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参数资料
| 型号： | MAX1543ETP+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/20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： | 60 |
| 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： | 管件 |
TFT LCD DC-to-DC Converter with
Operational Amplifiers
C4
G_OFF
C3
0.1 μ F
0.1 μ F
D4
G_ON
+22V AT 20mA
-7V AT 20mA
V IN
C2
0.1 μ F
D2
C5
0.1 μ F
D3
C6
0.1 μ F
C7
0.1 μ F
2.6V TO 5.5V
V MAIN
C1
L1
4.7 μ F
D1
+8V AT 250mA
10 μ F
IN
FREQ
LX
FB
R1
75k ?
C8
4.7 μ F
C9
4.7 μ F
C11
220pF
R8
100k ?
COMP
MAX1543
SUP
R5
40k ?
R3
40k ?
R2
13.7k ?
POS1
POS2
CTL
SRC
COM
DRN
DEL
NEG1
OUT1
NEG2
OUT2
R6
40k ?
R4
40k ?
TO VCOM
BACKPLANE
C10
PGND
AGND
33nF
Figure 2. MAX1543 Typical Application Circuit
(2.5V rising, 2.35V falling, typ) to ensure that the input
voltage is high enough for reliable operation. The
150mV (typ) hysteresis prevents supply transients from
causing a restart. Once the input voltage exceeds the
UVLO threshold, startup begins. When the input volt-
age falls below the UVLO threshold, the controller turns
off the N-channel MOSFET, the switch control block
turns off Q1, and the operational amplifier outputs float.
For the MAX1543, the switch control block also turns off
Q2 and turns on Q3 when the input voltage falls below
the UVLO threshold (Figure 4).
Oscillator Frequency (FREQ)
The MAX1542 internal oscillator is preset to 1.2MHz. The
internal oscillator frequency is pin programmable for the
MAX1543. Connect FREQ to ground or leave it uncon-
nected for 640kHz operation and connect it to V IN for
1.2MHz operation. FREQ has a 5μA (typ) pulldown current.
Fault Protection
Once the soft-start routine is complete, if the output of
the main regulator is below the fault detection threshold,
the MAX1542/MAX1543 activate the fault timer. If the
fault condition continuously exists throughout the fault
timer duration, the MAX1542/MAX1543 set the fault
latch, which shuts down the device. After removing the
fault condition, cycle the input voltage (IN) below V UVLO
to clear the fault latch and reactivate the device.
Digital Soft-Start
The MAX1542/MAX1543 digital soft-start period dura-
tion is 14ms (typ). During this time, the MAX1542/
MAX1543 directly limit the peak inductor current, allow-
ing from zero up to the full current-limit value in eight
equal current steps (I LIM /8). The maximum load current
is available after output voltage reaches the full regula-
tion threshold (which terminates soft-start), or after the
soft-start timer expires.
______________________________________________________________________________________
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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 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 |
| MAX1544ETL | 功能描述:电压模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
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