JP2003528449A - ゲートドライバマルチチップモジュール - Google Patents
ゲートドライバマルチチップモジュールInfo
- Publication number
- JP2003528449A JP2003528449A JP2001568664A JP2001568664A JP2003528449A JP 2003528449 A JP2003528449 A JP 2003528449A JP 2001568664 A JP2001568664 A JP 2001568664A JP 2001568664 A JP2001568664 A JP 2001568664A JP 2003528449 A JP2003528449 A JP 2003528449A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- module
- mosfet
- mcm
- power mosfets
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
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- H01L24/42—Wire connectors; Manufacturing methods related thereto
- H01L24/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L24/49—Structure, shape, material or disposition of the wire connectors after the connecting process of a plurality of wire connectors
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- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1588—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load comprising at least one synchronous rectifier element
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- Engineering & Computer Science (AREA)
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Abstract
Description
コンピュータマザーボード用のMCM電源回路に関する。
能を犠牲にすることなく、コンピュータマザーボード上の電源回路のサイズを縮
小することが望ましいであろう。
を含む関連受動素子とを含み、すべてボールグリッドアレイ(BGA)基板上に装着
され、単一のチップにパッケージされたMCMを提供する。
で接続される。MOSFETゲートドライバは、2つのパワーMOSFETそれぞれのゲート
入力に接続され、パワーMOSFETを交互に切り替えて、パワーMOSFET間の共通出力
ノードで交流出力電圧を生成する。少なくとも1つのショットキーダイオードがB
GA基板上に配置され、共通出力ノードと接地との間に接続されて、デッドタイム
(deadtime)の導通期間中の損失を最小限に抑える。
含まれ、この入力コンデンサはコンバータに入力キャパシタンスを提供する。有
利には、入力コンデンサが他のすべての構成部品と物理的に近接している。追加
の構成部品は、適切なバイアシング(biasing)をゲートドライバに提供する。す
べての構成部品はモールディングコンパウンドに入れられて、MCMパッケージを
形成する。
装着することにより、以下のようないくつかの利点が実現される。
り、これにより、MOSFET寄生キャパシタンスCossおよび浮遊インダクタンスLを
含む回路内で引き起こされる「リング」が低減される。インダクタンスを低減す
ると、回路リングも低減される。
イアウト独立性がもたらされ、もはやマザーボードはそのコンデンサを(MCMパッ
ケージ内のMOSFETから離して)含む必要がない。
図されない電流(高di/dtを有する)の導通に対するバイパスとして働き、MOSFET
のQRR(逆回復電荷)をクランプするのを助ける働きをする。
ケージに封入することが好ましい。したがって、入力コンデンサはMOSFETから1c
m未満のところに位置する。
板(PCB)から独立しているので有利である。このパッケージは、ディスクリート
の解決法に勝る性能向上をもたらすので有利である。
であろう。以下の説明では、添付の図面を参照する。
る。MCM2は、BGA基板4上に装着された6つのダイ(die)を備える。基板4の上部
表面には、複数のボンディングパッド6が配置されている。
れぞれ好ましくはIRFC7811AおよびIRFC7809AパワーMOSFETである。ダイ12はMOSF
ETゲートドライバであり、好ましくはSemtech SC1405 High Speed Synchronous
Power MOSFET Smart Driverである。ダイ14、16、18は、図3の回路図に示すよう
に接続されるショットキーダイオードであり、好ましくはSKM863ダイオードであ
る。基板4の上部表面上に装着された能動構成部品は、ワイヤボンド20を使用し
て対応するボンディングパッド6に電気接続される。
含まれ、これらもまた図3の回路図に示すように接続される。図では、受動構成
部品が対応するパッド6に直接接合されている。重要なことに、コンデンサC4はM
OSFET8および10の近くに装着される。
2が、基板4の下部表面上に配置されている。完成したパッケージでは、基板4の
上部表面上の構成部品は、Nitto HC 100などモールドコンパウンド24内にカプセ
ル化される。ハウジング2の寸法は約1cm×1cmであり、したがってマザーボード
上で占める空間が非常に少ない。
、ハーフブリッジ構成で装着され、入力電圧VINと接地PGNDとの間に直列接続さ
れる。外部回路キャパシタンスCEXTが、VINに接続される。MOSFETゲートドライ
バ12のハイサイド出力ゲートドライブTGが、ハイサイドパワーMOSFET8のゲート
入力20に接続される。MOSFETゲートドライバ12のローサイド出力ゲートドライブ
BGが、ローサイドパワーMOSFET10のゲート入力22に接続される。ゲートドライバ
12は、パワーMOSFETを交互に切り替えて、パワーMOSFET間の共通出力ノードSW N
ODEで交流出力電圧を生成する。
に接続されて、デッドタイムの導通期間中の損失を最小限に抑える。入力コンデ
ンサC4が、入力電圧VINと接地PGNDとの間に接続される。2つの並列ダイオード16
および18の使用は、構成部品の対称的なレイアウトを維持するのに役立つ。一般
に、出力インダクタ30がSW NODEと出力電圧端子VOUTとに接続されることになる
。出力回路内には出力コンデンサCOUTもある。
キーダイオード14、およびブートストラップピンBSTとDRNピンとの間に接続され
た抵抗器R1/コンデンサC2で構成されるブートストラップ回路が設けられ、ハイ
サイドMOSFET8のためのフローティングブートストラップ電圧を発生させる。
る。デバイスの動作は、MOSFETドライバ12のイネーブルピンEN上で最低2.0ボル
トを供給することによってイネーブルになる。ステータスピンPRDYは、+5Vの供
給電圧のステータスを示す。供給電圧が4.4V未満のときは、この出力はローに駆
動される。供給電圧が4.4Vよりも大きいときは、この出力がハイに駆動される。
この出力は、10mAのソースおよび10μAの能力を有する。PRDYがローのときは、
ドライバ12に内蔵の不足電圧(undervoltage)回路が、ドライバ出力TGとBGが両
方ともローであることを保証する。
ターンオン遅延tD(ON)が、MCM2の信号入力DRV_INと出力SW NODEとの間に存在す
る。通常26ナノ秒のターンオフ遅延tD(OFF)が、MCM2の信号入力DRV_INと出力SW
NODEとの間に存在する。遅延の一部はドライバ12固有のものである。
ルトまでの間の入力電圧を用いることができ、0.9〜2.0Vの範囲の出力を提供す
る。出力電流は、通常15Aである。デバイスは、300〜1000kHzの周波数で動作す
る。
いることによって大きく向上する。
イアウト上の柔軟性が増す。
ダクタンスは、C4がチップの外のマザーボード上に位置する場合に生じる浮遊イ
ンダクタンスと比較して低減される。この近接した位置付け(約1センチ以下)に
より、回路内の「リング」が実質的に減少する。より具体的には、図3に示すよ
うに、MOSFET10は寄生キャパシタンスCOSSを有する。浮遊インダクタンスLおよ
びCOSSを含む回路は、その共振周波数でリンギングする傾向がある。Lを低減す
ることにより、このリングもまた低減される。
charge)をクランプし、高di/dtがモジュール2から出てマザーボード内に流れな
いようにすることである。より具体的には、図3Aは、図3の一部に相当する回路
であり、MOSFET10の内蔵ダイオードを特に示している。デッドタイム中、MOSFET
8も10もオフの間、図3のショットキーダイオード16および18を介して導通が生じ
るが、いくらかの「残留」電流もMOSFET10の内蔵ダイオードを介して導通する。
MOSFET10の内蔵ダイオードが導通している間にMOSFET8がオンになると、逆回復
電流が外部コンデンサCEXTから非常に高いdi/dtで供給されることになる。しか
し、コンデンサC4が、この高di/dtに対するバイパスとして働く。図3のコンデン
サC4も同様の目的を果たす。
よび修正、ならびに他の使用法も、当業者には明らかになるであろう。
る。
Claims (8)
- 【請求項1】 コンピュータマザーボード上に電源回路を提供するためのマ
ルチチップモジュール(MCM)であって、 ボールグリッドアレイ(BGA)基板と、 当該BGA基板上に配置され、入力電圧と接地との間にハーフブリッジ構成で接
続された2つのパワーMOSFETと、 前記BGA基板上に配置され、前記2つのパワーMOSFETそれぞれのゲート入力に電
気接続され、前記パワーMOSFETを交互に切り替えて、前記パワーMOSFET間の共通
出力ノードで交流出力電圧を生成するMOSFETゲートドライバと、 前記BGA基板上に配置され、前記共通出力ノードと接地との間に接続されて、
デッドタイムの導通期間中の損失を最小限に抑える少なくとも1つのダイオード
と、 前記基板上に配置され、前記入力電圧と接地との間に接続された入力コンデン
サとを備えていることを特徴とするモジュール。 - 【請求項2】 前記共通出力ノードと接地との間に前記ダイオードと並列接
続された別のダイオードをさらに備えていることを特徴とする請求項1に記載の
モジュール。 - 【請求項3】 前記基板が約1cm×1cm以下の面積を有していることを特徴と
する請求項1に記載のモジュール。 - 【請求項4】 前記入力コンデンサが前記MOSFETから1cm未満だけ離間され
ていることを特徴とする請求項1に記載のモジュール。 - 【請求項5】 前記入力コンデンサが前記第1および第2のMOSFETに隣接して
位置することを特徴とする請求項1に記載のモジュール。 - 【請求項6】 前記基板と、前記MOSFETと、前記ゲートドライバと、前記少
なくとも1つのダイオードとを封入する絶縁ハウジングをさらに備え、マザーボ
ードに装着されるようにボールグリッドアレイが前記ハウジングの底を通って露
出していることを特徴とする請求項1に記載のモジュール。 - 【請求項7】 前記ハウジングが約1cm×1cm以下の面積を有していることを
特徴とする請求項6に記載のモジュール。 - 【請求項8】 前記入力コンデンサが前記第1および第2のMOSFETに隣接して
位置していることを特徴とする請求項6に記載のモジュール。
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---|---|---|---|
US19112500P | 2000-03-22 | 2000-03-22 | |
US60/191,125 | 2000-03-22 | ||
PCT/US2001/008989 WO2001072092A1 (en) | 2000-03-22 | 2001-03-21 | Gate driver multi-chip module |
Publications (2)
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JP2003528449A true JP2003528449A (ja) | 2003-09-24 |
JP3943395B2 JP3943395B2 (ja) | 2007-07-11 |
Family
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JP2001568664A Expired - Lifetime JP3943395B2 (ja) | 2000-03-22 | 2001-03-21 | ゲートドライバマルチチップモジュール |
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---|---|
US (3) | US20020021560A1 (ja) |
JP (1) | JP3943395B2 (ja) |
CN (1) | CN1284421C (ja) |
AU (1) | AU2001247631A1 (ja) |
TW (1) | TWI250406B (ja) |
WO (1) | WO2001072092A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
CN1284421C (zh) | 2006-11-08 |
JP3943395B2 (ja) | 2007-07-11 |
AU2001247631A1 (en) | 2001-10-03 |
TWI250406B (en) | 2006-03-01 |
US20030016505A1 (en) | 2003-01-23 |
US6879491B2 (en) | 2005-04-12 |
US20020021560A1 (en) | 2002-02-21 |
CN1419798A (zh) | 2003-05-21 |
WO2001072092A1 (en) | 2001-09-27 |
USRE42658E1 (en) | 2011-08-30 |
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