SGM3843中文資料圣邦股份數(shù)據(jù)手冊PDF規(guī)格書

GENERAL DESCRIPTION

The SGM3843 is a PMIC (Power Management IC)

designed for powering AMOLED (Active Matrix Organic

LED) displays which require VELVDD, VELVSS, VAVDD,

VDVDD and VVGL.

The device integrates two Boost converters VO1 for

VELVDD and VO3 for VAVDD, one dual-phase inverting

Buck-Boost converter VO2 for VELVSS, one single-phase

inverting Buck-Boost converter VO5 for VVGL, and one

Buck converter VO4 for VDVDD. It also integrates one

negative low dropout linear regulator (LDO) VO5_LDO

for VVGL_LDO.

The DVDD, VGL and VGL_LDO are used for powering

the DDIC (Display-Driver IC).

All output voltages of these converters can be

programmed in digital steps through the I 2 C interface.

The SGM3843 is available in a Green WLCSP-3.3×

3.3-64B package.

FEATURES

● 2.9V to 5.0V Input Supply Voltage Range

● Synchronous Boost Converter VO1 (ELVDD)

? 4.6V to 5.0V Output Voltage with 100mV Steps

? 4.6V Default Output Voltage

? 0.65% Accuracy at 4.6V

? 1200mA Output Current Capability

● Synchronous Inverting Buck-Boost Converter

VO2 (ELVSS)

? -8.0V to -1.0V Output Voltage with 50mV Steps

? -4.0V Default Output Voltage

? 1% Accuracy at -4.0V

? 1200mA Output Current Capability

● Synchronous Boost Converter VO3 (AVDD)

? 5.7V to 8.0V Output Voltage with 50mV Steps

? 7.6V Default Output Voltage

? 0.66% Accuracy at 7.6V

? 200mA Output Current Capability

● Synchronous Buck Converter VO4 (DVDD)

? 0.7V to 2.1V Output Voltage with 25mV Steps

? 1.05V Default Output Voltage

? 0.6% Initial Accuracy at 1.05V

? 400mA Output Current Capability

● Synchronous Inverting Buck-Boost Converter

VO5 (VGL)

? -4.0V to -12.5V Output Voltage with 100mV Steps

? -7V Default Output Voltage

? 0.8% Accuracy at -7V

? 30mA Output Current Capability

● Low Dropout Linear Regulator VO5_LDO

(VGL_LDO)

? Fixed 300mV Dropout Voltage

? 30mA Output Current Capability

● Excellent Line Transient Regulation

● High Performance Load Regulation

● VIN and VOUT Bi-Directional Isolation

● I

2

C Interface

● Under-Voltage Lockout (UVLO)

● All Channels Soft-Start

● All Channels Fast Discharge Function (FD)

● All Channels Short Circuit Protection (SCP)

● All Channels Over-Current Protection (OCP)

● Over-Temperature Protection (OTP)

● Overload Protection (OLP)

● Start-Up Short Detection (SSD)

● VELVSS Start-Up Delay: 5.7ms

● Short Circuit and OLP Detection Time: 1ms

● Available in a Green WLCSP-3.3×3.3-64B Package

APPLICATIONS

Smartphones & Tablets

Active Matrix OLED Displays