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Diodes Incorporated AP3009KTR-E1
- Part No.:
- AP3009KTR-E1
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- SOT-23-6
- Datasheet:
-
AP3009KTR-E1.pdf
- Description:
- IC LED DRV RGLTR ANALOG SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,303
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Product details
Overview
AP3009KTR-E1 from BCD Semiconductor is a white LED step-up DC/DC converter IC designed to drive 2–6 series-connected white LEDs in backlight applications. It integrates a Schottky diode, employs a fixed 1.2 MHz PWM switching frequency, features 200 mV feedback reference voltage, delivers up to 83% typical efficiency, and includes overvoltage protection clamping output to 30 V under open-LED fault conditions.
For engineers reviewing the AP3009KTR-E1 datasheet, AP3009KTR-E1 pinout, AP3009KTR-E1 application, or AP3009KTR-E1 equivalent, key selection criteria include its integrated Schottky diode, linear dimming via CTRL pin (1.8 V enable / ≤50 mV disable), 2.5–16 V input range, and SOT-23-6 footprint compatibility with space-constrained portable displays.
Technical Context
The AP3009KTR-E1 implements a current-mode boost topology with internal power switch and integrated Schottky diode, enabling compact LED driver designs without external rectification. Its 1.2 MHz oscillator allows use of sub-1 mm height inductors and a 0.22 µF ceramic output capacitor.
Feedback is regulated at 200 mV across an external sense resistor to set LED current; the CTRL pin provides three-state control-enable, disable, and analog dimming-while OVP circuitry actively clamps VOUT at 30 V during LED string open-circuit faults.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.2 MHz typical - enables ultra-compact LC filter design with 22 µH inductor and 0.22 µF capacitor |
| Feedback Reference Voltage | 200 mV ±12 mV - sets LED current via single external resistor; stable across –40°C to +85°C |
| Input Voltage Range | 2.5 V to 16 V - supports single-cell Li-ion (3.0–4.2 V) and multi-cell alkaline/NiMH inputs |
| Output Overvoltage Clamp | 30 V - protects downstream components during LED string open-circuit or thermal shutdown |
| CTRL Pin Thresholds | ≥1.8 V enable / ≤50 mV disable - supports direct GPIO interface and analog dimming with 0–1.8 V range |
| Typical Efficiency | 83% at 4 LEDs, VIN = 3.6 V, ILED = 20 mA - minimizes thermal load in handheld backlight systems |
| Integrated Schottky Diode | VF = 0.7 V at 150 mA - eliminates external diode, reduces BOM count and PCB area |
Pinout & Package
The AP3009KTR-E1 is housed in a RoHS-compliant SOT-23-6 package (2.82 × 2.65 × 1.45 mm, 0.95 mm typ. height), optimized for high-density portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VOUT | Boost output node | Connects to cathode of internal Schottky diode; feeds LED anode string; requires local 0.22 µF ceramic capacitor |
| 2 - GND | Power and signal ground | Common return path for switch, feedback, and control circuits; must be low-impedance copper pour |
| 3 - FB | Current-sense feedback input | Monitors voltage across external current-set resistor; regulated at 200 mV for precise LED current control |
| 4 - CTRL | Enable/dimming control input | Three-state operation: ≥1.8 V = active, ≤50 mV = shutdown, 0.05–1.8 V = linear dimming (VFB scales proportionally) |
| 5 - VIN | Main input supply | Accepts 2.5–16 V; requires local 1 µF ceramic bypass capacitor near pin; powers internal circuitry and switch |
| 6 - SW | Internal switch drain node | Connects to external boost inductor; switches at 1.2 MHz; peak current limited to 465–560 mA depending on duty cycle |
Key Features
| Feature | Design Value |
|---|---|
| Inherently uniform LED current | Series LED configuration ensures identical current through all 2–6 LEDs without balancing resistors |
| No external Schottky diode required | Integrated 0.7 V forward-drop diode reduces component count, layout area, and thermal dissipation |
| Fast 1.2 MHz switching | Enables use of miniature 22 µH inductors ≤1 mm tall and small 0.22 µF X5R/X7R output capacitors |
| Overvoltage protection (OVP) | Clamps VOUT at 30 V during open-LED fault, preventing damage to LEDs, capacitors, or PCB traces |
| Linear analog dimming | CTRL pin accepts 0–1.8 V analog voltage to scale LED current continuously without PWM artifacts |
Applications
| Cellular Phone Backlight | Digital Camera LCD Backlight |
|---|---|
|
Use Scenario: Driving 4–6 white LEDs behind a 2.4"–3.5" TFT-LCD in slim smartphone bezels. IC Role / Device Role / Timing Role: Boost controller regulating constant LED current with integrated diode and OVP. Use Value: Eliminates external diode and reduces total solution height to <1.5 mm, meeting mechanical stack-up constraints. |
Use Scenario: Powering high-brightness 3.0"–4.3" LCD panels in compact digital cameras with battery life optimization. IC Role / Device Role / Timing Role: High-efficiency (83% typ.) step-up converter with analog dimming for smooth brightness control. Use Value: 1.2 MHz operation enables fast transient response during auto-exposure LED bursts and low-noise imaging. |
| GPS Receiver Display | PDA / Handheld Computer Backlight |
|
Use Scenario: Illuminating outdoor-readable monochrome or color LCDs in automotive-grade GPS units operating from 3.3 V or 5 V rails. IC Role / Device Role / Timing Role: Wide-input (2.5–16 V), temperature-stable (–40°C to +85°C) LED driver with robust OVP. Use Value: 30 V OVP clamp prevents display failure during cold-start voltage spikes or LED disconnection in vibration-prone environments. |
Use Scenario: Backlighting QVGA or VGA resolution LCDs in legacy PDAs with limited board space and thermal budget. IC Role / Device Role / Timing Role: Compact SOT-23-6 LED driver supporting 2–6 LED strings and GPIO-compatible enable/dim control. Use Value: Single-resistor current setting and 2.6 mA quiescent supply current extend battery runtime between charges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED boost driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP3008KTR-E1 | Same family, but 600 kHz switching frequency and no integrated Schottky diode | Requires external diode; larger inductor/capacitor needed; lower efficiency (~78%) at same load | Select only if lower EMI priority outweighs size/efficiency trade-offs |
| RT9397BZSP | 1.2 MHz, integrated diode, but 250 mV FB reference and no analog dimming (PWM-only) | Lacks linear dimming capability; requires external PWM generator; tighter FB tolerance (±1%) | Prefer when PWM dimming suffices and higher FB accuracy is critical for binning consistency |
Compared with AP3008KTR-E1, the AP3009KTR-E1 saves board area and improves efficiency via integrated diode and faster switching; versus RT9397BZSP, it offers analog dimming flexibility at the cost of slightly looser FB tolerance, making it better suited for cost-sensitive portable displays requiring smooth brightness transitions.
Availability
AP3009KTR-E1 is available at Aetrix Electronics and suitable for cellular phone backlight, digital camera LCD backlight, and GPS receiver display applications requiring stable component supply, RoHS compliance, and long-term industrial availability.
Supply support for AP3009KTR-E1 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 designer specializing in power management, LED drivers, and mixed-signal solutions for consumer and industrial markets.
The AP3009 belongs to BCD's white LED backlight driver product line, engineered specifically for space-constrained portable displays requiring high integration, low profile, and reliable fault protection.
FAQ
What is the minimum input voltage required for AP3009KTR-E1 to start switching?
The AP3009KTR-E1 requires a minimum input voltage of 2.5 V to initiate switching and maintain regulation. Below this threshold, the internal oscillator and gate driver remain inactive, and the device enters undervoltage lockout. Startup is guaranteed at 2.5 V across the full temperature range (–40°C to +85°C), with typical operation beginning at 2.7 V under light load.
How does the CTRL pin enable analog dimming, and what voltage range is supported?
The CTRL pin supports true linear analog dimming: applying 0.05–1.8 V scales the FB reference voltage proportionally from ~0 mV to 200 mV, thereby reducing LED current linearly. At 0.5 V CTRL, LED current drops to ~25% of full-scale; at 1.0 V, it is ~50%. This avoids PWM-induced flicker and EMI, making it ideal for camera viewfinders and medical displays.
Can AP3009KTR-E1 drive more than six white LEDs?
No. The AP3009KTR-E1 is rated for up to six white LEDs in series, assuming typical forward voltage of 3.45 V per LED at 20 mA (total ~20.7 V). Its 30 V OVP clamp and internal switch breakdown rating limit practical output to ≤28 V. Attempting seven LEDs (≥24 V) risks violating recommended operating conditions and may trigger premature OVP activation under temperature or process variation.
Is an external compensation network required for AP3009KTR-E1 stability?
No external compensation is required. The AP3009KTR-E1 uses an internally compensated current-mode control architecture optimized for standard 22 µH inductors and 0.22 µF ceramic output capacitors. Stability is verified across all recommended operating conditions (2.5–16 V input, 2–6 LEDs, –40°C to +85°C), eliminating need for loop compensation components or layout-dependent tuning.
AP3009KTR-E1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-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):
- 2.5V
- Voltage - Supply (Max):
- 16V
- Voltage - Output:
- 38V
- Current - Output / Channel:
- 560mA (Switch)
- Frequency:
- 1.2MHz
- Dimming:
- Analog
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
AP3009KTR-E1 FAQ
1.How can I place an order for AP3009KTR-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3009KTR-E1 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 AP3009KTR-E1 reliable?
The price and inventory of AP3009KTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3009KTR-E1 is usually 5 days.
3.What payment methods are accepted for AP3009KTR-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3009KTR-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3009KTR-E1?
AP3009KTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3009KTR-E1 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 AP3009KTR-E1?
For technical support, including AP3009KTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3009KTR-E1 requirements.
6.How does Aetrix verify that AP3009KTR-E1 is sourced from the original manufacturer or authorized distributors?
All AP3009KTR-E1 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 AP3009KTR-E1 meets industry standards.
7.What is the process for return or replacement of AP3009KTR-E1?
All AP3009KTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3009KTR-E1, 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 AP3009KTR-E1 part is unused and in its original packaging.
Return procedure for AP3009KTR-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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