Datasheet > SGM3838

SGM3838

更新时间： 2024-11-19 11:08:19

品牌	Logo	应用领域
圣邦微 - SGMICRO		/
页数	文件大小	规格书
18页	983K
描述
Triple-Output 700mA AMOLED Display Power Supply

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SGM3838 数据手册

SGM3838

Triple-Output 700mA

AMOLED Display Power Supply

● Synchronous Inverting Buck-Boost Converter

(ELVSS)

GENERAL DESCRIPTION

The SGM3838 is designed for powering AMOLED

displays which require V_ELVDD,V_ELVSSand V_AVDD.The

device integrates two Boost converters, VO1 for V_ELVDD

and VO3 for V_AVDD, and a dual-phase 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 (SWIRE).

 -6.0V to -0.8V Output Voltage with 100mV Steps

 -3.0V Default Output Voltage

 1% Accuracy at -3V

 700mA Output Current Capability

● Synchronous Boost Converter (AVDD)

 5.5V to 7.9V Output Voltage with 100mV Steps

 7.3V Default Output Voltage

 0.9% Accuracy at 7.3V

The SGM3838 is available in a Green WLCSP-2.5×2.5-

36B package.

 150mA Output Current Capability

● V_INand V_OUTBi-Directional Isolation

● Short Circuit Protection (SCP)

● Overload Protection

FEATURES

● 2.5V to 4.8V Input Supply Voltage Range

● Synchronous Boost Converter (ELVDD)

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

 4.6V Default Output Voltage

● Thermal Shutdown

● V_ELVSSStart-Up Delay: 5.6ms

● Short Circuit and OLP Detection Time: 0.71ms

● Available in a Green WLCSP-2.5×2.5-36B Package

 0.7% Accuracy at 4.6V

 700mA Output Current Capability

 Output Voltage Sensing Pin for Path Loss

Compensation (FBS)

APPLICATIONS

Smartphones & Tablets

Active Matrix OLED Displays

TYPICAL APPLICATION

A3, B3

V_ELVDD

4.6V ~ 5.0V

VO1

FBS

2.2μH

Boost

VO1

_IN= 2.5V to 4.8V

A2, B2

A5, A6

F5, F6

SW1

22μF×2

22μF

10μF

PVIN2A

PVIN2B

10μF

C5, C6

V_ELVSS

-0.8V ~ -6.0V

VO2A

VO2B

Inverter

VO2

D5, D6, E4

2.2μH

10μF

B5, B6

E5, E6

22μF

SW2A

SW2B

SGM3838

10μH

Boost

VO3

V_AVDD

5.5V ~ 7.9V

SW3

VO3

SHT

10μF×2

10μF

AVIN

SWIRE

nFD

Internal

Analog

/Digital

Block

SHT

A1, A4, B1, F1, F4

D2, E2, F2

SWIRE

nFD

PGNDx

AGND

DGND

B4, C3, C4

VO3_EN

Figure 1. Typical Application Circuit

SG Micro Corp

www.sg-micro.com

JULY 2022 – REV. A. 2

12 3 4 5 6 7...18

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