參數(shù)資料
型號(hào)： TPS65123RGT
廠商： Texas Instruments, Inc.
英文描述： SINGLE-INDUCTOR QUADRUPLE-OUTPUT TFT LCD POWER SUPPLY
中文描述： 單電感翻兩番，輸出TFT LCD電源
文件頁(yè)數(shù)： 17/23頁(yè)
文件大小： 706K
代理商： TPS65123RGT
www.ti.com
APPLICATION INFORMATION
OUTPUT POWER CAPABILITY
The first step in the design procedure is to calculate the maximum output current for each output under certain
input and output voltage conditions. The TPS6512x uses time-multiplex operation to share the inductive storage
element between BOOT, VGH and VGL outputs. To avoid complex calculations it is recommended to use the
specified output-power data from the electrical characteristics table to determine the maximum output-power
capability.
GH
GH
GH
I
V
P
×
=
GL
GL
GL
I
V
P
×
=
5
V
V
for
I
0.5
V
V
P
P
MAIN
IN
MAIN
MAIN
MAIN
MAIN
_
LDO
η
MAIN
BOOT
2
+
<
×
+
≈
×
=
MAIN
V
IN
MAIN
I
IN
MAIN
V
MAIN
_
LDO
η
MAIN
P
BOOT
P
V
for
V
2
>
×
≈
×
=
SETTING THE OUTPUT VOLTAGE
The output voltages are defined as shown in Figure 22.
FBM
MAIN
R6
R6
R5
V
V
+
×
=
FBH
GH
R2
R2
R1
V
V
+
×
=
MAIN
GL
R4
R3
V
V
×
=
TPS65120, TPS65121, TPS65123, TPS65124
SLVS531–JUNE 2004
The following example shows how to proceed for given requirements:
Input Voltage = 3.0 V
MAIN Output = 5.0 V @ 10 mA
VGH output = 12 V @ 500 μA
VGL output = -12 V @ 300 μA
1. Calculate Maximum Output Power on VGH Output
2. Calculate Maximum Output Power on VGL Output
3. Calculate Maximum Output Power on BOOT Output
4. Maximum Output Power Verification
The electrical characteristics table states that for V
IN
> 3.0 V, the maximum power on VGH and VGL outputs
must be lower than 35 mW each. Furthermore, the total output power (P
BOOT
+ P
GH
+ P
GL
) must be lower than
150 mW.
In our design example, P
GH
= 6 mW, P
GL
= 3.6 mW, and P
BOOT
= 55 mW. Since these numbers are well below
the specified values, we can conclude that TPS6512x can reasonably power such a display.
with an internal reference voltage V
FBM
typical = 1.213V.
with an internal reference voltage V
FBH
typical = 1.213V.
To minimize the operating quiescent current, set R2, R4 and R6 in the range 100 k
to 300 k
. Great care
should be taken to route the FBx lines away from noise sources such as the inductor or the SWN and SWP lines.
A feed-forward capacitor across the upper feedback resistor (R1, R3) on VGH and VGL outputs can be used to
provide more overdrive for the error comparator. This feed-forward capacitor helps to reduce the output ripple
voltage. A good starting value is 10 pF.
17
相關(guān)PDF資料
PDF描述
TPS65124RGT SINGLE-INDUCTOR QUADRUPLE-OUTPUT TFT LCD POWER SUPPLY
TPS65130RGE POSITIVE AND NEGATIVE OUTPUT DC-DC CONVERTER
TPS65131RGE POSITIVE AND NEGATIVE OUTPUT DC-DC CONVERTER
TPS65140RGE TRIPLE OUTPUT LCD SUPPLY WITH LINEAR REGULATOR AND POWER GOOD
TPS65145RGE TRIPLE OUTPUT LCD SUPPLY WITH LINEAR REGULATOR AND POWER GOOD
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS65123RGTR 功能描述:LCD 驅(qū)動(dòng)器 Single-Inductor Triple-Output RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
TPS65123RGTRG4 功能描述:LCD 驅(qū)動(dòng)器 Single-Inductor Triple-Output RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
TPS65123RGTT 功能描述:LCD 驅(qū)動(dòng)器 Single-Inductor Triple-Output RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
TPS65123RGTT 制造商:Texas Instruments 功能描述:IC LCD SUPPLY TFT TRIPLE 16-VQFN 制造商:Texas Instruments 功能描述:IC, LCD SUPPLY TFT TRIPLE 16-VQFN
TPS65123RGTT 制造商:Texas Instruments 功能描述:OUTPUT CURRENT MAX:25MA ((NW))
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*