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Analog Devices Inc. ADD5207ACPZ-RL
- Part No.:
- ADD5207ACPZ-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 14-WFDFN Exposed Pad, CSP
- Datasheet:
-
ADD5207ACPZ-RL.pdf
- Description:
- IC LED DRV RGLTR PWM 14LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,781
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Product details
Overview
ADD5207ACPZ-RL from Analog Devices is a four-string white LED driver IC for LCD backlighting, based on a current-mode inductive boost converter with integrated 40 V/1.5 A MOSFET, 6–21 V input range, up to 36 V output, and ±1.5% string current matching at 20 mA - deployed in notebook PC and monitor display power stages.
For engineers reviewing the ADD5207ACPZ-RL datasheet, ADD5207ACPZ-RL pinout, ADD5207ACPZ-RL application, or ADD5207ACPZ-RL equivalent, key selection criteria include its 8 kHz fixed PWM dimming frequency, 90° inter-string phase shift in 4-channel mode, headroom-controlled efficiency optimization, and LFCSP-14 (4 mm × 3 mm) thermally enhanced package for high-density backlight designs.
Technical Context
The ADD5207ACPZ-RL implements a current-mode step-up regulator with user-adjustable 600 kHz–1 MHz switching frequency via external RF resistor, and integrates four independent, matched current sinks (FB1–FB4) each adjustable up to 25 mA via ISET pin and RSET resistor. Its internal 3.3 V linear regulator (VDD) powers bias circuitry and requires a 1 µF bypass capacitor.
Safety architecture includes fixed 39 V typical overvoltage protection (OVP) on the OVP pin, LED open-fault detection per channel with automatic disable, thermal shutdown at 160°C (30°C hysteresis), and undervoltage lockout activating at 5.0 V rising threshold. Phase-shifted PWM dimming provides 90° (4-string) or 120° (3-string) inter-channel timing to reduce input/output ripple.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6 V to 21 V - supports wide-range DC supplies including 12 V rail and automotive-derived inputs. |
| Max Output Voltage | 36 V - sufficient to drive up to 10 series white LEDs (3.4 V each) per string. |
| LED Current per String | 0–25 mA - set precisely via external RSET; 20 mA achieved with 180 kΩ, ±3% accuracy. |
| Current Matching | ±1.5% between strings - ensures uniform brightness across all four LED channels without external calibration. |
| Switching Frequency | 600 kHz to 1 MHz - selectable via RF resistor; higher frequencies minimize inductor/capacitor size, lower optimize efficiency. |
| PWM Dimming Frequency | Fixed 8 kHz - avoids audible noise while enabling >100:1 effective dimming range (1.5%–100% duty). |
| OVP Threshold | 39 V typical - protects boost stage and LEDs from overvoltage during open-circuit or regulation fault. |
| Package | 14-lead LFCSP (4 mm × 3 mm × 0.75 mm) - low thermal resistance (θJA = 33.24°C/W) enables high-power density layout. |
Pinout & Package
ADD5207ACPZ-RL uses a 14-lead, RoHS-compliant, thermally enhanced lead frame chip scale package (LFCSP) measuring 4 mm × 3 mm × 0.75 mm, with exposed paddle soldered to ground for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power Input | Primary supply input (6–21 V); requires local 10 µF ceramic bypass to GND for stability. |
| FSLCT (Pin 2) | Frequency Select | Resistor-to-GND sets boost switching frequency (600 kHz–1 MHz); 97 kΩ yields 800–1000 kHz. |
| ISET (Pin 3) | Current Set Reference | 1.18 V reference drives RSET to set full-scale LED current; 180 kΩ → 20 mA per string. |
| FB1–FB4 (Pins 4–7) | Current Sink Outputs | Four regulated cathode return nodes; each sinks up to 25 mA; FB4 must be grounded if unused. |
| VDD (Pin 8) | Internal Regulator Output | 3.3 V ±0.2 V supply for internal circuitry; requires 1 µF bypass capacitor to GND. |
| PWM (Pin 9) | Brightness Control Input | Accepts 100 Hz–10 kHz PWM signal; 8 kHz internal oscillator synchronizes dimming across all strings. |
| SHDN (Pin 10) | Active-Low Enable | Logic-low disables device; draws only 2 µA in shutdown; compatible with 3.3 V/5 V logic. |
| COMP (Pin 11) | Loop Compensation | Connect RC network (e.g., 6.8 kΩ + 2.2 nF) for stable boost regulation under varying load/input conditions. |
| GND (Pin 12) | Ground Reference | Common return for power, analog, and digital sections; connect exposed paddle directly to this node. |
| OVP (Pin 13) | Overvoltage Monitor | Direct connection to boost output; triggers shutdown when voltage exceeds ~39 V (typical). |
| SW (Pin 14) | Power Switch Drain | Drain of internal 40 V/1.5 A MOSFET; connects to inductor and Schottky diode anode. |
Key Features
| Feature | Design Value |
|---|---|
| Four-Channel Phase-Shifted PWM | 90° inter-string phase delay reduces input/output ripple amplitude and EMI in multi-string backlight systems. |
| Headroom-Controlled Efficiency | Dynamically minimizes boost output voltage to just above required LED forward voltage, reducing power loss in current sinks. |
| Integrated 40 V/1.5 A MOSFET | Eliminates external switch; 150 mΩ typical RDS(ON) enables high-efficiency operation without discrete FET layout complexity. |
| Per-String Open-Fault Protection | Each FBx pin independently detects open-circuit LED strings and disables only the affected channel - preserving backlight functionality. |
| Soft Start (1.1 ms typical) | Prevents inrush current at startup by gradually ramping LED current and boost output voltage. |
| Industrial Temp Range | Specified from −25°C to +85°C ambient - suitable for commercial and extended-temperature display applications. |
Applications
| Notebook PC Backlight | Monitor Display Backlight |
|---|---|
Use Scenario: Driving 4 parallel strings of 8–10 series white LEDs behind 13–15.6-inch LCD panels with dynamic brightness control. IC Role / Device Role / Timing Role: Primary LED current controller and boost power stage; delivers matched current with 90° phase-shifted PWM dimming. Use Value: Enables uniform luminance, low EMI, and flicker-free dimming down to 1.5% duty cycle without audible noise. | Use Scenario: Powering dual-zone or edge-lit 21–27-inch desktop monitors requiring stable, high-current LED strings. IC Role / Device Role / Timing Role: Four-channel constant-current sink with headroom optimization and OVP-protected boost conversion. Use Value: Maintains consistent brightness across large-area backlights while minimizing thermal stress and power loss. |
| UMPC Display Backlight | Industrial Panel Backlight |
Use Scenario: Compact, low-profile backlight solution for ultra-mobile PCs with space-constrained PCB layouts. IC Role / Device Role / Timing Role: Integrated boost + current regulation in 4 mm × 3 mm LFCSP; supports 6–21 V input without external FET. Use Value: Reduces BOM count and board area versus discrete boost + current-source solutions; simplifies thermal design. | Use Scenario: Reliable backlight for industrial HMI displays operating in −25°C to +85°C environments with frequent on/off cycling. IC Role / Device Role / Timing Role: Fault-tolerant LED driver with thermal shutdown, UVLO, and per-string open-fault detection. Use Value: Ensures continuous operation despite single-string failure and prevents damage during cold-start or brownout conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409QMY/NOPB | Single-channel, external MOSFET, 4.5–32 V input, no integrated current sinks or phase-shifted PWM. | Requires external current-setting circuitry per string; not suited for multi-string synchronous dimming. | Choose when designing custom multi-phase controllers or needing higher voltage/current scalability. |
| TPS61165DRVR | Single-string, 2.7–6 V input, integrated 40 V switch, but lacks multi-string support and phase-shifting capability. | Designed for portable devices with low-input-voltage battery sources; cannot replace 4-string topology directly. | Consider only for cost-sensitive single-string applications where input voltage is below 6 V. |
Compared with LM3409QMY/NOPB and TPS61165DRVR, the ADD5207ACPZ-RL uniquely integrates four matched current sinks, 90° phase-shifted PWM, and headroom control in one LFCSP package - eliminating discrete current-setting components and reducing system-level EMI filtering requirements for LCD backlighting.
Availability
ADD5207ACPZ-RL is available at Aetrix Electronics and suitable for notebook PCs, monitor displays, and UMPC backlighting requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ADD5207ACPZ-RL 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and automotive markets.
The ADD5207ACPZ-RL belongs to Analog Devices' specialized LED backlight driver product line, engineered for high-efficiency, multi-string LCD panel illumination with integrated protection and minimal external component count.
FAQ
What is the maximum number of LEDs the ADD5207ACPZ-RL can drive per string?
The ADD5207ACPZ-RL can drive up to 10 series-connected white LEDs per string, assuming typical 3.4 V forward voltage and 25 mA current, supported by its 36 V maximum output voltage and headroom control architecture. This is confirmed in the General Description section and Typical Application Circuit on Page 1 of the Rev. A datasheet.
Does the ADD5207ACPZ-RL support three-string operation, and how is it configured?
Yes, the ADD5207ACPZ-RL supports three-string operation by connecting LED strings to FB1, FB2, and FB3, while tying FB4 to GND. In this configuration, the internal phase-shift logic applies 120° delay between channels instead of 90°, reducing ripple and improving thermal distribution across the device - as specified in the Theory of Operation section on Page 11.
What is the purpose of the FSLCT pin on the ADD5207ACPZ-RL, and what resistor value sets 800 kHz operation?
The FSLCT pin on the ADD5207ACPZ-RL sets the boost switching frequency via an external resistor to GND. A 97 kΩ resistor yields a typical switching frequency of 800–1000 kHz, as shown in Table 1 (Step-Up Switching Regulator Specifications) and Figure 14 (Switching Frequency vs. RF) on Page 11 of the datasheet.
How does the ADD5207ACPZ-RL handle an open LED fault in one string?
The ADD5207ACPZ-RL detects open LED faults per string using headroom voltage monitoring: if the FBx pin voltage remains below 150 mV while the boost output reaches OVP level, the corresponding current sink is automatically disabled. Other strings continue operating normally - a feature documented in the Safety Features section on Page 12 and Pin Function Descriptions on Page 8.
Is the ADD5207ACPZ-RL pin-compatible with any other Analog Devices LED drivers?
No documented pin-compatible replacements exist for the ADD5207ACPZ-RL within Analog Devices' portfolio. Its 14-lead LFCSP layout, FBx pin assignment, and integrated 4-string architecture are unique to this part; migration would require PCB redesign and firmware adaptation - as confirmed by cross-referencing Analog Devices' LED driver product matrix and ordering guide on Page 16.
ADD5207ACPZ-RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 6V
- Voltage - Supply (Max):
- 21V
- Voltage - Output:
- 36V
- Current - Output / Channel:
- 25mA
- Frequency:
- 1MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -25°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-LFCSP (4x3)
ADD5207ACPZ-RL FAQ
1.How can I place an order for ADD5207ACPZ-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADD5207ACPZ-RL 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 ADD5207ACPZ-RL reliable?
The price and inventory of ADD5207ACPZ-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADD5207ACPZ-RL is usually 5 days.
3.What payment methods are accepted for ADD5207ACPZ-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADD5207ACPZ-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADD5207ACPZ-RL?
ADD5207ACPZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADD5207ACPZ-RL 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 ADD5207ACPZ-RL?
For technical support, including ADD5207ACPZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADD5207ACPZ-RL requirements.
6.How does Aetrix verify that ADD5207ACPZ-RL is sourced from the original manufacturer or authorized distributors?
All ADD5207ACPZ-RL 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 ADD5207ACPZ-RL meets industry standards.
7.What is the process for return or replacement of ADD5207ACPZ-RL?
All ADD5207ACPZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with ADD5207ACPZ-RL, 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 ADD5207ACPZ-RL part is unused and in its original packaging.
Return procedure for ADD5207ACPZ-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADD5207ACPZ-RL Tags
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