參數(shù)資料
型號(hào)： TPS65121RGT
廠(chǎng)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)： 18/23頁(yè)
文件大?。?/td> 706K
代理商： TPS65121RGT
www.ti.com
SWN
TPS65120
D1
L1
10
C1
2.2
VIN
2.7 V to 5.5 V
VGL
down to 18 V/2 mA
C3
100 nF
R4
R3
SWP
FBL
VMAIN
FBM
BOOT
C5
220 nF
R6
R5
VMAIN
3.0 V to 5.3 V/25 mA
C4
1
VGH
C2
100 nF
VGH
up to 20 V/2 mA
PGND
AGND
FBH
RUN
EN
VAUX
3.3 V/20 mA
VIN
A
A
GATE
LDOIN
LDOOUT
C6
220 nF
R1
R2
μ
F
μ
F
H
μ
INDUCTOR SELECTION
Since the control scheme of the TPS6512x device is inherently stable, the inductor value does not affect the
stability of the converter. To operate the TPS6512x properly at full performance, choose inductors in the range
8.2 μH to 10 μH.
TPS65120, TPS65121, TPS65123, TPS65124
SLVS531–JUNE 2004
APPLICATION INFORMATION (continued)
The larger the feed-forward capacitor the worse the load regulation of the device. Therefore, when concern for
load regulation is paramount, select a capacitor value as small as possible. Another possibility to further reduce
ripple voltage on VGH and VGL outputs is to increase output-capacitor values (C2, C3).
Figure 22. Typical Application
The selection of the inductor is primarily based on the required output power. The variable peak current PWM
control scheme used in TPS6512x automatically adapts the peak inductor current (between 65mA typ. and
150mA typ.) depending on output power and input voltage.
At moderate loads, the converter typically operates with a peak inductor current in the range of 65mA to 100mA,
allowing the use of inductors in the 0603 case size. In order not to saturate the inductor when operating at a
higher output power, select an inductor with a higher saturation-current rating.
The inductor series in Table 1 from various suppliers have been used with the TPS6512x converter.
Table 1. List of Inductors
MANUFACTURER
SERIES
LQ LB1608
LQ CB2012
LQ CBL2012
GLF1608
GLF2012
DIMENSIONS
1.6 x 0.8 x 0.8 = 1.02 mm
3
2.0 x 1.2 x 1.2 = 2.88 mm
3
2.0 x 1.2 x 1.0 = 2.40 mm
3
1.6 x 0.8 x 0.8 = 1.02 mm
3
2.0 x 1.2 x 1.2 = 2.88 mm
3
TAIYO YUDEN
TDK
18
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS65121RGTR 功能描述:LCD 驅(qū)動(dòng)器 Sgl-Inductor Qd-Otp Supply 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
TPS65121RGTRG4 功能描述:LCD 驅(qū)動(dòng)器 Sgl-Inductor Qd-Otp Supply 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
TPS65121RGTT 功能描述:LCD 驅(qū)動(dòng)器 Sgl-Inductor Qd-Otp Supply 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
TPS65121RGTTG4 功能描述:LCD 驅(qū)動(dòng)器 Sgl-Inductor Qd-Otp Supply 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
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
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