Diodes Incorporated

Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details.

Back to LED Drivers for Backlights and AMOLED PMICs


White LED Step-Up Converter for Small Panel

Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.


The DIODES™ AP3031 is an inductor-based DC/DC boost converter designed to drive LED arrays. 1.4A switching current allows AP3031 to be used in different 7' to 10' LCD panel backlights (3*13 LED arrays typically).

A constant frequency 1MHz PWM control scheme is employed in this IC, which means tiny external components can be used. Specifically, 1mm tall 4.7µH inductor and 0.47µF output capacitor for the typical application is sufficient.

The over output voltage protection is equipped in AP3031, which protects the IC under open load condition. The AP3031 includes UVLO, soft-start, current limit and OTSD to protect the circuit.

The AP3031 is available in standard SOT-23-6 package.


  • Up to 92% Efficiency (VIN = 9V, IOUT = 260mA)
  • Up to 84% Efficiency (VIN = 5V, IOUT = 260mA)
  • Fast 1MHz Switching Frequency
  • Wide Input Voltage Range: 2.7V to 16V
  • Low 200mV Feedback Voltage
  • Output Overvoltage Protection
  • Cycle by Cycle Current Limit: 1.4A
  • Built-in Soft-Start
  • Built-in Standby Mode to Achieve High Frequency PWM Dimming
  • Built-in Thermal Shutdown Function
  • Undervoltage Lockout
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/


  • 7' to 10' LCD panels
  • Digital photo frames
  • GPS receivers
  • EPC
  • PDVD

Product Specifications

Product Parameters

AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Function Boost LED Driver
MinimumInput Voltage (V) 2.7 V
MaximumInput Voltage (V) 16 V
Maximum Output Voltage (V) 37 V
Number of Regulated Output Channels 1
Maximum Output Current per Channel 260 mA
Typical Overcurrent Protection Current 1400 mA
Switching Frequency (MHz) 1 MHz
Efficiency (%) 92 %
Quiescent Current (µA) 4 mA
Standby Quiescent Current (µA) 50 µA
Dimming PWM and External DC
Soft Start Yes
VFB 200 V
OperatingTemperatureRange  (°C) -40 to 85 °C

Related Content


Technical Documents

Recommended Soldering Techniques


Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2654 2024-02-15 2024-04-28 Device End of Life (EOL)
PCN-2610 2023-03-30 2023-09-30 Device End of Life (EOL)
PCN-2548 2021-10-08 2022-01-08 Additional Wafer Source (JKFAB), New Bill of Materials (BOM) with PdCu Bond Wire, and Assembly/Test (A/T) Site (CAT)
PCN-2366 2018-09-19 2018-12-19 Qualification of Additional Bill of Materials (BOM), Fab Source, A/T Site and Top Marking Change on Select Product