参数资料
型号: MAX8784ETL+T
厂商: Maxim Integrated Products
文件页数: 12/24页
文件大小: 0K
描述: IC REG STP UP W/AMP 40-TQFN
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
电源电压: 4 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 40-WFQFN 裸露焊盘
供应商设备封装: 40-TQFN-EP(5x5)
包装: 带卷 (TR)
Step-Up Regulator, Internal Charge Pumps, Switch
Control, and Operational Amplifier for TFT LCDs
VIN = 4.5V TO 5.5V
C14
10 μ F
C15
10 μ F
L1
3 μ H
D1
C12
10 μ F
C13
10 μ F
AVDD
14V, 0.75A
C1
1 μ F
VCOM
V CC
POS1
NEG1
OUT1
LX
PGND
FB
R11
204k ?
R1
AVDD
VCOM
POS2
NEG2
OUT2
COMP
R9
100k ?
C11
330pF
R10
20k ?
10k ?
POS3
R8
82k ?
R2
10k ?
VCOM
OUT3
BGND
MAX8784
RSET
GDEL
ADEL
C9
C10
0.01 μ F
HVS
REF
0.1 μ F
R3
C2
0.22 μ F
CTL
TCON
20k ?
AGND
FBN
SHDN
GON
VIN
VGON
28V, 20mA
DRN
VGOFF
-9V, 20mA
C3
10 μ F
R4
187k ?
D2
C4
1 μ F
DRVN
PGND
POUT
FBP
R6
428k ?
C8
1 μ F
R7
1k ?
AVDD
SUP
C1N
C1P C2N
C2P
R5
20k ?
C5
AVDD
0.1 μ F
C6
0.1 μ F
C7
0.1 μ F
BGND
Figure 1. Typical Operating Circuit
Typical Operating Circuit
Table 1. Component List
The typical operating circuit (Figure 1) of the MAX8784
is a power-supply system for TFT-LCD panels in moni-
tors and TVs. The circuit generates a +14V source-dri-
ver supply, a +28V positive gate-driver supply, and a
-9V negative gate-driver supply from a 5V ±10% input
supply. Table 1 lists the selected components and
Table 2 lists the contact information of the component
suppliers.
Detailed Description
The MAX8784 is a multiple-output power supply
designed primarily for TFT-LCD panels used in monitors
C1
C14, C15
C12, C13
D1
D2
L1
1μF ±10%, 6.3V X5R ceramic capacitor (0402)
TDK C1005X5R0J105K
10μF ±20%, 6.3V X5R ceramic capacitors (0603)
TDK C1608X5R0J106M
10μF ±20%, 16V X5R ceramic capacitors (1206)
TDK C3216X5R1C106M
3A, 30V Schottky diode (M-flat)
Toshiba CMS02 (top mark S2)
220mA, 100V dual diode (SOT23)
Fairchild MMBD4148SE (top mark D4)
3.0μH, 3A DC inductor
Sumida CDRH6D28-3R0
12
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