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参数资料
| 型号： | MAX1542ETP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/20页 |
| 文件大小： | 0K |
| 描述： | IC DC-DC CONV TFT-LCD 20-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 控制器，TFT LCD |
| 输入电压： | 2.6 V ~ 5.5 V |
| 输出数： | 2 |
| 输出电压： | 2.6 V ~ 13 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
TFT LCD DC-to-DC Converter with
Operational Amplifiers
C4
C3
0.1 μ F
0.1 μ F
D4
G_ON
+22V AT 20mA
G_OFF
-7V AT 20mA
C2
0.1 μ F
D2
C5
0.1 μ F
D3
C6
0.1 μ F
C7
0.1 μ F
V IN
2.6V TO 5.5V
V MAIN
C1
10 μ F
L1
4.7 μ F
D1
R1
75k ?
C8
4.7 μ F
+8V AT 250mA
C9
4.7 μ F
IN
LX
FB
R8
100k ?
C11
220pF
COMP
MAX1542
SUP
POS1
R5
40k ?
R3
40k ?
R2
13.7k ?
POS2
R6
R4
SRC
CTL
COM
DEL
NEG1
OUT1
NEG2
OUT2
40k ?
40k ?
TO VCOM
BACKPLANE
C10
PGND
AGND
33nF
Figure 1. MAX1542 Typical Application Circuit
Delay Control Circuit
A capacitor from DEL to AGND selects the switch control
block supply startup delay. After the input voltage
exceeds V UVLO , a 5μA current source charges C DEL .
Once the capacitor voltage exceeds the turn-on thresh-
old (1.24V) COM can be connected to SRC, depending
on the state of CTL. Before startup and when IN is less
than V UVLO , DEL is internally connected to AGND to dis-
charge C DEL . Select C DEL using the following equation:
CTL controls the P-channel MOSFET, between COM
and SRC. A high at CTL turns on Q1 between SRC and
COM, and a low at CTL turns Q1 off (Figure 4).
MAX1543 Control Block Switch
The switch control input (CTL) is not activated until the
input voltage (V IN ) exceeds V UVLO (2.5V) and V DEL
exceeds the turn-on voltage (1.24V). During UVLO or
when DEL is below the turn-on threshold, COM is
pulled low to PGND through Q3 and a 1k ? resistance.
C DEL = ( DELAY TIME ) ×
5 μ A
1 . 24 V
Once activated, CTL controls the COM MOSFETs,
switching COM between SRC and DRN. A high at CTL
turns on Q1 and disables Q2. A low at CTL turns on Q2
and turns off Q1 (Figure 4).
MAX1542 Control Block Switch
The switch control input (CTL) is not activated until
V DEL exceeds the turn-on voltage (1.24V) and the input
voltage (V IN ) exceeds V UVLO (2.5V). Once activated,
Undervoltage Lockout (UVLO)
The UVLO comparator of the MAX1542/MAX1543 com-
pares the input voltage at IN with the UVLO threshold
12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1543ETP | 功能描述:LCD 驱动器 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 |
| MAX1543ETP+ | 功能描述:LCD 驱动器 TFT LCD DC/DC Conv w/Op Amps 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 |
| MAX1543ETP+T | 功能描述:LCD 驱动器 TFT LCD DC/DC Conv w/Op Amps 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 |
| MAX1543ETP-T | 功能描述:LCD 驱动器 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 |
| MAX1543EVKIT | 功能描述:显示开发工具 MAX1542/3 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 |
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