Invention Grant
US09171828B2 DC-DC converter having terminals of semiconductor chips directly attachable to circuit board
有权
DC-DC转换器具有可直接连接到电路板的半导体芯片的端子
- Patent Title: DC-DC converter having terminals of semiconductor chips directly attachable to circuit board
- Patent Title (中): DC-DC转换器具有可直接连接到电路板的半导体芯片的端子
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Application No.: US14481204Application Date: 2014-09-09
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Publication No.: US09171828B2Publication Date: 2015-10-27
- Inventor: Osvaldo Jorge Lopez , Jonathan Almeria Noquil
- Applicant: Texas Instruments Incorporated
- Applicant Address: US TX Dallas
- Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee Address: US TX Dallas
- Agent Steven A. Shaw; Charles A. Brill; Frank D. Cimino
- Main IPC: H01L21/50
- IPC: H01L21/50 ; H01L25/16 ; H01L25/00 ; H01L23/495 ; H01L23/00 ; H01L21/56 ; H01L25/07 ; H01L23/31
Abstract:
A power supply system (200) has a QFN leadframe with leads and a pad (201). The pad surface facing a circuit board has a portion recessed with a depth (270) and an outline suitable for attaching side-by-side the sync (210) and the control (220) FET semiconductor chips. The input terminal (220a) of the control FET and the grounded output terminal (210a) of the sync FET are coplanar with the un-recessed portion of the pad (switch node terminal) so that all terminals can be directly attached to contacts of a circuit board. A driver-and-control chip (230) is vertically stacked to the opposite pad surface and encapsulated in a packaging compound (290).
Public/Granted literature
- US20150221622A1 DC-DC CONVERTER HAVING TERMINALS OF SEMICONDUCTOR CHIPS DIRECTLY ATTACHABLE TO CIRCUIT BOARD Public/Granted day:2015-08-06
Information query
IPC分类:
