GMT致新 G2841AQE1U 21+

　　General Description

　　The G2841/G2841A is a 1.2MHz/600kHz fixed-frequency

　　boost regulator designed for high integration, which

　　integrates a power switch, an I/O isolation switch.

　　When a short-circuit condition is detected, the isolation

　　switch opens up to disconnect the output from the input.

　　As a result, the IC protects itself and the input

　　source from any pin, except VIN, from being shorted to

　　ground. The isolation switch also disconnects the output

　　from input during shutdown to prevent any leakage

　　current. Other provisions for protection include

　　0.5A/1.3A peak-to-peak overcurrent protection, programmable

　　soft start (SS), over voltage protection

　　(OVP), thermal shutdown, and under voltage lockout

　　(UVLO).

　　The IC operates from input supplies including single Li-ion

　　battery, triple NiMH, and regulated 5V, such as USB output.

　　The output can be boosted up to 27V. The

　　G2841/G2841A can provide the supply voltages of OLED,

　　TFT-LCE bias, 12V and 24V power rails. The output of

　　G2841/G2841A can also be configured as a current

　　source to power up to seven WLEDs in flash light applications.

　　Features

　　2.5V to 6V Input Voltage Range

　　Up to 27V Output Voltage

　　0.5A Integrated Switch G2841

　　1.3A Integrated Switch G2841A

　　12V/400mA and 24V/170mA From 5V Input

　　(Typical)

　　Integrated Power Diode

　　1.2MHz/600KHz Selectable Fixed Switching

　　Frequency

　　Input-to-Output Isolation

　　Short-Circuit Protection

　　Programmable Soft Start

　　Overvoltage Protection

　　Up to 87% Efficiency

　　DFN3X3-10 Package

　　Applications

　　3.3V to 12V, 5V to 12V, and 24V Boost Converter

　　White LED Backlight for Media Form Factor

　　Display

　　OLED Power Supply

　　xDSL Applications

　　TFT-LCD Bias Supply

　　White LED Flash Light