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参数资料
| 型号： | MAX17010ETL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/17页 |
| 文件大小： | 0K |
| 描述： | IC LCD DISPLAY BIAS 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 监视器，笔记本电脑显示器 |
| 电流 - 电源： | 50µA |
| 电源电压： | 1.8 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) |
Internal-Switch Boost Regulator with Integrated
High-Voltage Level Shifter and Op Amp
D ≈ MAIN IN
The regulator controls the output voltage, and the power
delivered to the output, by modulating the duty cycle (D)
of the internal power MOSFET in each switching cycle.
The duty cycle of the MOSFET is approximated by:
V ? V
V MAIN
Figure 3 shows the block diagram of the step-up regu-
lator. An error amplifier compares the signal at FB to
1.235V and changes the COMP output. The voltage at
COMP determines the current trip point each time the
internal MOSFET turns on. As the load varies, the error
amplifier sources or sinks current to the COMP output
accordingly, to produce the inductor peak current ne-
cessary to service the load. To maintain stability at high
duty cycles, a slope-compensation signal is summed
with the current-sense signal.
On the rising edge of the internal clock, the controller
sets a flip-flop, turning on the n-channel MOSFET, and
applying the input voltage across the inductor. The cur-
rent through the inductor ramps up linearly, storing
energy in its magnetic field. Once the sum of the cur-
rent-feedback signal and the slope compensation
CLOCK
exceed the COMP voltage, the controller resets the flip-
flop and turns off the MOSFET. Since the inductor cur-
rent is continuous, a transverse potential develops
across the inductor that turns on the diode (D1). The
voltage across the inductor then becomes the diffe-
rence between the output voltage and the input volt-
age. This discharge condition forces the current
through the inductor to ramp back down, transferring
the energy stored in the magnetic field to the output
capacitor and the load. The MOSFET remains off for the
rest of the clock cycle.
Undervoltage Lockout (UVLO)
The undervoltage lockout (UVLO) circuit compares the
input voltage at IN with the UVLO threshold (1.3V rising
and 1.2V falling) to ensure that the input voltage is high
enough for reliable operation. The 100mV (typ) hysteresis
prevents supply transients from causing a restart. Once
the input voltage exceeds the UVLO rising threshold,
startup begins. When the input voltage falls below the
UVLO falling threshold, the controller turns off the main
step-up regulator and the linear regulator outputs, dis-
ables the switch-control block, and the op amp outputs
are high impedance.
LX
LOGIC AND
DRIVER
PGND
CURRENT-LIMIT
COMPARATOR
+
SLOPE COMP
PWM
-
SOFT-
START
I LIMIT
1.2MHz
OSCILLATOR
COMPARATOR
+
-
CURRENT
SENSE
-
TO FAULT LOGIC
FAULT
+
1.0V
ERROR AMP
+
FB
COMPARATOR
-
1.235V
COMP
Figure 3. Step-Up Regulator Block Diagram
12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX17010EVKIT+ | 功能描述:电源管理IC开发工具 MAX17010 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 |
| MAX17014AETM+ | 功能描述:显示驱动器和控制器 Power Supply for LCD TVs RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX17014AETM+T | 功能描述:显示驱动器和控制器 Power Supply for LCD TVs RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX17014ETM+ | 功能描述:其他电源管理 Power Supply for LCD TVs RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| MAX17014ETM+T | 功能描述:显示驱动器和控制器 Power Supply for LCD TVs RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
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