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| 型号： | MAX8798ETX+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 17/31页 |
| 文件大小： | 0K |
| 描述： | IC INTERNAL-SW BOOST REG 36-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | LCD 监视器，笔记本电脑显示器 |
| 电流 - 电源： | 400µA |
| 电源电压： | 1.8 V ~ 6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-WFQFN 裸露焊盘 |
| 供应商设备封装： | 36-TQFN 裸露焊盘（6x6） |
| 包装： | 带卷 (TR) |
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Internal-Switch Boost Regulator with
Integrated 3-Channel Scan Driver for TFT LCDs
Typical Application Circuit
The MAX8798 typical application circuit (Figure 2) gener-
ates a +8V source-driver supply and approximately +20V
and -12V gate-driver supplies for TFT displays. The input-
voltage range for the IC is from +1.8V to +5.5V; however,
the Figure 2 circuit is designed to operate from 2.2V to
3.6V. Table 1 lists recommended components and Table
2 lists contact information of component suppliers.
Table 1. Component List
Detailed Description
The MAX8798 contains a high-performance step-up
switching regulator; one high-speed operational ampli-
fier; one three-channel, high-voltage level-shifting scan
driver for active-matrix TFT LCDs; and an I 2 C-controlled
VCOM calibrator. Figure 3 shows the MAX8798 func-
tional diagram.
Step-Up Regulator
The step-up regulator employs a current-mode, fixed-
frequency PWM architecture to maximize loop band-
width and provide fast transient response to pulsed
DESIGNATION
C1
C21, C22
D1
D2 –D5
L1
DESCRIPTION
10 μF, 6.3V X5R ceramic capacitor (1206)
TDK C3216X5ROJ106M
4.7μF, 10V X5R ceramic capacitors (1206)
TDK C3216X5R1A475M
3A, 30V Schottky diode (M-flat)
Toshiba CMS02
200mA, 100V, dual, ultra-fast diodes (SOT23)
Fairchild MMBD4148SE
3.6μH, 1.8A inductor
Sumida CM0611BHPNP-3R6MC
loads found in source drivers of TFT LCD panels. The
high switching frequency (1.2MHz) allows the use of
low-profile inductors and ceramic capacitors to minimize
the thickness of LCD panel designs. The integrated
high-efficiency MOSFET and the IC ’s built-in digital
soft-start functions reduce the number of external com-
ponents required while controlling inrush current. The
output voltage can be set from V IN to 18V with an exter-
nal resistive voltage-divider.
The regulator controls the output voltage and the power
delivered to the output by modulating the duty cycle (D)
of the internal power MOSFET in each switching cycle.
The duty cycle of the MOSFET is approximated by:
D ≈ MAIN IN
V ? V
V MAIN
Table 2. Component Suppliers
SUPPLIER
Fairchild Semiconductor
Sumida Corp.
TDK Corp.
Toshiba American Electronic Components, Inc.
PHONE
408-822-2000
847-545-6700
847-803-6100
949-455-2000
FAX
408-822-2102
847-545-6720
847-390-4405
949-859-3963
WEBSITE
www.fairchildsemi.com
www.sumida.com
www.component.tdk.com
www.toshibaamerica.com/taec
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相关代理商/技术参数 |
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|---|---|
| MAX8798EVCMAXQU+ | 功能描述:显示开发工具 MAX8798 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 |
| MAX8798EVKIT+ | 功能描述:显示开发工具 MAX8798 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 |
| MAX8799EVKIT+ | 制造商:Maxim Integrated Products 功能描述:SINGLE-PHASE AMD CPU - Boxed Product (Development Kits) |
| MAX8799GTI+ | 制造商:Maxim Integrated Products 功能描述:MAXIM MAX8799GTI+ VOLTAGE REFERENCES - Rail/Tube 制造商:Maxim Integrated Products 功能描述:SINGLE-PHASE AMD CPU - Rail/Tube 制造商:Maxim Integrated Products 功能描述:Maxim MAX8799GTI+ Voltage References |
| MAX8799GTI+T | 制造商:Maxim Integrated Products 功能描述:SINGLE-PHASE AMD CPU - Tape and Reel |
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