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參數(shù)資料
| 型號： | TPS2340APFPRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PQFP80 |
| 封裝： | GREEN, PLASTIC, HTQFP-80 |
| 文件頁數(shù)： | 14/29頁 |
| 文件大?。?/td> | 578K |
| 代理商： | TPS2340APFPRG4 |
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TPS2340A
SLUS528A MARCH 2002 REVISED AUGUST 2002
21
www.ti.com
APPLICATION INFORMATION
package information
The TPS2340A dissipates very little heat under normal operating conditions. However, when the TPS2340A
is used with a load that exceeds PCI specifications either due to a fault or a specification violation, power
dissipation increases as the square of load current. To allow reliable operation with high power dissipation, the
TPS2340A is packaged in a PowerPAD
t molded quad flat pack with heat-conducting tab on the underside. This
package offers thermal resistance from junction to case of approximately 8
°C/W. In a typical layout, thermal
resistance from junction to ambient is approximately 35
°C/W.
For optimum heat conduction and system reliability, the heat-conducting tab should be soldered directly to a
10-mm square copper area on the circuit board tied to M12VIN voltage potential. To increase heat conduction,
add plated vias to the copper area directly under the part and connect these vias to copper planes around 100%
of their perimeter. These vias conduct heat away from the top layer of the circuit board and into other layers and
should not use thermal reliefs (also known as thermals or webs). To prevent solder wicking into the vias, the
vias should either be drilled to a size small enough to allow complete filling of the vias during hole plating or
should be covered by solder mask on the back of the circuit board.
The TPS2340A TQFP80 package conforms to JEDEC MS026. For more information on the PowerPAD
package, consult TI PowerPAD Technical Brief (SLMA002).
device testability
Table 11. Test Mode Configuration
PGOOD
TEST
SODO/MODE1
SIDO/MODE0
OPERATING MODE
↑
0
MODE1
MODE0
Normal operation mode, latch MODE inputs
1
0
SODO
SIDO
Normal operation mode, drive SODO and SIDO
↑
1
0
NAND tree test mode
↑
1
0
1
Tristate test mode (all pins tri-stated)
↑
1
X
Reserved
1
SODO
SIDO
Normal operation, but Pwrenx driven on PWRLEDx, Faultx
driven on ATTLEDx.
NOTE:
X = Don’t care, x = slot A or B; shaded cells signify test modes.
When TEST is asserted after PGOOD is asserted, the device enters a run-time test mode. When this test mode
is enabled, the slot-specific PWRLEDx output asserts when the slot’s internal Pwrenx signal is asserted.
Similarly, the ATTLEDx output asserts when the corresponding ANDed slot Faultx signal is asserted.
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| TPS2342PFPR | 功能描述:熱插拔功率分布 Hot Plug Power Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
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