SM41TA数据手册SiliconMitus中文资料规格书

描述 Description

The SM41TA consists of four internal-switch regulators (a boost converter, a buck converter, a buck-boost converter and a synchronous buck converter), two linear regulator controllers (positive / negative), dual analog switches, three high-speed operational amplifiers and a high-voltage level shifting scan driver.
The main boost converter and the synchronous buck converter provide the regulated supply voltage for the panel source driver ICs. The buck converter provides the digital logic voltage for the system. The buck-boost converter provides a negative voltage for the negative scan-driver supply that can vary according to the temperature sensed by an external NTC thermistor. All of these converters feature high-efficiency and a fixed frequency operation. The high switching frequency of these converters makes it possible to use ultra-small inductors and ceramic capacitors. The positive linear regulator controller with a charge pump doubler provides the regulated voltage for the positive scan-driver supply that can vary according to the temperature sensed by an external NTC thermistor. The serial-in shift register supply is derived linearly between the buck-boost converter’s output and ground by the negative linear regulator controller.The device includes dual analog switches to block or pass the I2C bus signals between TCON and EEPROM. Three high-speed op-amps are designed to drive the LCD backplane (VCOM) with the capability of high current and wide bandwidth. The high-voltage level-shifting scan drivers are fitted for capacitive loads and work well with panels that contain row drivers on the panel glass. In order to reduce the power loss, the complementary outputs are designed to allow charge sharing during state changes.

特性 Features

• 8.7 V to 14.5 V Input Supply Voltage Range
• 750 kHz Switching Frequency
• High-Efficiency Step-up Regulator
• Voltage Mode Control
• Built-in 20 V, 3.3 A, 0.15 Ω MOSFET
• High-Voltage Step-down Regulator for Logic
• Peak-Current Mode Control
• Built-in 20 V, 1.5 A, 0.26 Ω MOSFET
• Buck-boost Regulator
• Temperature-Compensated Output
• Peak-Current Mode Control
• Built-in 60 V, 1.2 A, 1 Ω MOSFET
• Synchronous Step-down Regulator
• Voltage Mode Control
• Built-in 20 V, 1.0 A, 0.5 Ω MOSFET
• Positive / Negative Linear Regulator Controller
• Uses External PNP / NPN Transistor
• Temperature-Compensated Output (positive only)
• Low Voltage Dual SPST Analog Switches
• High-Speed OP-Amp
• 15 MHz, -3 dB Bandwidth
• 35 V / s Slew Rate
• 100 mA Output Current
• Dual High-Voltage Scan Driver
• -25 V to 35 V Output Rails
• Output Charge Sharing
• Protections
• Thermal Shutdown
• Boost Converter True Shutdown by External pMOS
• Over-Load or Short Circuit / Overvoltage Protection

应用 Application

TVs