参数资料
型号: MAX8795AGCJ+T
厂商: Maxim Integrated Products
文件页数: 15/31页
文件大小: 0K
描述: IC CONV DC-DC TFT-LCD 32LQFP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,000
应用: 转换器,TFT,LCD
输入电压: 2.5 V ~ 6 V
输出数: 8
输出电压: 2.5 V ~ 18 V
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 32-LQFP
供应商设备封装: 32-LQFP(7x7)
包装: 带卷 (TR)
TFT-LCD DC-DC Converter with
Operational Amplifiers
Typical Operating Circuit
The MAX8795A typical operating circuit (Figure 1) is a
complete power-supply system for TFT LCDs. The circuit
generates a +14V source-driver supply and +25V and
L1
LX
-10V gate-driver supplies. The input voltage range for the
IC is from +2.5V to +5.5V. The listed load currents in
Figure 1 are available from a +4.5V to +5.5V supply.
Table 1 lists some recommended components, and Table
2 lists the contact information of component suppliers.
V IN
3.0 μ H
D1
V MAIN
4.5V TO 5.5V
C1
22 μ F
R10
10 ?
IN
LX
FB
R1
137k ?
1%
LX
C3
0.1 μ F
C2
22 μ F
14V/500mA
C13
0.1 μ F
180k ?
R2
13.3k ?
1%
C4
0.1 μ F
D2
LX
C11
0.1 μ F
C12
220 μ F
R9
6.8k ?
COMP
AGND
PGND
C14
68pF
D3
C10
0.1 μ F
Q2
R7
DRVN
MAX8795A
DRVP
R3
6.8k ?
Q1
324k ?
FBP
V GOFF
-10V/50mA
C9
0.22 μ F
1%
R8
31.6k ?
FBN
R5
10.0k ?
1%
R4
191k ?
1%
C5
0.47 μ F
1%
C8
0.22 μ F
REF
SRC
COM
DRN
V GON
25V/20mA
R6
CTL
1k ?
C7
0.033 μ F
DEL
NEG1
SUP
BGND
C6
0.1 μ F
OUT1
NEG2
R19
100k ?
R17
100k ?
R15
100k ?
R13
100k ?
R11
100k ?
OUT2
POS1
TO VCOM
OUT3
POS2
R12
BACKPLANE
NEG4
OUT4
NEG5
OUT5
EP
POS3
POS4
POS5
R20
100k ?
R18
100k ?
R16
100k ?
R14
100k ?
100k ?
Figure 1. Typical Operating Circuit
Table 1. Component List
DESIGNATION
C1
C2
D1
D2, D3
DESCRIPTION
22μF, 6.3V X5R ceramic capacitor (1210)
TDK C3225X5R0J227M
22μF, 16V X5R ceramic capacitor (1812)
TDK C4532X5X1C226M
3A, 30V Schottky diode (M-flat)
Toshiba CMS02
200mA, 100V, dual ultra-fast diodes (SOT23)
Fairchild MMBD4148SE
DESIGNATION
L1
Q1
Q2
DESCRIPTION
3.0μH, 3A inductor
Sumida CDRH6D28-3R0
200mA, 40V pnp bipolar transistor (SOT23)
Fairchild MMBT3906
200mA, 40V npn bipolar transistor (SOT23)
Fairchild MMBT3904
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