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Diodes Incorporated AP5726FDCG-7
- Part No.:
- AP5726FDCG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP5726FDCG-7.pdf
- Description:
- IC LED DRVR RGLTR PWM 750MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,752
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Product details
Overview
AP5726FDCG-7 from Diodes Incorporated is a white LED step-up DC/DC converter IC with integrated 750mA MOSFET switch, designed to drive 2–6 series-connected LEDs from a 2.7–5.5V Li-ion input. It delivers constant current via 0.31V feedback reference, operates at 1.2MHz switching frequency, and includes overvoltage protection (OVP threshold: 30V), thermal shutdown, and soft-start. Used in portable backlighting for digital cameras and GPS receivers.
For engineers reviewing the AP5726FDCG-7 datasheet, AP5726FDCG-7 pinout, AP5726FDCG-7 application, or AP5726FDCG-7 equivalent, key selection criteria include its 0.31V FB reference for precision current setting, DFN2020C-6 package footprint compatibility, 1.2MHz operation enabling compact 22µH inductors, and OVP-triggered shutdown for open-circuit LED protection.
Technical Context
The AP5726FDCG-7 implements a current-mode boost controller with internal 750mA/0.95Ω MOSFET, 1.2MHz oscillator, and analog feedback loop referenced to 0.31V. Its control logic integrates UVLO (2.4V turn-on), soft-start, and cycle-by-cycle current limiting.
OVP detection occurs at the dedicated OVP pin with 30V threshold; shutdown is triggered when output exceeds this level. The device supports PWM dimming via EN pin and DC voltage dimming through FB node injection, both validated in typical application circuits with 22µH inductor and 1µF ceramic capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion battery operation without external regulation. |
| Switching Frequency | 1.2MHz - enables use of small 22µH inductors and 1µF ceramic capacitors, reducing board area. |
| Feedback Reference | 0.31V ±3% - minimizes I²R loss in current-sense resistor, improving efficiency at high LED currents. |
| Current Limit | 750mA - sets peak inductor current limit to prevent saturation and ensure stable boost operation. |
| OVP Threshold | 30V ±4V - protects SW and OVP pins during LED string open-circuit failure. |
| Thermal Resistance θJA | 200°C/W - specified for DFN2020C-6 on FR-4 with minimum pad layout; dictates derating above 85°C ambient. |
| Quiescent Current | 500μA - ensures low standby power in battery-powered devices with EN-controlled sleep mode. |
Pinout & Package
AP5726FDCG-7 is housed in a 2.0mm × 2.0mm × 0.65mm DFN2020C-6 package with exposed thermal pad (pin 4 = GND). Pin 1 marked by top-side dot; pin numbering follows standard counter-clockwise sequence from mark.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW) | Power Switch Node | Connects to inductor and Schottky diode anode; high dv/dt node requiring minimized trace area to reduce EMI. |
| 2 (VIN) | Input Supply | Accepts 2.7–5.5V input; requires local 1µF ceramic bypass capacitor to suppress input ripple and noise. |
| 3 (OVP) | Overvoltage Sense Input | Monitors output via resistive divider; triggers shutdown if voltage exceeds 30V threshold. |
| 4 (GND) | Ground Reference | Power and signal ground; connects to exposed thermal pad for optimal heat dissipation. |
| 5 (FB) | Current Sense Feedback | Compares LED current sense voltage against 0.31V reference; determines RSET value per ILED = 0.31V/RSET. |
| 6 (EN) | Enable Control | Active-high logic input; 1.5V min high-level voltage; must not be left floating-tie to VIN for always-on operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 750mA MOSFET | Eliminates external switch, reduces BOM count, and ensures matched gate drive timing for 1.2MHz operation. |
| 0.31V Feedback Reference | Enables <1% LED current accuracy with 1% RSET; cuts power loss in sense resistor by >50% vs. 1.25V references. |
| 1.2MHz Fixed-Frequency Operation | Permits use of 22µH inductors ≤4mm² footprint and 1µF X5R/X7R ceramics, minimizing solution size. |
| Dedicated OVP Pin with 30V Threshold | Provides autonomous shutdown during LED string disconnection-no external comparator or delay circuit needed. |
| Internal Soft-Start | Prevents inrush current and output overshoot during startup; eliminates need for external RC timing network. |
Applications
| Cellular Phone Backlight | Digital Camera LCD Backlight |
|---|---|
|
Use Scenario: Driving 4–6 white LEDs for main display backlight in slim smartphone designs with single Li-ion cell. IC Role / Device Role / Timing Role: Constant-current boost controller regulating LED string current independent of forward voltage variation across temperature and aging. Use Value: Enables uniform brightness without ballast resistors; 84% typical efficiency extends battery runtime between charges. |
Use Scenario: Powering high-brightness WLED array behind 3.0"–4.3" LCD viewfinder and rear screen in compact digital cameras. IC Role / Device Role / Timing Role: High-frequency (1.2MHz) step-up converter delivering stable 20–30mA per LED string under dynamic battery discharge (3.6V → 2.8V). Use Value: Small DFN2020C-6 footprint saves PCB space; OVP protection prevents damage during accidental LED disconnect during lens retraction. |
| GPS Receiver Display | MP3 Player OLED Interface |
|
Use Scenario: Illuminating monochrome or color TFT display in automotive/handheld GPS units operating across -40°C to +85°C ambient range. IC Role / Device Role / Timing Role: Temperature-stable current source (±1.5% VFB drift over -40°C to +125°C) maintaining consistent luminance in varying environments. Use Value: UVLO (2.4V) prevents erratic behavior during battery brownout; thermal shutdown protects against enclosure overheating in sealed units. |
Use Scenario: Driving segmented or full-color OLED interface in portable audio players where EMI-sensitive analog audio paths coexist on same PCB. IC Role / Device Role / Timing Role: Low-noise boost regulator using ceramic caps and shielded inductor to minimize conducted/radiated emissions near audio DAC and amplifier stages. Use Value: 1.2MHz switching avoids AM radio band (530–1710kHz); SW pin layout guidance reduces coupling into adjacent signal traces. |
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 |
|---|---|---|---|
| AP3606WU-7 | Lower 600mA switch current; 0.25V FB reference; no OVP pin (relies on external sensing). | Suitable only for ≤4-LED strings at ≤20mA; requires external OVP circuit for open-circuit protection. | Select when cost sensitivity outweighs protection robustness and higher LED count capability. |
| RT9397BZSP | 1.3MHz switching; 0.26V FB; integrated soft-start; no dedicated OVP pin but includes output short-circuit protection. | Lacks autonomous OVP shutdown-requires external resistor divider and comparator for open-circuit response. | Choose for tighter FB tolerance (±1%) and higher frequency, but accept added design complexity for fault handling. |
Compared with AP3606WU-7 and RT9397BZSP, AP5726FDCG-7 uniquely combines 750mA current capability, 30V OVP threshold with dedicated pin, and 0.31V reference in DFN2020C-6-making it optimal for 5–6 LED strings in space-constrained, safety-aware portable designs.
Availability
AP5726FDCG-7 is available at Aetrix Electronics and suitable for cellular phone backlighting, digital camera LCD illumination, and GPS receiver display systems requiring stable component supply, RoHS-compliant packaging, and long-lifecycle availability.
Supply support for AP5726FDCG-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 high-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and computing markets.
The AP5726 belongs to Diodes' white LED driver product line, engineered specifically for compact, battery-powered portable displays requiring precise constant-current regulation, minimal external components, and robust fault protection.
FAQ
What is the maximum number of white LEDs the AP5726FDCG-7 can drive in series?
The AP5726FDCG-7 is rated to drive 2–6 white LEDs in series from a 2.7–5.5V input. With typical white LED VF ≈ 3.2V, six LEDs require ~19.2V output, which remains within the 30V OVP threshold and 34V SW pin rating. Driving more than six LEDs risks exceeding safe operating limits and triggering OVP shutdown.
Can the AP5726FDCG-7 support parallel LED strings?
Yes-the AP5726FDCG-7 supports single-feedback control of multiple parallel LED strings, provided each string contains an equal number of series LEDs. This configuration maintains current matching across strings without individual ballast resistors, leveraging the device's constant-current regulation architecture.
What is the recommended inductor value and type for AP5726FDCG-7?
Diodes recommends a 22µH shielded power inductor with ≥0.51A saturation current and low DCR (e.g., Wurth 744031220 or Taiyo Yuden NR4012). Core material must support low losses at 1.2MHz; ferrite or metal alloy cores are preferred over powdered iron for efficiency and thermal stability.
Does the AP5726FDCG-7 require external components for thermal protection?
No-the AP5726FDCG-7 includes internal thermal shutdown that activates at 150°C junction temperature. No external thermistor or monitoring circuit is needed. However, proper PCB layout-including connection of the exposed thermal pad (pin 4) to a ≥40mm² copper pour-is essential to achieve the specified 200°C/W θJA and avoid premature shutdown.
AP5726FDCG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 750mA (Switch)
- Frequency:
- 1.2MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- U-DFN2020-6 (Type C)
AP5726FDCG-7 FAQ
1.How can I place an order for AP5726FDCG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP5726FDCG-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 AP5726FDCG-7 reliable?
The price and inventory of AP5726FDCG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP5726FDCG-7 is usually 5 days.
3.What payment methods are accepted for AP5726FDCG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP5726FDCG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP5726FDCG-7?
AP5726FDCG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP5726FDCG-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 AP5726FDCG-7?
For technical support, including AP5726FDCG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP5726FDCG-7 requirements.
6.How does Aetrix verify that AP5726FDCG-7 is sourced from the original manufacturer or authorized distributors?
All AP5726FDCG-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 AP5726FDCG-7 meets industry standards.
7.What is the process for return or replacement of AP5726FDCG-7?
All AP5726FDCG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP5726FDCG-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 AP5726FDCG-7 part is unused and in its original packaging.
Return procedure for AP5726FDCG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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