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Diodes Incorporated AP8800AWT-7
- Part No.:
- AP8800AWT-7
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AP8800AWT-7.pdf
- Description:
- IC LED DRV RGLTR PWM TSOT25
- Quantity:
- Payment:
- Shipping:
Inventory:1,692
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Product details
Overview
AP8800AWT-7 from Diodes Incorporated is a constant-current step-down DC/DC LED driver IC designed for driving up to 7 series-connected LEDs from 8V–28V input. It delivers up to 370mA output current with ±5% accuracy, operates at up to 600kHz switching frequency, and supports both PWM and analog dimming via the CTRL pin. It is used in MR16 lamps and general illumination systems requiring compact, efficient LED biasing.
For engineers reviewing the AP8800AWT-7 datasheet, AP8800AWT-7 pinout, AP8800AWT-7 application, or AP8800AWT-7 equivalent, key selection criteria include its TSOT25 package, internal 1.25V reference, 1.5Ω typical RDS(ON), open-circuit LED protection, and compatibility with SBR1A40 freewheeling diodes in low-EMI buck configurations.
Technical Context
The AP8800AWT-7 implements a hysteretic (constant-on-time) control architecture with internal comparator thresholds of 95–105mV, enabling self-regulating LED current without external compensation. Its switch node (SW) drives an external inductor and Schottky diode, while current sensing occurs across an external resistor between VIN and SET pins.
Dimming is implemented through dual-mode control: analog dimming uses 0.3–2.5V DC on CTRL to scale output current from 24% to 200% of nominal, while PWM dimming applies low-voltage pulses ≤0.2V to disable the internal MOSFET. The device includes built-in open-LED fault detection that halts switching until fault clearance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 370mA; set externally via RSET using VTH ≈ 100mV threshold |
| Input Voltage Range | 8V to 28V; supports wide-range DC supplies including 12V MR16 and 24V industrial rails |
| Switching Frequency | Up to 600kHz; enables use of small 68–100µH inductors and reduces PCB area |
| Current Accuracy | Better than ±5%; maintained over temperature and input voltage variation |
| RDS(ON) | 1.5Ω typical; limits conduction loss and thermal rise in TSOT25 package |
| CTRL Pin Threshold | ≤0.2V disables output; 0.3–2.5V enables 24–200% analog dimming range |
| Thermal Resistance | 200°C/W (Junction-to-Ambient); requires minimum 25mm × 25mm 1oz copper pad with thermal vias |
Pinout & Package
AP8800AWT-7 is housed in a 5-pin TSOT25 (Thin Small Outline Transistor) package with exposed thermal pad. The package is RoHS-compliant, halogen-free, and lead-free, optimized for surface-mount assembly and thermal dissipation on FR-4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Power Switch Node | Connects to inductor and freewheeling diode; track length must be minimized to reduce EMI |
| GND (Pin 2) | Ground Reference | Primary return path for power and control circuits; connects to thermal pad for heat sinking |
| CTRL (Pin 3) | Dimming & Enable Control | Accepts 0.3–2.5V DC for analog dimming or ≤0.2V PWM for on/off control; 50kΩ input impedance |
| SET (Pin 4) | Current Sense Input | Connects to external RSET between VIN and SET; sets nominal LED current via 100mV internal threshold |
| VIN (Pin 5) | Input Supply | 8–28V DC input; requires ≥2.2µF X7R ceramic decoupling capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Hysteretic Regulation | Eliminates need for external compensation components; provides stable current control without loop stability concerns |
| Open-Circuit LED Protection | Automatically halts switching if LED string opens; prevents overvoltage stress on output components |
| Soft-Start Capability | External capacitor on CTRL pin enables controlled ramp-up of LED current (0.5ms/nF delay) |
| Low Quiescent Current | 300µA typical at 12V input; minimizes standby power loss in always-on lighting applications |
| Integrated Power MOSFET | 1.5Ω RDS(ON) switch enables high efficiency (>95%) without external FET or gate driver |
Applications
| MR16 Lamp Driver | Architectural Accent Lighting |
|---|---|
|
Use Scenario: Driving single or multi-chip 1W white LEDs in 12V AC/DC MR16 retrofit lamps. IC Role / Device Role / Timing Role: Constant-current buck regulator providing precise LED bias and analog/PWM dimming interface. Use Value: Enables uniform brightness across series LEDs without ballast resistors; supports TRIAC-dimmable AC drivers via CTRL pin filtering. |
Use Scenario: Low-profile linear LED strips in retail display cases and museum lighting. IC Role / Device Role / Timing Role: Compact, thermally efficient current source operating from 24V distributed supply rails. Use Value: TSOT25 footprint allows dense placement on narrow PCBs; 600kHz operation permits miniature 68µH inductors. |
| Industrial Panel Indicator | Emergency Exit Sign Illumination |
|
Use Scenario: High-reliability status indicators in factory HMIs and control panels powered from 24V DC bus. IC Role / Device Role / Timing Role: Robust LED driver with open-circuit fault detection and -40°C to +105°C ambient operation. Use Value: Eliminates LED failure-induced system faults; maintains regulated current despite input ripple or voltage sag. |
Use Scenario: Battery-backed LED arrays in UL924-compliant exit signs operating from 12V sealed lead-acid or LiFePO4 packs. IC Role / Device Role / Timing Role: Efficient current regulator supporting wide input range (8–28V) during battery discharge and charger float cycles. Use Value: >95% efficiency extends backup runtime; shutdown current <30µA preserves battery charge during standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL8860WUT-7 | Pin-compatible successor; higher 400mA max output, improved 1.2% current accuracy, integrated soft-start | Supports higher-power LED strings and tighter binning requirements; replaces AP8800A in new designs per Diodes Inc. notice | Select AL8860WUT-7 for new designs requiring extended lifetime, lower thermal drift, or simplified layout (no external soft-start cap needed) |
| AL8861WUT-7 | Same pinout as AL8860 but adds enable pin and adjustable switching frequency (200–2000kHz) | Enables synchronization to external clock or noise-sensitive environments; supports dynamic frequency scaling for EMI reduction | Choose AL8861WUT-7 when system-level EMI compliance or timing coordination with other converters is required |
Compared with AP8800AWT-7, AL8860WUT-7 offers higher accuracy and integrated soft-start for reduced design effort, while AL8861WUT-7 adds frequency control and enable functionality-both maintain identical TSOT25 footprint and support drop-in replacement in existing layouts.
Availability
AP8800AWT-7 is available at Aetrix Electronics and suitable for MR16 lamp manufacturing, architectural accent lighting, and industrial panel indicator applications requiring stable component supply and long-term production continuity.
Supply support for AP8800AWT-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and LED lighting solutions for industrial, automotive, and consumer markets.
The AP8800A belongs to Diodes' cost-optimized LED driver product line, designed specifically for high-volume, space-constrained general illumination applications where simplicity, thermal efficiency, and minimal BOM count are critical.
FAQ
What is the maximum number of LEDs the AP8800AWT-7 can drive in series?
The AP8800AWT-7 can drive up to 7 LEDs in series, depending on their forward voltage. At 28V input and typical 3.4V LED VF, it supports ~7 LEDs (23.8V total); at 12V input, it supports ~3 LEDs. The device regulates current regardless of string voltage, provided VIN exceeds total VF plus diode and switch losses.
How is LED current set and adjusted on the AP8800AWT-7?
LED current is set by an external resistor RSET between VIN and SET pins, using ILED = VTH/RSET where VTH ≈ 100mV. It is adjusted via CTRL pin: 0.3–2.5V DC scales output from 24% to 200% of nominal, while PWM signals ≤0.2V enable digital on/off control with duty-cycle-dependent average current.
Does the AP8800AWT-7 require external compensation components?
No. The AP8800AWT-7 uses a hysteretic (constant-on-time) control architecture that does not require external compensation networks. Stability is inherent to the topology, eliminating phase-margin analysis and simplifying design to just four external components: inductor, freewheeling diode, input capacitor, and RSET.
What thermal management is required for reliable operation at full load?
At 370mA output and 28V input, the AP8800AWT-7 dissipates ~120mW in the TSOT25 package. To maintain TJ ≤105°C in still air, it requires a minimum 25mm × 25mm 1oz copper pad with ≥4 thermal vias to inner ground planes. Derating begins above 65°C ambient per the published curve.
AP8800AWT-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 8V
- Voltage - Supply (Max):
- 28V
- Voltage - Output:
- -
- Current - Output / Channel:
- 370mA (Switch)
- Frequency:
- 600kHz
- Dimming:
- Analog, PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-25
AP8800AWT-7 FAQ
1.How can I place an order for AP8800AWT-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP8800AWT-7 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 AP8800AWT-7 reliable?
The price and inventory of AP8800AWT-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP8800AWT-7 is usually 5 days.
3.What payment methods are accepted for AP8800AWT-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP8800AWT-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP8800AWT-7?
AP8800AWT-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP8800AWT-7 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 AP8800AWT-7?
For technical support, including AP8800AWT-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP8800AWT-7 requirements.
6.How does Aetrix verify that AP8800AWT-7 is sourced from the original manufacturer or authorized distributors?
All AP8800AWT-7 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 AP8800AWT-7 meets industry standards.
7.What is the process for return or replacement of AP8800AWT-7?
All AP8800AWT-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP8800AWT-7, 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 AP8800AWT-7 part is unused and in its original packaging.
Return procedure for AP8800AWT-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP8800AWT-7 Tags
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BCR430UXTSA2
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BCR420UE6433HTMA1
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HV9910CLG-G
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CL2N8-G
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BCR420UW6-7
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