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Diodes Incorporated AP3008KTR-E1
- Part No.:
- AP3008KTR-E1
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP3008KTR-E1.pdf
- Description:
- IC LED DRIVER RGLTR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,365
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Product details
Overview
AP3008KTR-E1 from BCD Semiconductor is a constant-current white LED driver IC implementing a 1.2MHz PWM boost regulator for driving 2–3 series white LEDs from a 2.7V–12V input supply. It features 95mV feedback reference, built-in OVP (29V threshold), UVLO, and shutdown current <1µA. Used in compact portable displays requiring uniform LED brightness without ballast resistors.
For engineers reviewing the AP3008KTR-E1 datasheet, AP3008KTR-E1 pinout, AP3008KTR-E1 application, or AP3008KTR-E1 equivalent, key selection criteria include its 1.2MHz switching frequency, 95mV FB reference for low-loss current sensing, SOT-23-5 footprint, OVP protection at SW pin, and efficiency up to 84% at 10–20mA LED current.
Technical Context
The AP3008KTR-E1 integrates a fixed-frequency 1.2MHz PWM controller with internal power switch, ramp generator, and comparator referenced to a precise 95mV FB voltage. Its OVP circuit continuously monitors SW node voltage and forces shutdown if >29V, preventing damage during open-LED fault conditions.
It employs under-voltage lockout (UVLO) to disable operation below ~2.5V input and supports logic-level shutdown control (1.5V high/0.4V low thresholds). The 95mV FB reference minimizes I²R loss in the external current-sense resistor, directly enabling higher efficiency in low-voltage LED strings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.2 MHz ±20% - Enables use of small 22µH inductor and 0.22µF output capacitor, reducing PCB area. |
| Feedback Reference Voltage | 95 mV (±9 mV) - Sets LED current via external resistor; low value reduces power loss and thermal drift. |
| OVP Threshold | 29 V - Protects against open-circuit LED string failure by disabling SW output above this voltage. |
| Efficiency | Up to 84% at 10–20 mA LED current - Achieved via low RDS(on) switch and optimized gate drive. |
| Shutdown Current | <1 µA - Ensures near-zero battery drain in handheld devices during display-off states. |
| Input Voltage Range | 2.5 V to 12 V - Supports single-cell Li-ion (3.0–4.2V), dual-cell alkaline (2.7–3.6V), and regulated 3.3V/5V rails. |
| Max Duty Cycle | 90% - Allows sufficient headroom to boost from 2.7V input to ≥9V for 3× white LEDs (3.35V each). |
Pinout & Package
AP3008KTR-E1 is housed in a RoHS-compliant SOT-23-5 package (2.82 × 2.65 × 1.3 mm), optimized for space-constrained portable applications. Thermal resistance θJA is 265°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SW | Switch Node | Connects to inductor and Schottky diode anode; voltage swings up to 29V; monitored for OVP. |
| 2 - GND | Power Ground | Reference for all internal circuits; must be low-impedance connection to minimize noise and offset. |
| 3 - FB | Current-Sense Feedback | Monitors voltage across external current-set resistor; 95mV reference sets LED current precisely. |
| 4 - SHDN | Logic-Controlled Enable | Active-high enable: ≥1.5V enables; ≤0.4V disables; bias current ≤50 µA minimizes control-line loading. |
| 5 - VIN | Input Supply | Accepts 2.5–12V; requires local 1µF ceramic bypass capacitor close to pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Inherently uniform LED current | Constant-current regulation via 95mV FB reference ensures matched brightness across series-connected LEDs without discrete ballast resistors. |
| High-frequency PWM operation | 1.2MHz fixed-frequency switching allows miniaturized magnetics (22µH) and ceramic capacitors (0.22µF), cutting solution size by >40% vs. 300kHz designs. |
| Built-in OVP protection | SW-pin monitoring triggers automatic shutdown at 29V, eliminating need for external overvoltage clamp components in open-LED fault scenarios. |
| Ultra-low shutdown current | <1µA quiescent draw extends battery life in always-on portable devices such as GPS receivers and PDAs during display sleep mode. |
Applications
| Digital Cameras | LCD Modules |
|---|---|
Use Scenario: Backlighting for 2–3-inch CMOS image sensor viewfinders and preview screens. IC Role / Device Role / Timing Role: Constant-current boost driver regulating LED string current independent of battery voltage sag. Use Value: Maintains consistent luminance across 3.0–4.2V Li-ion discharge curve while occupying <3mm² PCB area. | Use Scenario: Edge-lit backlight for monochrome or color STN/TFT LCD panels in industrial HMIs and medical displays. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter generating stable LED current from 3.3V or 5V system rail. Use Value: Delivers 84% efficiency at 15mA, reducing thermal load on thin-profile enclosures and enabling fanless design. |
| Cellular Phones | GPS Receivers |
Use Scenario: Keypad and status LED illumination in legacy 2G/3G handsets with single-cell battery supply. IC Role / Device Role / Timing Role: Low-quiescent-current LED driver with logic-controlled shutdown synchronized to UI state transitions. Use Value: Shutdown current <1µA prevents measurable battery drain during standby, extending idle time beyond 72 hours. | Use Scenario: Status indicator and map-backlight in handheld GPS navigation units powered by AA/AAA batteries. IC Role / Device Role / Timing Role: Input-voltage-robust LED driver operating down to 2.5V to sustain visibility through full alkaline discharge. Use Value: UVLO ensures clean turn-off below 2.5V, avoiding erratic flicker or brown-out behavior during end-of-life battery conditions. |
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-G1 | Same die, different tape-and-reel packaging (G1 = non-RoHS); identical electrical specs and pinout. | No functional difference; only compliance and traceability distinction for legacy manufacturing lines. | Select when RoHS exemption applies or for backward compatibility with pre-2010 BOMs. |
| RT9397BZSP | Higher OVP threshold (32V), 1.3MHz switching, 100mV FB reference; requires larger output cap (1µF). | Better suited for 4-LED strings or higher-output-voltage designs; less optimal for ultra-low-power shutdown. | Choose when driving >3 LEDs or needing tighter OVP margin; avoid if minimizing capacitor count is critical. |
Compared with AP3008KTR-G1, the E1 variant guarantees RoHS compliance and modern traceability; versus RT9397BZSP, AP3008KTR-E1 offers lower FB voltage for reduced sense-resistor loss and smaller output capacitance-key for space- and efficiency-sensitive portable designs.
Availability
AP3008KTR-E1 is available at Aetrix Electronics and suitable for digital cameras, LCD modules, and GPS receivers requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.
Supply support for AP3008KTR-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 and power IC designer specializing in high-efficiency power management solutions for portable and consumer electronics.
The AP3008 belongs to BCD's White LED Driver product line, engineered specifically for compact, battery-powered displays where board space, efficiency, and fault protection are prioritized over programmability or multi-channel flexibility.
FAQ
What is the maximum number of white LEDs the AP3008KTR-E1 can drive?
The AP3008KTR-E1 is characterized to drive 2–3 standard white LEDs (VF ≈ 3.35V each) from a 2.7V–12V input. With typical forward voltage drop and 29V OVP limit, driving four LEDs (≥13.4V total) exceeds safe operating margin and risks triggering OVP shutdown during normal operation.
Does the AP3008KTR-E1 require an external Schottky diode?
Yes - the AP3008KTR-E1 integrates only the power switch (MOSFET), not the flyback diode. A Schottky diode (e.g., SS14 or equivalent) must be placed between SW and output capacitor to complete the boost path and prevent reverse current flow during switch-off periods.
How does the 95mV feedback voltage improve system efficiency?
The 95mV FB reference reduces power dissipation in the external current-sense resistor by ~75% compared to conventional 200–300mV references. For a 20mA LED current, power loss drops from ~6mW (300mV) to ~1.9mW (95mV), directly improving thermal performance and battery runtime.
Can the AP3008KTR-E1 operate without the SHDN pin connected?
No - the SHDN pin must be actively biased. Leaving it floating may cause unpredictable startup or oscillation. To enable operation, connect SHDN to VIN (≥1.5V); to disable, tie it to GND (≤0.4V) or use an open-drain logic signal with pull-down.
AP3008KTR-E1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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):
- 12V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 1.2MHz
- Dimming:
- -
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
AP3008KTR-E1 FAQ
1.How can I place an order for AP3008KTR-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3008KTR-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 AP3008KTR-E1 reliable?
The price and inventory of AP3008KTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3008KTR-E1 is usually 5 days.
3.What payment methods are accepted for AP3008KTR-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3008KTR-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3008KTR-E1?
AP3008KTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3008KTR-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 AP3008KTR-E1?
For technical support, including AP3008KTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3008KTR-E1 requirements.
6.How does Aetrix verify that AP3008KTR-E1 is sourced from the original manufacturer or authorized distributors?
All AP3008KTR-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 AP3008KTR-E1 meets industry standards.
7.What is the process for return or replacement of AP3008KTR-E1?
All AP3008KTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3008KTR-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 AP3008KTR-E1 part is unused and in its original packaging.
Return procedure for AP3008KTR-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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