- 您现在的位置：买卖IC网 > PDF目录69522 > TPS65230A2DCA (TEXAS INSTRUMENTS INC) 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO48 PDF资料下载
参数资料
| 型号： | TPS65230A2DCA |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO48 |
| 封装： | GREEN, HTSSOP-48 |
| 文件页数： | 8/29页 |
| 文件大小： | 1195K |
| 代理商： | TPS65230A2DCA |
第1页第2页第3页第4页第5页第6页第7页当前第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页
0
0.5
1
1.5
2
2.5
3
3.5
0
0.5
1
1.5
2
2.5
3
3.5
Curr ent from BUCK2 [A] @ 1.2V or less
C
u
rr
e
n
t
fr
o
m
B
U
C
K
3
[A
]
@
3
.3
V
S afe Operating Area
0
0.5
1
1.5
2
2.5
3
3.5
0
0.5
1
1.5
2
2.5
3
3.5
Curr ent from BUCK2 [A] @ 1.8V
C
u
r
re
n
t
fr
o
m
B
U
C
K
3
[A
]
@
3
.3
V
Safe Operat ing Area
0
0.5
1
1.5
2
2.5
3
3.5
0
0.5
1
1.5
2
2.5
3
3.5
Curre nt from BUCK2 [A] @ 2.5V
C
u
rr
e
n
t
fr
o
m
B
U
C
K
3
[A
]
@
3
.3
V
Sa fe Operating Area
For any voltage / current comination inside the shaded area, the dissipated power inside the chip is below the allowable
maximum. The examples assume T
< 60°C,
= 90% and
< 44°C/W.
ambient
JA
h
q
COMPONENT SELECTION PROCEDURE
SLVSA10A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009.................................................................................................................................... www.ti.com
A minimum of two layers of 1-oz Cu with 20% Cu coverage on the top and 90% coverage on the bottom and the
use of thermal vias to connect the thermal pad to the bottom layer is recommended. Note that the maximum
allowable power inside the device will depend on the board layout. For recommendations on board layout for
thermal management using TPS6523x consult your TI field application engineer.
In the example shown above the maximum allowable power dissipation for the IC has been calculated. This
figure includes all heat sources inside the device including the power dissipated in BUCK1, BUCK2, BUCK3,
USB switches, and all supporting circuitry. Power dissipated in BUCK1, USB switches (500 mA full load) , and all
supporting circuitry is approximately 0.4 W and almost independent of the application. Power dissipated in
BUCK2 and BUCK3 depends on the output voltage, output current, and efficiency of the switching converters.
The following examples of safe operating area assume 90% efficiency for BUCK2 and BUCK3, 3.3-V output from
BUCK3 and 1.2-V, 1.8-V, and 2.5-V output from BUCK2, respectively.
Figure 9. Examples of Thermal Safe Operating Area for V(BUCK3) = 3.3 V and V(BUCK1) = 1.2 V, 1.8 V
and 2.5 V, Respectively
The following example illustrates the design procedure for selecting external components for the three buck
converters. The example focuses on BUCK1 but the procedure can be directly applied to BUCK2 and 3 as well.
The design goal parameters are given in the table below. A list of symbol definitions is found at the end of this
section. For this example the schematic in Figure 10 will be used.
16
Copyright 2009, Texas Instruments Incorporated
相关PDF资料 |
PDF描述 |
|---|---|
| TPS65230A2DCAR | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO48 |
| TPS65231A2DCAR | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO48 |
| TPS65230DCA | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO48 |
| TPS65230DCAR | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO48 |
| TPS65232A2DCA | POWER SUPPLY SUPPORT CKT, PQCC48 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS65230A2DCAR | 功能描述:PMIC 解决方案 Pwr Mgmt IC for Dig Set Top Boxes RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| TPS65231A2DCA | 功能描述:PMIC 解决方案 Pwr Mgmt IC for Dig Set-Top Boxes RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| TPS65231A2DCAR | 功能描述:PMIC 解决方案 Pwr Mgmt IC for Dig Set-Top Boxes RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| TPS65232A0RHA | 功能描述:PMIC 解决方案 Wide Inp Vltg PMU RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| TPS65232A0RHAR | 功能描述:PMIC 解决方案 Wide Inp Vltg PMU RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。