA/JEDEC JS-002 class C2a exceeds 500 V
Applications
USB PD/QC chargers
AC/DC adapters for portable devices
Flyback SMPS with high-efficiency requirements
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Package
| Type number | Orderable part number, (Ordering code (12NC)) | Status | Marking | Package | Package information | Reflow-/Wave soldering | Packing |
|---|---|---|---|---|---|---|---|
| NEX81802DA | NEX81802DAZ (935691936342) |
Active | ND4 |
TSOT23-6FC (SOT8061-1) |
SOT8061-1 | SOT8061-1_342 |
Environmental information
| Type number | Orderable part number | Chemical content | RoHS | RHF-indicator |
|---|---|---|---|---|
| NEX81802DA | NEX81802DAZ | NEX81802DA |
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Series
Documentation (3)
| File name | Title | Type | Date |
|---|---|---|---|
| NEX8180X | Adaptive Synchronous Rectifier (SR) Controller | Data sheet | 2024-09-30 |
| SOT8061-1 | plastic, surface-mounted package; 6 leads; 0.95 mm pitch; 2.9 mm x 1.6 mm x 1.1 mm body | Package information | 2024-04-09 |
| SOT8061-1_342 | TSOT23-6FC; Reel dry pack for SMD, 7"; Q3/T4 product orientation | Packing information | 2024-04-29 |
Support
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Models
No documents available
Ordering, pricing & availability
| Type number | Orderable part number | Ordering code (12NC) | Status | Packing | Packing Quantity | Buy online |
|---|---|---|---|---|---|---|
| NEX81802DA | NEX81802DAZ | 935691936342 | Active | SOT8061-1_342 | 3,000 | Order product |
Sample
As a Nexperia customer you can order samples via our sales organization.
If you do not have a direct account with Nexperia our network of global and regional distributors is available and equipped to support you with Nexperia samples. Check out the list of official distributors.
How does it work?
The interactive datasheets are based on the Nexperia MOSFET precision electrothermal models. With our interactive datasheets you can simply specify your own conditions interactively. Start by changing the values of the conditions. You can do this by using the sliders in the condition fields. By dragging the sliders you will see how the MOSFET will perform at the new conditions set.
NEX81802DA
Adaptive Synchronous Rectifier (SR) controller with 0.5 to 1.5 microseconds turn-on blanking time
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