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Diodes Incorporated AP2502KTR-G1
- Part No.:
- AP2502KTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- SOT-23-6
- Datasheet:
-
AP2502KTR-G1.pdf
- Description:
- IC LED DRVR LIN PWM 20MA SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:119,078
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Product details
Overview
AP2502KTR-G1 from BCD Semiconductor Manufacturing Limited is a 4-channel linear constant-current LED sink driver with ±1% channel-to-channel current matching, 65mV typical dropout voltage at 20mA, and ultra-low 125µA quiescent current. It operates from 3.3–6.0V input, supports PWM dimming up to 150kHz via EN pin, and targets Li-ion-powered portable display backlight modules requiring stable, noise-free current regulation.
For engineers reviewing the AP2502KTR-G1 datasheet, AP2502KTR-G1 pinout, AP2502KTR-G1 application, or AP2502KTR-G1 equivalent, key selection criteria include per-channel 20mA sink capability, thermal shutdown protection at 150°C, SOT-23-6 package compatibility, RoHS-compliant green packaging, and absence of EMI/switching noise in linear operation.
Technical Context
The AP2502 implements four independent linear current sinks with chopper offset-canceling circuitry to achieve ±1% matching across channels under varying temperature and voltage conditions. Each channel regulates cathode-side LED current without external resistors, using internal reference and feedback control.
It features active thermal shutdown (150°C trip, 25°C hysteresis), 1µA max shutdown current when EN is low, and supports brightness control via externally applied PWM signal on the EN pin - eliminating need for analog dimming circuitry or external current-setting components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 independent linear current sinks, each configurable as standalone LED driver |
| Max Sink Current | 20mA per channel - sufficient for driving small white or RGB LEDs in portable displays |
| Current Matching | ±1% - ensures uniform brightness across multi-LED arrays without binning or trimming |
| Dropout Voltage | 65mV typ. @ 20mA - enables operation with minimal headroom, extending battery runtime |
| Quiescent Current | 125µA typ. - minimizes standby power loss in always-on display subsystems |
| PWM Dimming Freq | Up to 150kHz - avoids audible noise and enables high-resolution brightness control |
| Thermal Shutdown | 150°C trip with 25°C hysteresis - protects device and LEDs during overtemperature events |
Pinout & Package
AP2502KTR-G1 is housed in a RoHS-compliant SOT-23-6 package (2.82 × 2.92 × 1.1 mm), optimized for space-constrained portable PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable / PWM input | Active-high logic input; accepts 0–6.5V PWM signal to modulate LED brightness without external driver |
| 2 (GND) | Ground reference | Common return path for all four current sinks and internal bias circuitry |
| 3 (LED4) | Channel 4 cathode sink | Sinks up to 20mA from connected LED anode; no external resistor required |
| 4 (LED3) | Channel 3 cathode sink | Independent sink terminal; matched performance with other channels within ±1% |
| 5 (LED2) | Channel 2 cathode sink | Provides precise 20mA current regulation with <65mV dropout at full load |
| 6 (LED1) | Channel 1 cathode sink | Primary output for single-LED or parallel-configured backlight segments |
Key Features
| Feature | Design Value |
|---|---|
| No external current-setting resistors | Reduces BOM count and layout area; eliminates resistor tolerance impact on current accuracy |
| Ultra-low EMI generation | Linear topology avoids switching noise - critical for RF-sensitive handheld devices |
| Single 0.1µF ceramic capacitor support | Minimizes external component count and cost while ensuring stable operation |
| Thermal shutdown with hysteresis | Prevents latch-up during transient overloads; automatic recovery after cooling |
| Green RoHS-compliant packaging | G1 suffix indicates lead-free, halogen-free construction meeting global environmental standards |
Applications
| Smartphone Backlight Control | Portable Media Player Display |
|---|---|
Use Scenario: Driving 4-segment white LED backlight in compact smartphone LCD modules powered by 3.7V Li-ion battery. IC Role / Device Role / Timing Role: Linear constant-current sink regulating cathode-side current per segment with PWM-based brightness scaling. Use Value: Eliminates switching noise interference with cellular RF front-end while maintaining ±1% brightness uniformity across segments. | Use Scenario: Powering dual-color status indicators and main backlight in MP3/MP4 players with tight board space constraints. IC Role / Device Role / Timing Role: Four-channel current sink enabling independent control of red/green/blue/white LEDs via shared EN PWM line. Use Value: Reduces component count versus discrete transistor+resistor solutions and extends battery life via 125µA quiescent current. |
| Handheld PDA Keypad Illumination | Small-Sized OLED Module Bias |
Use Scenario: Uniformly illuminating alphanumeric keypad LEDs in industrial PDAs operating across -40°C to +85°C ambient range. IC Role / Device Role / Timing Role: Temperature-stable current source delivering 20mA per LED with <1% matching drift over full temperature range. Use Value: Ensures consistent visual feedback regardless of operating environment, avoiding manual calibration or binning. | Use Scenario: Providing regulated bias current to OLED pixel rows in compact diagnostic equipment displays. IC Role / Device Role / Timing Role: Low-dropout linear sink enabling operation from 3.3V supply with minimal voltage overhead on OLED forward voltage. Use Value: Maximizes usable display contrast ratio by minimizing voltage loss between supply rail and OLED anodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED current sink applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL8862SP-13 | Switching buck LED driver; higher efficiency but generates EMI; requires inductor and diode | Better for high-current (>100mA) or multi-string configurations; unsuitable where EMI must be avoided | Select when system efficiency >85% is critical and RF isolation allows switching noise |
| ASL2415SHN | Automotive-grade 4-channel linear sink; ±2% matching; 100µA IQ; AEC-Q100 qualified | Designed for automotive infotainment displays; higher qualification cost and temp range (-40°C to +125°C) | Select only if AEC-Q100 compliance and extended temperature operation are mandatory |
Compared with AL8862SP-13 and ASL2415SHN, AP2502KTR-G1 offers superior EMI immunity and lowest BOM complexity for portable consumer displays, trading off efficiency for simplicity and noise-free operation in space- and noise-sensitive designs.
Availability
AP2502KTR-G1 is available at Aetrix Electronics and suitable for smartphone backlight control, portable media player display, handheld PDA keypad illumination, and small-sized OLED module bias requiring stable component supply and RoHS-compliant green packaging.
Supply support for AP2502KTR-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 and mixed-signal IC designer and foundry partner specializing in power management, LED drivers, and high-reliability interface solutions for consumer and industrial markets.
The AP2502 belongs to BCD's linear LED driver product line, engineered specifically for noise-sensitive portable electronics where EMI-free operation, minimal external components, and precise multi-channel current matching are essential design requirements.
FAQ
What is the maximum allowable input voltage for AP2502KTR-G1?
The absolute maximum enable input voltage (VEN) is 6.5V, and recommended operating VIN range is 3.3V to 6.0V. Exceeding 6.5V may cause permanent damage. The device is designed for single-cell Li-ion/Polymer battery systems (nominal 3.7V, max 4.2V), making 6.0V the practical upper limit for reliable long-term operation.
Can AP2502KTR-G1 drive LEDs in series configuration?
No - AP2502KTR-G1 is a cathode-side current sink and supports only common-anode LED connections. Each channel sinks current from one LED (or parallel LEDs sharing same anode node). Series LED strings require higher compliance voltage than the 65mV dropout allows, and the architecture does not support stacked cathode outputs.
Is external current-setting resistance required for AP2502KTR-G1?
No external resistor is needed. The AP2502 integrates precision current references and feedback circuitry to deliver factory-trimmed 20mA per channel. Only a 0.1µF ceramic bypass capacitor on VIN is required for stability - no Rset, no compensation network, no sense resistor.
Does AP2502KTR-G1 support analog dimming in addition to PWM?
No - brightness control is exclusively via PWM applied to the EN pin. There is no analog dimming interface (e.g., ICTRL or VREF pin); the device lacks variable reference or DAC-based current adjustment. Duty-cycle modulation of the EN signal is the sole supported dimming method, validated up to 150kHz.
AP2502KTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 2V
- Voltage - Supply (Max):
- 6V
- Voltage - Output:
- -
- Current - Output / Channel:
- 20mA
- Frequency:
- 150kHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
AP2502KTR-G1 FAQ
1.How can I place an order for AP2502KTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2502KTR-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 AP2502KTR-G1 reliable?
The price and inventory of AP2502KTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2502KTR-G1 is usually 5 days.
3.What payment methods are accepted for AP2502KTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2502KTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2502KTR-G1?
AP2502KTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2502KTR-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 AP2502KTR-G1?
For technical support, including AP2502KTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2502KTR-G1 requirements.
6.How does Aetrix verify that AP2502KTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP2502KTR-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 AP2502KTR-G1 meets industry standards.
7.What is the process for return or replacement of AP2502KTR-G1?
All AP2502KTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2502KTR-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 AP2502KTR-G1 part is unused and in its original packaging.
Return procedure for AP2502KTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP2502KTR-G1 Tags
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