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參數(shù)資料
| 型號(hào)： | TPS65124RGT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.2 A SWITCHING REGULATOR, 4000 kHz SWITCHING FREQ-MAX, PQCC16 |
| 封裝： | 3 X 3 MM, 0.90 MM HEIGHT, PLASTIC, QFN-16 |
| 文件頁數(shù)： | 1/30頁 |
| 文件大?。?/td> | 1047K |
| 代理商： | TPS65124RGT |
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FEATURES
APPLICATIONS
DESCRIPTION
SWN
TPS65123
D1
L1
10
C1
2.2
V
IN
2.7 V to 5.5 V
V
GL
down to 18 V/2 mA
C3
100 nF
R4
R3
SWP
FBL
VMAIN
FBM
C5
220 nF
R6
R5
V
MAIN
3.0 V to 5.3 V/25 mA
C4
1
BOOT
VGH
C2
100 nF
V
GH
up to 20 V/2 mA
PGND
AGND
FBH
RUN
EN
VIN
A
GATE
R2
R1
F
F
H
0.1
0.5
0.9
4.0
8.0
12.0
16.0
20.0
24.0
2.3
2.4
2.6
2.8
3.2
4.0
4.7
5.2
5.5
0
10
20
30
40
50
60
70
80
90
100
Core
Converter
Efficiency
%
VIN Input Voltage V
IBOOT Load Current mA
TPS65120, TPS65121, TPS65123, TPS65124
SLVS531A – JUNE 2004 – REVISED MARCH 2005
SINGLE-INDUCTOR QUADRUPLE-OUTPUT
TFT LCD POWER SUPPLY
Automatic or Programmable Power
Sequencing
Main Output, VMAIN
Complete 1 mm Component Profile Solution
– Adjustable Voltage, 3.0 V to 5.6 V/25 mA
2.5 V to 5.5 V Input Voltage Range
– Post-Regulated for Low Ripple (5mVPP)
Output Short Circuit Protected
– ±0.8% Typical Accuracy
– Efficiency up to 83%
16-Pin QFN Package (3 × 3 × 0,9 mm)
Positive Output, VGH
– Adjustable Voltage up to 20 V/2 mA
Small Form Factor a-Si and LTPS TFT LCD
– ±3% Typical Accuracy
Cell Phones, Smart Phones
Negative Output, VGL
PDAs, Pocket PCs
– Adjustable Voltage down to -18 V/2 mA
Portable DVD
– ±3% Typical Accuracy
Digital-Still Cameras, Camcorders
Auxiliary 1.8 V/3.3 V Linear Regulator
Handheld Instruments
Portable GPS
Car Navigation Systems
The TPS6512x DC-DC converter supplies all three voltages required by amorphous-silicon (a-Si) and
low-temperature poly-silicon (LTPS) TFT-LCD displays. The compact layout of the TPS6512x uses a single
inductor to generate independently-regulated positive and negative outputs. A free-running variable peak current
PWM control scheme time-multiplexes the inductor between outputs. This control architecture operates at a
pseudo-fixed-frequency to provide fast response to line and load transients while maintaining a relatively
constant switching frequency and high efficiency over a wide range of input and output voltages. Due to the high
switching frequency capability of the device, inexpensive and ultra-thin 8.2 or 10 H inductors can be used.
The main output, VMAIN, is post-regulated to provide a low-ripple source drive voltage for the LCD display. The
auxiliary outputs generate a boosted output voltage, VGH, up to 20 V, and a negative output voltage, VGL, down to
-18 V for the LCD gate drive. The device has internal current limiting for high reliability under fault conditions.
Additionally, the device offers a fixed output linear regulator for the LCD logic circuitry.
Figure 1. Typical Application
Figure 2. Core Converter Efficiency
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright 2004–2005, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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