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White LED Step-Up Converter for Small Panel

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


  • 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 Over Voltage 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
  • Under Voltage Lockout


  • 7' to 10' LCD Panels
  • Digital Photo Frame
  • GPS Receiver
  • 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 Over-Current Protection Current 1400 mA
Switching Frequency (kHz) 1 MHz
Efficiency (%) 92 %
Quiescent Current (mA) 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

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Technical Documents

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Orderable Part Number Buy from Distributor / Contact Sales Request Samples


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Mouser Electronics Inc. 1377 6/25/2022 South America, North America, Asia, Europe, Middle East Buy Now
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Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Avnet EU 15000 6/25/2022 Germany Buy Now
Arrow Electronics Central EU 180000 6/25/2022 Europe Buy Now
Digi-Key Electronics 19221 6/25/2022 Europe, Asia, North America Buy Now
Farnell, An Avnet Company 58 6/25/2022 England Buy Now
Mouser Electronics Inc. 763 6/25/2022 South America, North America, Asia, Europe, Middle East Buy Now
RS Components - Spain 220 6/25/2022 Spain Contact Sales
RS Components - Spain 5000 6/25/2022 Spain Contact Sales
RS Components - UK 220 6/25/2022 England Buy Now
RS Components - UK 5000 6/25/2022 England Buy Now
Rutronik GmbH 12000 6/24/2022 Germany Buy Now
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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-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
PCN-2246 2017-06-28 2017-09-28 Additional Qualified Assembly/Test (A/T) Site – Chengdu A/T (CAT) with Part Marking Update
PCN-2262 2017-03-16 2017-06-30 Device End of Life (EOL)