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参数资料
| 型号： | MAX1997ETJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/31页 |
| 文件大小： | 0K |
| 描述： | IC PWR SUPPLY TFT LCD 32TQFN |
| 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： | 2.7 V ~ 5.5 V |
| 输出数： | 5 |
| 输出电压： | 2.7 V ~ 13 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 包装： | 管件 |
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Quintuple/Triple-Output TFT LCD Power Supplies
with Fault Protection and VCOM Buffer
Table 1. Selected Component List
DESIGNATION
C2, C13
C4, C5, C6
D1
D2, D3, D4
D5, D6
L1
N1
P1
Q1
Q2, Q3
Q4
DESCRIPTION
10μF, 6.3V X5R ceramic capacitors (1206), TDK C3216X5R0J106M
4.7μF, 10V X7R ceramic capacitors (1210), Taiyo Yuden LMK352BJ475MF
1.0A, 30V Schottky diode (S-flat), Toshiba CRS02
200mA, 25V dual-series Schottky diodes (SOT23), Fairchild BAT54S
200mA, 75V diode (SOT23), Fairchild MMBD4148
3.0μH, 1.3A inductor, Sumida CLS5D11HP-3R0NC
1.9A, 30V N-channel MOSFET (SuperSOT ? -3), Fairchild FDN357P
2.4A, 20V P-channel MOSFET (SuperSOT-3), Fairchild FDN304P
3A, 25V PNP bipolar transistor (SuperSOT-3), Fairchild FSB749
200mA, 40V PNP bipolar transistors (SOT23), Fairchild MMBT3906
200mA, 40V NPN bipolar transistor (SOT23), Fairchild MMBT3904
SuperSOT is a trademark of Fairchild Semiconductor.
Table 2. Component Suppliers
SUPPLIER
Fairchild
Sumida
Taiyo Yuden
TDK
Toshiba
PHONE
408-822-2000
847-545-6700
800-348-2496
847-803-6100
949-455-2000
FAX
408-822-2102
847-545-6720
847-925-0899
847-390-4405
949-859-3963
WEBSITE
www.fairchildsemi.com
www.sumida.com
www.t-yuden.com
www.component.tdk.com
www.toshiba.com
Standard Application Circuit
The standard application circuit (Figure 1) of the
MAX1997 is a complete power-supply system for TFT
liquid-crystal displays. The circuit generates 9V for source
drivers, +20V and -7V for gate drivers, a 2.5V logic supply
for the timing controller, a 8.6V gamma reference voltage,
and a VCOM buffer. The input voltage range is from 2.7V
to 5.5V. Table 1 lists the selected component options and
Table 2 lists the component suppliers.
Detailed Description
The MAX1997 and MAX1998 contain a high-perfor-
mance step-up switching regulator, two low-cost linear-
regulator controllers, and multiple levels of protection
circuitry. The MAX1997 also includes two additional lin-
ear-regulator controllers and a high-current VCOM
buffer. Figure 2 shows the MAX1997/MAX1998 system
functional diagram. The output voltage of the main
step-up regulator (V MAIN ) can be set from V IN to 13V
with an external resistive voltage-divider. High switch-
ing frequency (375kHz/750kHz/1.5MHz) and current-
mode control provide fast transient response and allow
the use of low-profile inductors and ceramic capacitors.
The low R DS(ON) internal power MOSFET minimizes the
external component count and achieves high efficiency
using a lossless current-sense architecture.
Two charge pumps take energy from the main step-up
regulator ’ s switching node (LX) to generate positive and
negative supplies. Additional capacitor and diode stages
can be used to generate supply voltages greater than
+35V and less than -15V. The positive and negative
linear-regulator controllers postregulate the charge-pump
supply voltages and allow users to program the power-up
sequence as well.
The high-current VCOM buffer of the MAX1997 is ideal for
driving the backplane of a TFT LCD panel. It requires only
a 0.47μF ceramic output capacitor for stability. The
MAX1997 ’ s two additional linear-regulator controllers can
be used to build the gamma reference and logic supply.
The unique input switch control of the MAX1997/
MAX1998 senses the current drawn from the input
power supply by monitoring the voltage drop across
the input P-channel MOSFET. The protection MOSFET
and all regulator outputs latch off if an overcurrent
condition lasts for more than the fault timer period.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1997ETJ+ | 功能描述:其他电源管理 Quint/Triple-Out TFT LCD Power Supply RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| MAX1997ETJ+T | 功能描述:LCD 驱动器 Quint/Triple-Out TFT LCD Power Supply 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 |
| MAX1997ETJ-T | 功能描述:其他电源管理 RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| MAX1997EVKIT | 制造商:Maxim Integrated Products 功能描述:QUINTUPLE/TRIPLE OUTPUT TFT LCD POWER SUPPLIE - Bulk |
| MAX19983A | 功能描述:上下转换器 RoHS:否 制造商:Texas Instruments 产品:Down Converters 射频:52 MHz to 78 MHz 中频:300 MHz LO频率: 功率增益: P1dB: 工作电源电压:1.8 V, 3.3 V 工作电源电流:120 mA 最大功率耗散:1 W 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-128 |
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