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Diodes Incorporated AP5724WUG-7
- Part No.:
- AP5724WUG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
AP5724WUG-7.pdf
- Description:
- IC LED DRVR RGLTR PWM TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,546
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Product details
Overview
AP5724WUG-7 from Diodes Incorporated is a white LED step-up DC/DC converter with integrated 0.95 Ω MOSFET, 1.2 MHz fixed-frequency switching, 0.1 V feedback reference, and overvoltage protection. It drives 2–6 series white LEDs from a 2.7–5.5 V Li-ion input and supports parallel-string configurations via single feedback. Used in portable backlighting for handheld displays.
For engineers reviewing the AP5724WUG-7 datasheet, AP5724WUG-7 pinout, AP5724WUG-7 application, or AP5724WUG-7 equivalent, key selection criteria include constant-current accuracy (±10% over temp), OVP threshold (30 V typ), thermal shutdown at 150°C, and TSOT26 package compatibility with high-density PCB layouts.
Technical Context
The AP5724WUG-7 implements a current-mode boost architecture with internal 1.2 MHz oscillator, ramp generator, and comparator-based control loop. Its 0.1 V feedback reference minimizes I²R loss in RSET while enabling precise LED current regulation independent of forward voltage variation across strings.
Protection logic includes under-voltage lockout (2.3 V typ), overvoltage detection (30 V at OVP pin), thermal shutdown (150°C), and cycle-by-cycle current limiting (750 mA). Soft-start prevents inrush current during startup, and EN pin enables direct PWM dimming control below 2 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.2 MHz - Enables use of compact 22 µH inductors and 1 µF ceramic capacitors. |
| Feedback Voltage | 0.1 V ±10 mV - Sets LED current via RSET = 0.1 V / ILED; reduces power loss in current-sense resistor. |
| Input Voltage Range | 2.7 V to 5.5 V - Matches single-cell Li-ion battery discharge profile (fully supports 3.0–4.2 V operating window). |
| OVP Threshold | 30 V typ - Protects SW and OVP pins during open-circuit LED failure; clamps output before exceeding 34 V absolute max. |
| MOSFET RDS(on) | 0.95 Ω typ - Limits conduction loss at peak switch current; supports ≥750 mA current limit without external FET. |
| Quiescent Current | 500 µA typ - Minimizes battery drain in standby; drops to 0.1 µA in shutdown mode (EN < 0.4 V). |
| UVLO Threshold | 2.3 V typ with 85 mV hysteresis - Prevents erratic operation during battery brownout; ensures clean restart above 2.385 V. |
Pinout & Package
AP5724WUG-7 uses the TSOT26 (Thin Small Outline Transistor, 6-pin) package: 2.9 mm × 2.8 mm × 0.9 mm body, 0.95 mm pitch, exposed pad for thermal dissipation. Pin 1 marked by beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Power Switch Node | Connects to inductor and Schottky diode anode; high dv/dt node requiring minimal trace area to reduce EMI. |
| VIN | Input Supply | Accepts 2.7–5.5 V; requires local 1 µF ceramic bypass capacitor to suppress input ripple and noise. |
| OVP | Overvoltage Sense Input | Monitors output via resistive divider; triggers shutdown when voltage exceeds 30 V (typ) to protect SW pin. |
| FB | Current-Sense Feedback | 0.1 V reference node; connects to cathode of lowest LED + RSET; bias current ≤100 nA ensures accuracy. |
| EN | Enable Control | Active-high logic input (1.5 V min); must not float-tie to VIN for automatic startup or drive with PWM for dimming. |
| GND | Power Ground | Primary return path for switch current and feedback; connect to exposed pad for optimal thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| High Efficiency | 84% typical at 25 mA output - Achieved via low RDS(on), 1.2 MHz switching, and 0.1 V FB reference minimizing sense loss. |
| Integrated Protections | UVLO, OVP, thermal shutdown, and cycle-by-cycle current limit - Eliminates need for external fault management circuitry. |
| Soft-Start Function | Internal ramp limits inrush current during startup - Prevents input voltage sag and output overshoot on power-up. |
| Green Packaging | Halogen- and antimony-free molding compound; lead-free RoHS-compliant finish - Meets EU Directive 2011/65/EU requirements. |
| Compact Footprint | TSOT26 package (2.9 × 2.8 mm) - Enables integration into space-constrained portable devices like GPS receivers and MP3 players. |
Applications
| Cellular Phone Backlighting | Digital Camera Flash/Backlight |
|---|---|
|
Use Scenario: Driving 4–6 white LEDs for main display backlight in GSM/UMTS smartphones with single Li-ion cell. IC Role / Device Role / Timing Role: Constant-current boost controller regulating LED string current at 20 mA with ±5% matching across all LEDs. Use Value: Uniform brightness without ballast resistors; 84% efficiency extends talk time by >8% versus discrete solutions. |
Use Scenario: Powering dual white LED flash array and LCD backlight in compact digital cameras with 3.7 V battery. IC Role / Device Role / Timing Role: Dual-mode operation: steady backlight (EN high) and pulsed flash (PWM-dimmed EN at 1 kHz). Use Value: Single IC replaces two drivers; OVP prevents damage during flash capacitor charging transients. |
| GPS Receiver Display | MP3 Player UI Lighting |
|
Use Scenario: Illuminating high-contrast monochrome or color TFT display in automotive/handheld GPS units. IC Role / Device Role / Timing Role: Boost converter with UVLO hysteresis ensuring stable operation across full battery range (4.2 V → 3.0 V). Use Value: Maintains consistent luminance down to 3.0 V input; thermal shutdown prevents overheating in sealed enclosures. |
Use Scenario: Controlling brightness of OLED or segment LCD indicators and button backlights in portable audio players. IC Role / Device Role / Timing Role: Dimming interface via DC voltage on EN pin or filtered PWM signal for smooth brightness transitions. Use Value: 0–20 mA linear dimming range using external resistors; eliminates flicker and audible noise in audio-sensitive designs. |
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 |
|---|---|---|---|
| AP3606W6-7 | Higher 1.5 MHz switching frequency; 0.2 V FB reference; no OVP pin. | Lacks dedicated overvoltage protection; requires external OVP circuit for open-circuit LED safety. | Prefer when board space is tighter and OVP can be implemented externally. |
| AL8862SP-7 | Adjustable 100–2000 kHz frequency; 0.25 V FB; integrated high-side current sense. | Supports analog dimming only; no EN pin for PWM control; larger SO-8 package. | Choose when variable frequency is needed to avoid EMI bands or when higher current (>30 mA) is required. |
Compared with AP3606W6-7 and AL8862SP-7, the AP5724WUG-7 uniquely combines integrated OVP, ultra-low 0.1 V FB, and TSOT26 footprint-making it optimal for cost-sensitive, safety-critical portable backlighting where reliability and layout simplicity are prioritized over programmability.
Availability
AP5724WUG-7 is available at Aetrix Electronics and suitable for cellular phone backlighting, digital camera flash systems, GPS receiver displays, and MP3 player UI lighting requiring stable component supply and long-term production continuity.
Supply support for AP5724WUG-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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The AP5724 belongs to Diodes' LED driver product line, engineered specifically for portable device backlighting-emphasizing small size, high efficiency, and robust protection in battery-powered applications.
FAQ
What is the maximum number of white LEDs the AP5724WUG-7 can drive in series?
The AP5724WUG-7 is rated to drive 2–6 white LEDs in series from a 3.6 V input, assuming typical VF of 3.2 V per LED (19.2 V max output). With 22 µH inductor and 30 V OVP threshold, six LEDs represent the practical limit for safe operation within absolute maximum ratings.
Can the AP5724WUG-7 support analog dimming without PWM?
Yes-the EN pin accepts a variable DC voltage (0–2 V) to linearly adjust LED current from 0 to full scale. As shown in Figure 3 of the datasheet, a resistor network (R2 = 5 kΩ, R3 = 100 kΩ) converts VDC into reduced FB voltage, enabling smooth analog dimming without flicker or EMI concerns.
Does the AP5724WUG-7 require an external Schottky diode?
Yes-an external Schottky diode is mandatory. The AP5724WUG-7 integrates only the power MOSFET (SW pin), not the flyback diode. Recommended parts include B0540WS (40 V/0.5 A, SOD323) or SDM20U40 (40 V/0.25 A, SOD523), selected for low VF and minimal capacitance at 1.2 MHz.
How does the OVP function protect the AP5724WUG-7 during LED open-circuit failure?
During open-circuit failure, FB voltage drops to 0 V, causing the controller to increase duty cycle until output rises. When the divided output voltage at the OVP pin reaches 30 V (typ), the internal comparator disables the SW driver, halting switching and clamping output to prevent SW pin overvoltage beyond its 34 V absolute maximum rating.
AP5724WUG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- 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:
- TSOT-23-6
AP5724WUG-7 FAQ
1.How can I place an order for AP5724WUG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP5724WUG-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 AP5724WUG-7 reliable?
The price and inventory of AP5724WUG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP5724WUG-7 is usually 5 days.
3.What payment methods are accepted for AP5724WUG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP5724WUG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP5724WUG-7?
AP5724WUG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP5724WUG-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 AP5724WUG-7?
For technical support, including AP5724WUG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP5724WUG-7 requirements.
6.How does Aetrix verify that AP5724WUG-7 is sourced from the original manufacturer or authorized distributors?
All AP5724WUG-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 AP5724WUG-7 meets industry standards.
7.What is the process for return or replacement of AP5724WUG-7?
All AP5724WUG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP5724WUG-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 AP5724WUG-7 part is unused and in its original packaging.
Return procedure for AP5724WUG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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