- 您现在的位置：买卖IC网 > PDF目录13122 > MAX1543ETP+ (Maxim Integrated Products)IC DC-DC CONV TFT-LCD 20-TQFN PDF资料下载
参数资料
| 型号： | MAX1543ETP+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/20页 |
| 文件大小： | 0K |
| 描述： | IC DC-DC CONV TFT-LCD 20-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 应用： | 控制器，TFT LCD |
| 输入电压： | 2.6 V ~ 5.5 V |
| 输出数： | 2 |
| 输出电压： | 2.6 V ~ 13 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP（5x5） |
| 包装： | 管件 |
TFT LCD DC-to-DC Converter with
Operational Amplifiers
Table 1. Component List
DESIGNATION
C1
C8, C9
D1
D2, D3, D4
L1
DESCRIPTION
10μF ±10%, 6.3V X5R ceramic capacitor
4.7μF ±10%, 10V X5R ceramic capacitors
1A, 30V Schottky diode
200mA, 100V dual ultra-fast diodes
4.7μH, 1.3A inductor
PART
TDK C3216X5R0J106K
TDK C3225X5R1A475K
Toshiba CRS02
Fairchild MMBD4148SE
Sumida CLS5D11HP-4R7
Table 2. Component Suppliers
SUPPLIER
PHONE
FAX
WEBSITE
Inductors
Sumida USA
847-956-0666
847-956-0702
www.sumida.com
Capacitors
TDK
847-803-6100
847-803-6296
www.component.tdk.com
Diodes
Fairchild
Toshiba
888-522-5372
949-455-2000
408-822-2104
949-859-3963
www.fairchildsemi.com
www.toshiba.com/taec/
D ≈ MAIN IN
The regulator controls the output voltage and the power
delivered to the outputs by modulating the duty cycle
(D) of the power MOSFET in each switching cycle. The
duty cycle of the MOSFET is approximated by:
V ? V
V MAIN
The device regulates the output voltage through a com-
bination of an error amplifier, two comparators, and
several signal generators (Figure 3). The error amplifier
compares the signal at FB to 1.24V and varies the
COMP output. The voltage at COMP determines the
current trip point each time the internal MOSFET turns
on. As the load varies, the error amplifier sources or
sinks current to the COMP output accordingly to pro-
duce the inductor peak current necessary to service
the load. To maintain stability at high duty cycles, a
slope compensation signal is summed with the current-
sense signal.
Operational Amplifiers
The MAX1542/MAX1543 include two operational ampli-
fiers that are typically used to drive the LCD backplane
VCOM and/or the gamma correction divider string. The
operational amplifiers feature ±150mA output short-cir-
cuit current, 7.5V/μs slew rate, and 12MHz bandwidth.
The rail-to-rail inputs and outputs maximize flexibility.
Short-Circuit Current Limit
The MAX1542/MAX1543 operational amplifiers limit
short-circuit current to ±150mA if the output is directly
shorted to SUP or AGND. In such a condition, the junc-
tion temperature of the IC rises until it reaches the ther-
mal shutdown threshold, typically +160 ° C. Once it
reaches this threshold, the IC shuts down and remains
inactive until IN falls below V UVLO .
Driving Pure Capacitive Loads
The operational amplifiers are typically used to drive
the LCD backplane (VCOM) or the gamma correction
divider string. The LCD backplane consists of a distrib-
uted series capacitance and resistance, a load easily
driven by the operational amplifiers. However, if the
operational amplifiers are used in an application with a
pure capacitive load, steps must be taken to ensure
stable operation.
As the operational amplifier ’ s capacitive load increases,
the amplifier bandwidth decreases and gain peaking
increases. A small 5 ? to 50 ? resistance placed between
OUT_ and the capacitive load reduces peaking but
reduces the amplifier gain. An alternative method of
reducing peaking is the use of a snubber circuit. A 150 ?
and 10nF (typ) shunt load, or snubber, does not continu-
ously load the output or reduce amplifier gain.
______________________________________________________________________________________
11
相关PDF资料 |
PDF描述 |
|---|---|
| RSM25DRUS | CONN EDGECARD 50POS DIP .156 SLD |
| RPR20-2415S-1F | CONV DC/DC 20W 12-36VIN 15VOUT |
| EMC26DRYH-S734 | CONN EDGECARD 52POS DIP .100 SLD |
| 400VXH150MEFCSN22X30 | CAP ALUM 150UF 400V 20% SNAP-IN |
| EMM15DSUS | CONN EDGECARD 30POS DIP .156 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1543ETP+ | 功能描述:LCD 驱动器 TFT LCD DC/DC Conv w/Op Amps RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| MAX1543ETP+T | 功能描述:LCD 驱动器 TFT LCD DC/DC Conv w/Op Amps RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| MAX1543ETP-T | 功能描述:LCD 驱动器 RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| MAX1543EVKIT | 功能描述:显示开发工具 MAX1542/3 Eval Kit RoHS:否 制造商:4D Systems 产品:4Display Shields 工具用于评估:?OLED-160-G1, ?OLED-160-G2 接口类型:Serial 工作电源电压:5 V |
| MAX1544ETL | 功能描述:电压模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。