SGM3820
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Dual-Output 3500mA AMOLED Display Power Supply
The SGM3820 is designed for powering LTPO (Low Temperature Polycrystalline Oxide) and Tandem AMOLED displays which require VELVDD and VELVSS.
The device integrates one configurable Buck or Boost converter VO1 for VELVDD, and one triple-phase inverting Buck-Boost converter VO2 for VELVSS. Output voltages of all converters can be programmed in digital steps through the selectable I2C interface or SWIRE interface.
The SGM3820 is available in a Green TQFN-4×4-32L package.
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FEATURES
- Configurable Buck or Boost Mode VO1 (ELVDD)
- Independent Power Supply for VO1 and VO2 (ELVSS)
- VO1 – Buck Mode
- 5.5V to 21V Input Supply Voltage Range
- 2.0V to 5.5V Output Voltage with 100mV Steps
- 4.6V Default Output Voltage
- 0.7% Accuracy
- 3500mA Output Current Capability @ VIN = 11V, VVO2 = -4V (VIN - VVO1 ≥ 500mV)
- VO1 – Boost Mode
- 2.5V to 4.8V Input Supply Voltage Range
- 4.6V to 5.5V Output Voltage with 100mV Steps (Boost Mode Only)
- 4.6V Default Output Voltage
- 1% Accuracy
- 2300mA Output Current Capability @ VIN = 3.8V, VVO2 = -4V (VVO1 - VIN ≥ 100mV)
- Synchronous Inverting Buck-Boost Converter VO2 (ELVSS)
- 2.5V to 21V Input Supply Voltage Range
- -6V to -0.8V Output Voltage with 50mV Steps
- -16V to -6V Output Voltage with 100mV Steps
- -4.0V Default Output Voltage
- 1% Accuracy
- ELVSS Phase A Output Current Capability
- 900mA at -8.9V Output & 5.5V Input
- 350mA at -8.9V Output & 2.5V Input
- ELVSS Phase B/C Current Sense Detection Range from 60mV to 200mV
- PVIN2 and VO2 Bi-Directional Isolation
- I2C and SWIRE 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-Voltage Protection (OVP)
- Over-Temperature Protection (OTP)
- Overload Protection (OLP)
- Start-Up Short Detection (SSD)
- VELVSS Start-Up Delay: 6ms
- SCP and OLP Detection Time: 2ms
- Available in a Green TQFN-4×4-32L Package
APPLICATIONS
Smartphones & Tablets
Notebook & Personal Computers
Folding-Screen Phones
LTPS AMOLED Displays
LTPO AMOLED Displays
