Datasheet > SGM3851A

SGM3851A

更新时间： 2024-11-19 11:08:15

品牌	Logo	应用领域
圣邦微 - SGMICRO		/
页数	文件大小	规格书
13页	1269K
描述
Triple-Output AMOLED Display Power Supply

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SGM3851A 数据手册

SGM3851A

Triple-Output

AMOLED Display Power Supply

● Synchronous Inverting Buck-Boost Converter

(ELVSS)

GENERAL DESCRIPTION

The SGM3851A is designed for powering AMOLED

displays which require V_AVDD, V_ELVDDand V_ELVSS. The

device integrates two boost converters, VO1 for V_ELVDD

and VO3 for V_AVDD, and an inverting buck-boost

converter VO2 for V_ELVSS. Output voltages of all the

three converters can be programmed in digital steps

through the digital interface control pin (CTRL).

 -5.4V to -1.4V Output Voltage with 100mV Steps

 -2.5V Default Output Voltage

 1.6% Accuracy at -2.5V (±40mV)

 400mA Output Current Capability

● Synchronous Boost Converter (AVDD)

 5.8V to 7.9V Output Voltage with 300mV Steps

 6.1V Default Output Voltage

 1.2% Accuracy

The SGM3851A is available in a Green TQFN-3×3-16L

package. It operates over an ambient temperature

range of -40℃ to +85℃.

 100mA Output Current Capability

● V_INand V_OUTBi-Directional Isolation

● Short Circuit Protection (SCP)

● Overload Protection

FEATURES

● Thermal Shutdown

● V_ELVSSStart-Up Delay: 10ms

● Short Circuit and OLP Detect Time: 1ms

● Available in a Green TQFN-3×3-16L Package

● 2.9V to 4.5V Input Voltage Range

● Synchronous Boost Converter (ELVDD)

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

 4.6V Default Output Voltage

 1.2% Accuracy

APPLICATIONS

 400mA Output Current Capability

 Output Voltage Sensing Pin for Path Loss

Compensation (FBS)

Smartphones & Tablets

Active Matrix OLED Displays

TYPICAL APPLICATION

V_ELVDD

4.6V/400mA

4.7μH

VO1

FBS

V_IN= 2.9V to 4.5V

SW1

10μF

4.7μH

10μH

V_ELVSS

-2.5V/400mA

SW2

VO2

SGM3851A

SW3

2×10μF

10μF

V_AVDD

6.1V/100mA

VO3

PVIN

AVIN

3×10μF

PGND1

PGND2

AGND

Enable Discharge

Enable V_AVDD

EN_VO3

CTRL

Enable V_ELVDD/V_ELVSS

Program Device

Figure 1. Typical Application Circuit

SG Micro Corp

DECEMBER 2019 – REV. A. 1

www.sg-micro.com

12 3 4 5 6 7...13

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