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| 型号： | MAX1513ETP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/28页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR TFT-LCD PS 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： | 2.7 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 2.7 V ~ 50 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
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TFT-LCD Power-Supply Controllers
Logic Linear-Regulator Controller
The logic linear-regulator controller (REG L) is an analog
gain block with an open-drain N-channel output. It dri-
ves an external PNP pass transistor with a 680 ? base-
to-emitter resistor (Figure 1). Its guaranteed base-drive
sink current is at least 10mA. The regulator, including
transistor Q1 in Figure 1, uses a 10μF ceramic output
capacitor and is designed to deliver 500mA at 3.3V.
Other output voltages and currents are possible by scal-
ing the pass transistor, input capacitor, and output
capacitor. See the Pass-Transistor Selection and
Stability Requirements sections.
REG L is typically used to generate low-voltage logic
supplies for the timing controller and the digital sec-
tions of the TFT-LCD source/gate-drive ICs.
REG L is automatically enabled when the input voltage
is above the UVLO threshold. Each time it is enabled,
the controller goes through a soft-start routine that
ramps up its internal reference DAC in 128 steps.
Gate-Off Linear-Regulator Controller
The gate-off linear-regulator controller (REG N) is an ana-
log gain block with an open-drain P-channel output. It dri-
ves an external NPN pass transistor with a 3.6k ?
base-to-emitter resistor (Figure 1). Its guaranteed base-
drive source current is at least 2mA. The regulator,
including Q2 in Figure 1, uses a 0.47μF ceramic output
capacitor and is designed to deliver 30mA at -10V. Other
output voltages and currents are possible by scaling the
pass transistor, input capacitor, and output capacitor.
See the Pass-Transistor Selection and Stability Require-
ments sections.
REG N is typically used to provide the TFT-LCD gate dri-
vers’ gate-off voltage. A negative voltage can be pro-
REG N is enabled after the logic linear-regulator REG L
soft-start has completed. Each time it is enabled, the
control goes through a soft-start routine that ramps
down its internal reference DAC from V REF to 250mV in
about 100 steps.
Gate-On Linear-Regulator Controller
The gate-on linear-regulator controller (REG P) is an
analog gain block with an open-drain N-channel output.
It drives an external PNP pass transistor with a 6.8k ?
base-to-emitter resistor (Figure 1). Its guaranteed base-
drive sink current is at least 1mA. The regulator includ-
ing Q3 in Figure 1 uses a 0.47μF ceramic output
capacitor and is designed to deliver 20mA at 25V.
Other output voltages and currents are possible by
scaling the pass transistor, input capacitor, and output
capacitor. See the Pass-Transistor Selection and
Stability Requirement s sections.
REG P is typically used to provide the TFT-LCD gate
drivers’ gate-on voltage. Use a charge pump with as
many stages as necessary to obtain a voltage exceed-
ing the required gate-on voltage (see the Selecting the
Number of Charge-Pump Stages section). Note that the
voltage rating of the DRVP output is 28V. If the charge-
pump output voltage can exceed 28V, an external cas-
code-connected NPN transistor should be added
(Figure 6). Alternately, the linear regulator can control
an intermediate charge-pump state while regulating the
final charge-pump output (Figure 7).
REG P is enabled after the step-up regulator soft-start
has completed and the voltage on DEL exceeds 1.25V.
Each time it is enabled, the controller goes through a
soft-start routine that ramps up its internal reference DAC
in 128 steps.
duced using a charge-pump circuit as shown in Figure 1.
LX
DRVP
V MAIN
NPN CASCODE
FROM CHARGE-
PUMP OUTPUT
PNP PASS
TRANSISTOR
0.1 μ F
6.8k ?
0.1 μ F
V MAIN
13V
MAX1513
MAX1514
FBP
TRANSISTOR
V GON
MAX1513
MAX1514
DRVP
0.47 μ F
Q1
267k ?
1%
V GON
35V
0.22 μ F
FBP
10.0k ?
1%
Figure 6. Using an NPN Cascode for Charge-Pump Output
Voltages > 28V
Figure 7. Linear Regulator Controls Intermediate Charge-Pump
Stage
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相关代理商/技术参数 |
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| MAX1513EVKIT | 功能描述:电源管理IC开发工具 MAX1513/14 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 |
| MAX1514ETP | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1514ETP+T | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1514ETP-T | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1515ETG | 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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