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Diodes Incorporated AP3031KTTR-G1
- Part No.:
- AP3031KTTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
AP3031KTTR-G1.pdf
- Description:
- IC LED DRVR RGLTR PWM TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,998
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Product details
Overview
AP3031KTTR-G1 from BCD Semiconductor is a white LED step-up DC/DC converter IC designed for backlight driving in compact LCD panels. It delivers up to 260mA output current with 1.4A switch current limit, operates at fixed 1MHz PWM frequency, and features 200mV feedback reference voltage - enabling precise LED current regulation in 3×13 LED arrays for 7″–10″ displays.
For engineers reviewing the AP3031KTTR-G1 datasheet, AP3031KTTR-G1 pinout, AP3031KTTR-G1 application, or AP3031KTTR-G1 equivalent, key selection considerations include its TSOT-23-6 package thermal performance (θJA = 265°C/W), OVP clamping at 17.5V, standby-mode dimming support up to 25kHz, and compatibility with low-profile 4.7μH inductors and 0.47μF output capacitors.
Technical Context
The AP3031KTTR-G1 employs constant-frequency current-mode control with internal ramp compensation, where peak switch current is regulated by the error amplifier's output against a stabilized ramp signal. Its 200mV feedback reference sets LED current via external RISET resistor, ensuring ±6% accuracy over −40°C to +85°C.
It integrates dual CTRL-pin response modes: logic-low pulses >0.7ms trigger soft-start for inrush protection, while sub-0.7ms pulses activate standby mode for high-frequency PWM dimming without audio noise. Over-voltage protection clamps output at 17.5V during open-load conditions, reducing switching frequency to minimize input droop.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1 MHz - enables use of miniature 4.7μH inductors and 0.47μF ceramic output capacitors, reducing board area and EMI filtering burden. |
| Feedback Voltage | 200 mV - precise reference for LED current setting via external RISET; supports ±6% current accuracy across temperature. |
| Switch Current Limit | 1.4 A - supports driving 39 LEDs (3×13) at 260mA total with margin for transient loads and inductor saturation. |
| Input Voltage Range | 2.7 V to 16 V - accommodates single-cell Li-ion (3.0–4.2V), dual-cell NiMH (2.4–3.0V), or 5V/12V system rails without pre-regulation. |
| OVP Threshold | 17.5 V - clamps output during LED string open-circuit failure, preventing damage to downstream components and enabling safe fault recovery. |
| CTRL Pin Response | 0.7 ms threshold - distinguishes soft-start (≥0.7ms low pulse) from standby-mode dimming (<0.7ms low pulse), enabling flicker-free 25kHz PWM control. |
| Efficiency @ 5VIN | 84% @ 260mA - minimizes thermal load in space-constrained portable devices such as GPS receivers and digital photo frames. |
Pinout & Package
AP3031KTTR-G1 is packaged in TSOT-23-6 - a thermally enhanced, lead-free, RoHS-compliant 6-pin surface-mount package with 0.95mm profile, optimized for high-power-density LED driver applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW) | Switch Node | Connects to external inductor and Schottky diode anode; carries pulsed 1.4A peak current and must be routed with low-inductance layout. |
| 2,3,6 (GND) | Ground Reference | Three dedicated ground pins reduce PCB trace inductance and improve current return path integrity for stable current-mode control. |
| 4 (FB) | Feedback Input | Senses output current via RISET resistor; 200mV reference enables accurate LED current regulation independent of forward voltage variation. |
| 5 (VIN) | Power Input | Accepts 2.7–16V supply; requires local 10μF ceramic bypass capacitor placed adjacent to pin to suppress high-frequency switching noise. |
| 7 (OV) | OVP Sense | Direct connection to output node; triggers internal clamp when voltage exceeds 17.5V, protecting LEDs and driver under open-load faults. |
| 8 (CTRL) | Enable/Dimming Control | Active-high enable; logic-low duration determines operation mode - soft-start (>0.7ms) or standby dimming (<0.7ms). |
Key Features
| Feature | Design Value |
|---|---|
| Standby-mode PWM dimming | Supports up to 25kHz dimming frequency without audible noise, enabled by sub-0.7ms CTRL pin low pulses - eliminates need for external dimming ICs. |
| Integrated OVP protection | Clamps output at 17.5V during LED string open-circuit, reducing switching frequency and input current to prevent system brownout. |
| Cycle-by-cycle current limit | 1.4A hard limit prevents inductor saturation and MOSFET overstress during startup, short-circuit, or thermal overload events. |
| Low 200mV feedback reference | Minimizes power loss in RISET resistor and improves current-setting accuracy across temperature versus higher-reference competitors. |
| Thermal shutdown | Activates at 155°C junction temperature and holds until die cools by ≥10°C, providing robust protection in sealed enclosures or high ambient conditions. |
Applications
| 7″–10″ LCD Panel Backlight | Digital Photo Frame |
|---|---|
Use Scenario: Driving 3×13 white LED arrays in portable LCD modules with 5V or 12V input rails. IC Role / Device Role / Timing Role: Primary boost controller regulating constant LED current via FB pin and RISET resistor; 1MHz switching ensures compact passive component sizing. Use Value: Delivers 260mA at >84% efficiency from 5V input, enabling thin bezel designs with minimal thermal dissipation in plastic housings. |
Use Scenario: Powering multi-segment LED backlights in battery-operated photo frames with variable image brightness. IC Role / Device Role / Timing Role: Constant-current LED driver with CTRL-pin dimming interface; standby mode enables seamless 20kHz PWM brightness control without flicker or buzz. Use Value: Eliminates need for separate dimming circuitry; 200mV FB reference ensures consistent luminance across LED batch variations and temperature drift. |
| GPS Receiver Display | Portable DVD Player (PDVD) |
Use Scenario: Illuminating small-form-factor transflective LCDs in automotive-grade GPS units operating from 9–16V vehicle supply. IC Role / Device Role / Timing Role: Wide-input (2.7–16V) boost converter with UVLO and OVP; handles cold-crank (6.5V) and load-dump (20V) transients per ISO 7637-2. Use Value: Maintains stable backlight current during engine start-up dips; 17.5V OVP prevents damage if display cable disconnects during vibration. |
Use Scenario: Supplying regulated current to edge-lit LED strings in portable DVD players powered by 3.6V Li-ion batteries. IC Role / Device Role / Timing Role: Step-up controller with soft-start and thermal shutdown; supports dynamic brightness scaling via CTRL pin during video playback. Use Value: Extends battery runtime via 84% efficiency at 5V input and reduces heat buildup in confined chassis using TSOT-23-6's 265°C/W θJA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RT9293BGJ6 | Fixed 1.2MHz switching frequency; 1.5A current limit; 200mV FB reference; no integrated OVP - requires external Zener clamp. | Lacks built-in OVP and standby-mode dimming; dimming requires external PWM generator or analog voltage injection. | Choose when board space allows external OVP and cost sensitivity outweighs dimming flexibility. |
| MT9700DF | 1.3MHz switching; 1.3A current limit; 200mV FB; includes OVP but no standby-mode dimming - only soft-start on enable. | Supports basic on/off dimming only; cannot achieve >1kHz flicker-free dimming without external circuitry. | Prefer when thermal budget permits SOIC-8 package and dimming requirements are limited to simple enable/disable control. |
Compared with RT9293BGJ6 and MT9700DF, AP3031KTTR-G1 uniquely combines integrated OVP, dual-mode CTRL pin (soft-start + standby dimming), and TSOT-23-6 thermal performance - making it optimal for compact, high-reliability portable displays requiring silent, wide-range brightness control.
Availability
AP3031KTTR-G1 is available at Aetrix Electronics and suitable for 7″–10″ LCD panel backlighting, digital photo frames, GPS receiver displays, and portable DVD players requiring stable component supply, RoHS compliance, and long-term lifecycle support.
Supply support for AP3031KTTR-G1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
BCD Semiconductor Manufacturing Limited is a Shanghai-based analog IC design and wafer fabrication company specializing in high-efficiency power management solutions for consumer and industrial applications.
The AP3031 belongs to BCD's white LED backlight driver product line, engineered specifically for space-constrained portable displays requiring high efficiency, integrated protection, and flicker-free dimming - not general-purpose DC/DC conversion.
FAQ
What is the maximum LED string voltage supported by AP3031KTTR-G1?
The AP3031KTTR-G1 features over-voltage protection triggered at 17.5V, and its absolute maximum SW pin voltage is 38V. In practice, the maximum sustainable output voltage is limited by the OVP threshold - typically clamped at 17.5V during open-load conditions. For normal operation with 3×13 white LEDs (VF ≈ 3.2V each), the output voltage is ~10V, well within safe margins.
Can AP3031KTTR-G1 drive more than 39 LEDs?
No - the AP3031KTTR-G1 is rated for up to 260mA output current and 1.4A switch current limit, optimized for 3×13 LED arrays (39 LEDs). Driving longer strings would exceed its 17.5V OVP threshold and risk triggering protection or violating recommended operating conditions. For higher-voltage strings, a different topology or controller is required.
How does the CTRL pin distinguish between soft-start and standby mode?
The CTRL pin uses a 0.7ms timing threshold: a logic-low pulse lasting ≥0.7ms resets internal soft-start circuitry, causing gradual ramp-up of output current to limit inrush; a pulse <0.7ms places the IC in standby mode, where it remains ready to switch immediately upon re-enable - enabling seamless 20–25kHz PWM dimming without startup delay or audible noise.
Is external compensation required for AP3031KTTR-G1 stability?
No - the AP3031KTTR-G1 uses internal compensation optimized for standard 4.7μH inductors and 0.47μF ceramic output capacitors. The datasheet confirms stable operation with the typical application circuit (Figure 24) without additional compensation components, simplifying layout and reducing BOM count.
AP3031KTTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 16V
- Voltage - Output:
- -
- Current - Output / Channel:
- 1.4A (Switch)
- Frequency:
- 1MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
AP3031KTTR-G1 FAQ
1.How can I place an order for AP3031KTTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3031KTTR-G1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AP3031KTTR-G1 reliable?
The price and inventory of AP3031KTTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3031KTTR-G1 is usually 5 days.
3.What payment methods are accepted for AP3031KTTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3031KTTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3031KTTR-G1?
AP3031KTTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3031KTTR-G1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AP3031KTTR-G1?
For technical support, including AP3031KTTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3031KTTR-G1 requirements.
6.How does Aetrix verify that AP3031KTTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP3031KTTR-G1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AP3031KTTR-G1 meets industry standards.
7.What is the process for return or replacement of AP3031KTTR-G1?
All AP3031KTTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3031KTTR-G1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AP3031KTTR-G1 part is unused and in its original packaging.
Return procedure for AP3031KTTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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