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| 型号： | MAX17014ETM+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 17/33页 |
| 文件大小： | 0K |
| 描述： | IC PWR SUPPLY MULT-OUTPUT 48TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | LCD 电视机/监控器 |
| 电流 - 电源： | 8mA |
| 电源电压： | 8 V ~ 16.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-WFQFN 裸露焊盘 |
| 供应商设备封装： | 48-TQFN-EP（7x7） |
| 包装： | 带卷 (TR) |
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Low-Cost Multiple-Output
Power Supply for LCD TVs
Typical Operating Circuit
The typical operating circuit (Figure 1) of the
MAX17014 is a complete power-supply system for TFT
LCD panels in monitors and TVs. The circuit generates
a +3.3V logic supply, a +16V source driver supply, a
+34.5V positive gate driver supply, and a -6V negative
gate driver supply from a 12V ±10% input supply.
Table 1 lists some selected components and Table 2
lists the contact information for component suppliers.
Table 1. Component List
Detailed Description
The MAX17014 is a multiple-output power supply
designed primarily for TFT LCD panels used in moni-
tors and TVs. It contains a step-down switching regula-
tor to generate the logic supply rail, a step-up switching
regulator to generate the source driver supply, and two
charge-pump regulators to generate the gate driver
supplies. Each regulator features adjustable output
voltage, digital soft-start, and timer-delayed fault pro-
tection. Both the step-down and step-up regulators use
a fixed-frequency current-mode control architecture.
The two switching regulators are 180° out-of-phase to
DESIGNATION
C1, C2, C3
C5
C15, C16, C24
D1, D2
D3, D4, D5
L1
L2
DESCRIPTION
10 μF ±20%, 16V X5R ceramic capacitors
(1206)
Taiyo Yuden EMK325BJ106MD
TDK C3225X7R1C106M
22 μF ±10%, 6.3V X5R ceramic capacitor
(1206)
Taiyo Yuden JMK316BJ226KL
Murata GRM31CR60J226M
10 μF ±20%, 25V X5R ceramic capacitors
(1210)
TDK C3225X5R1E106M
3A, 30V Schottky diodes (M-Flat)
Toshiba CMS02 (TE12L,Q)
Central Semiconductor
200mA, 100V dual ultra-fast diodes
(SOT23)
Fairchild MMBD4148SE (top mark D4)
Central Semiconductor CMPD1001S lead
free (top mark L21)
Low-profile 4.7μH, 3.5A inductor
(2mm height)
TOKO FDV0620-4R7M
Low-profile 2.4μH, 2.6A inductor
(1.8mm height)
TOKO 1124BS-2R4M (2.4 μH)
Wurth 744052002 (2.5μH)
minimize the input ripple. The internal oscillator offers
two pin-selectable frequency options (600kHz/1.2MHz),
allowing users to optimize their designs based on the
specific application requirements. The MAX17014
includes two high-performance operational amplifiers
designed to drive the LCD backplane (VCOM). The
amplifiers feature high output current (±150mA), fast
slew rate (100V/μs), wide bandwidth (20MHz), and rail-
to-rail inputs and outputs. In addition, the MAX17014
features a high-voltage switch-control block, an internal
5V linear regulator, a 1.25V reference output, well-
defined power-up and power-down sequences, and
thermal-overload protection. Figure 2 shows the
MAX17014 functional diagram.
Step-Down Regulator
The step-down regulator consists of an internal n-chan-
nel MOSFET with gate driver, a lossless current-sense
network, a current-limit comparator, and a PWM con-
troller block. The external power stage consists of a
Schottky diode rectifier, an inductor, and output capac-
itors. The output voltage is regulated by changing the
duty cycle of the n-channel MOSFET. A bootstrap cir-
cuit that uses a 0.1μF flying capacitor between LX2 and
BST provides the supply voltage for the high-side gate
driver. Although the MAX17014 also includes a 10 Ω
(typ) low-side MOSFET, this switch is used to charge
the bootstrap capacitor during startup and maintains
fixed-frequency operation at light load and cannot be
used as a synchronous rectifier. An external Schottky
diode (D2 in Figure 1) is always required.
Table 2. Component Suppliers
SUPPLIER
Fairchild Semiconductor
Sumida
TDK
Toshiba
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.toshiba.com/taec
______________________________________________________________________________________
17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX17014EVKIT+ | 功能描述:电源管理IC开发工具 MAX17014 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX17015AETP+ | 功能描述:电池管理 1.2MHz High-Perf Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX17015AETP+T | 功能描述:电池管理 1.2MHz High-Perf Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX17015BETP+ | 功能描述:电池管理 1.2MHz High-Perf Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX17015BETP+T | 功能描述:电池管理 1.2MHz High-Perf Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
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