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Half-bridge for space constrained DC-DC converter designs

Half-bridge for space constrained DC-DC converter designs

New Products |
By Nick Flaherty



Alpha and Omega Semiconductor (AOS) has developed a half bridge for space-constrained DC-DC applications, saving 60% of the footprint.

The AONG36322 XSPairFET uses two 30V MOSFETs in a half-bridge configuration where the high-side and the low-side MOSFETs are in an asymmetric DFN3.5×5 XSPairFET package.

This design allows the AONG36322 to replace an existing DFN5x6 asymmetric half-bridge MOSFET with an approximate 60 percent saving in the PCB footprint to further streamline the DC-DC architecture, resulting in a more efficient design. The package design also delivers lower parasitic inductance, significantly reducing switch node ringing.

These benefits make the AONG36322 ideal for a new generation of smaller DC-DC buck converters in more compact applications such as point-of-load (POL) computing, USB hubs, and power banks.

Chip scale packaging boost for fast charging

The AONG36322 is an extension to the AOS XSPairFET lineup, designed with the latest bottom-source packaging technology. Its integrated high-side and low-side MOSFETs feature 4.5 mOhms and 1.3 mOhms maximum on-resistance, respectively, where the low-side MOSFET source is connected directly to the exposed pad on the PCB to enhance thermal dissipation.

“We designed the AONG36322 in the DFN3.5×5 package to help our customers meet their ongoing board space limitations. Our breakthrough AOS XSPairFET design also gives them the benefit of improved power density and efficiency to overcome the challenge developers face in meeting ever-increasing POL Buck application performance goals,” said Peter H. Wilson, Marketing Sr. Director of MOSFET product line at AOS.

Alpha Omega enters SiC MOSFET market

 

Part Number

Package

VDS (V)

VGS (±V)

RDS(ON) (mΩ max) at VGS=

Ciss (pF)

Coss (pF)

Crss (pF)

Qg (nC)

10V

4.5V

AONG36322

DFN 3.5×5

High Side (Q1)

30

20

4.5

8.0

1150

380

555

7.5

Low Side (Q2)

30

12

1.3

1.75

4180

880

125

30

Pricing and Availability

The AONG36322 is immediately available in production quantities with a lead time of 16 weeks. The unit price in 1,000-piece quantities is $0.915.

www.aosmd.com.

 

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