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Analog Devices Inc. ADP8140ACPZ-2-R7
- Part No.:
- ADP8140ACPZ-2-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 16-WFDFN Exposed Pad, CSP
- Datasheet:
-
ADP8140ACPZ-2-R7.pdf
- Description:
- IC LED DRV LIN PWM 500MA 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:757
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Product details
Overview
ADP8140ACPZ-2-R7 from Analog Devices is a 4-channel high-current LED driver IC with programmable current sinks (125 μA to 500 mA per channel), analog/PWM dimming support, and feedback-controlled external power stage regulation. It operates from 3 V to 30 V input, supports up to 100 V LED anode supply, and delivers ≤2% channel-to-channel current matching - used in large-format LED backlighting and high-brightness lighting systems.
For engineers reviewing the ADP8140ACPZ-2-R7 datasheet, ADP8140ACPZ-2-R7 pinout, ADP8140ACPZ-2-R7 application, or ADP8140ACPZ-2-R7 equivalent, key selection considerations include its LFCSP-16 package thermal performance (θJA = 33.2°C/W), dual-mode power control (error amplifier or low-gain buffer), integrated fault protection (LED open/short, overtemperature, overvoltage), and ISET-programmed current accuracy (±5% at 350 mA).
Technical Context
The ADP8140ACPZ-2-R7 implements four matched current sinks controlled by a single external resistor (ISET), with headroom voltage as low as 210 mV at 350 mA. Its MODE pin selects between error amplifier (EA) or low-gain buffer operation, determining whether COMP outputs transconductance-controlled voltage or scaled sink-minimum voltage for SMPS feedback.
Feedback is delivered via FB_OUT (sink current output) and COMP (dual-function compensation pin), enabling secondary-side control of isolated supplies or direct FB-input interfacing with buck/boost controllers. Fault detection includes per-channel overvoltage (5.7 V threshold), open-circuit (80 mV SINKx threshold), and thermal foldback (135°C) with dedicated AFAULTEA output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED Current Range | 125 μA to 500 mA per channel, set by single ISET resistor - enables uniform brightness scaling across 4 strings without per-channel trimming. |
| Current Matching | ≤2% max mismatch at 500 mA - ensures consistent luminance in multi-string backlighting without optical compensation. | Current Accuracy | ±5% max over −40°C to +125°C - guarantees stable LED flux under industrial temperature extremes. |
| Input Voltage Range | 3.0 V to 30 V VIN - supports wide-input industrial and automotive LED power rails. |
| LED Anode Voltage Support | Up to 100 V dc - allows use with high-VF LED arrays or series-connected strings without external level-shifting. |
| Thermal Protection | Foldback at 135°C, shutdown at 150°C with 20°C hysteresis - prevents thermal runaway during sustained high-power operation. |
| Package Thermal Resistance | θJA = 33.2°C/W (LFCSP-16 with exposed pad soldered to GND) - enables >1.5 W continuous dissipation in standard PCB layouts. |
Pinout & Package
ADP8140ACPZ-2-R7 is housed in a 4 mm × 4 mm, 16-lead lead frame chip scale package (LFCSP) with exposed thermal pad (EPAD) connected to GND. The package is thermally enhanced for high-current LED driving applications and requires soldering of the EPAD to a ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Supply input | 3.0–30 V main power rail; powers internal circuitry and REG output. |
| REG | Regulated 3.0 V source | Provides stable bias for external components; requires ≥1.0 μF capacitor to GND. |
| MODE | Operation mode selector | Configures EA vs. buffer mode at power-up; read once when VIN exceeds UVLO (2.95 V). |
| EN | Enable control | Active-high logic input (VIH = 1.1 V); internal 400 kΩ pull-down ensures safe default-off state. |
| AFAULTEA | Fault indicator output | Open-drain active-low signal; must be externally pulled up; paralleled across multiple ADP8140s. |
| FB_OUT | Feedback output | Sink-current output (0.04–15 mA) for controlling external power stage; behavior depends on MODE setting. |
| COMP | Compensation node | Dual-function pin: EA output (transconductance) or buffered sink-minimum voltage (3.9× gain) - connects to SMPS FB or optocoupler. |
| ISET | Current programming | Resistor-to-GND sets all four sink currents; open = 15 mA default, shorted = 570 mA clamp. |
| VO_SNS | Overvoltage sense input | Monitors LED string voltage via resistor divider; disables OVP if tied to GND. |
| SINK1–SINK4 | LED current sinks | Four independent NMOS sinks; each rated for ≤20 V max voltage, ≤500 mA current. |
| DIM | Analog dimming input | Scales LED current linearly (0–100%) when MODE = GND; supports 0.14–40 kHz PWM when MODE = REG. |
| VT | Voltage threshold / PWM input | Dual-role: analog current reduction (if MIN < 2.2 V) or PWM pulsing (if MIN = REG); 1.9–2.1 V = full-scale. |
| MIN | Minimum threshold reference | Defines VT's analog cutoff or enables PWM mode; voltage at startup determines VT function. |
| EPAD (GND) | Thermal & electrical ground | Exposed pad must be soldered to PCB ground plane for thermal conduction and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated error amplifier | Enables secondary-side control of isolated flyback/forward supplies without optocoupler latency or aging drift. |
| Multiple IC parallel operation | Supports synchronized control of >4 LED strings or higher-current strings (e.g., 2 sinks combined = 1 A per string). |
| Robust fault protection suite | Covers LED open-circuit (80 mV SINKx threshold), short-circuit (525 mV), overtemperature (135°C foldback), and overvoltage (5.7 V per channel). |
| Adaptable power control modes | Four MODE-configurable options: EA (for optocoupler/PMOS), low-gain buffer (for buck/boost FB inputs), supporting diverse power architectures. |
| Thermally enhanced LFCSP | 4 mm × 4 mm footprint with exposed pad achieves θJA = 33.2°C/W - reduces heatsinking requirements in space-constrained lighting modules. |
Applications
| Large Format LCD Backlighting | Industrial High-Brightness Lighting |
|---|---|
Use Scenario: Driving 12–24 parallel LED strings in commercial signage or medical display backlights requiring uniform luminance and dimming fidelity. IC Role / Device Role / Timing Role: Four-channel current sink regulating individual string currents while FB_OUT dynamically adjusts DC-DC converter output voltage for constant power efficiency. Use Value: ≤2% channel matching eliminates visible banding; 350 mV headroom enables high-efficiency operation even with aging LEDs. | Use Scenario: Controlling high-power LED arrays in factory floor lighting, warehouse high-bays, or outdoor area lighting where thermal stability and fault resilience are critical. IC Role / Device Role / Timing Role: LED driver with integrated thermal foldback (135°C) and overvoltage protection (5.7 V/channel) safeguarding against ambient heat buildup and LED string failure. Use Value: Standby current of 200 μA extends system uptime during maintenance cycles; 100 V LED anode support simplifies architecture for multi-series arrays. |
| Automotive Interior Lighting | Architectural Accent Lighting |
Use Scenario: Dimmable cabin lighting (footwells, door panels, ambient strips) requiring smooth 0–100% analog dimming and EMI-robust PWM control. IC Role / Device Role / Timing Role: Dual-dimming interface (DIM pin for analog, VT+MIN for PWM) provides flexible integration with vehicle microcontrollers or LIN bus drivers. Use Value: DIM pin supports 0.14–40 kHz PWM frequency range; VT scaling achieves <10% dimming linearity error across temperature. | Use Scenario: RGBW tunable fixtures in hospitality or retail environments needing precise current control per color channel and coordinated fault reporting. IC Role / Device Role / Timing Role: Four independent sinks assigned to R/G/B/W channels; AFAULTEA output wired in OR configuration for centralized fault monitoring. Use Value: ±5% current accuracy ensures repeatable white point; open-circuit detection (80 mV threshold) isolates failed LEDs without disrupting adjacent channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409QMY/NOPB | Single-channel buck LED controller; no integrated current sinks; requires external MOSFET and sense resistor. | Best suited for high-efficiency, high-power single-string designs where board space permits discrete FET layout. | Select LM3409QMY/NOPB when designing cost-optimized single-string systems with >1 A current and need for adjustable switching frequency. |
| TPS61165DRVR | Single-channel boost LED driver with integrated 1.2 A switch; fixed 1.2 MHz switching; no multi-channel matching or FB_OUT feedback control. | Ideal for portable battery-powered LED flash or indicator applications with limited input voltage range (2.7–6 V). | Choose TPS61165DRVR for compact, low-voltage battery-fed designs where 4-channel synchronization and external power stage control are unnecessary. |
Compared with LM3409QMY/NOPB and TPS61165DRVR, the ADP8140ACPZ-2-R7 uniquely integrates four precision-matched current sinks with programmable feedback output (FB_OUT) for external power stage optimization - making it the only option supporting multi-string backlighting with unified thermal management and fault coordination.
Availability
ADP8140ACPZ-2-R7 is available at Aetrix Electronics and suitable for large format LCD backlighting, industrial high-brightness lighting, and automotive interior lighting requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADP8140ACPZ-2-R7 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 industrial, automotive, communications, and healthcare markets.
The ADP8140ACPZ-2-R7 belongs to Analog Devices' high-current LED driver product line, designed specifically for precision multi-string backlighting and architectural lighting systems demanding tight current matching, robust fault handling, and adaptive power stage control.
FAQ
What is the maximum LED string voltage supported by the ADP8140ACPZ-2-R7?
The ADP8140ACPZ-2-R7 supports LED anode supply voltages up to 100 V dc. While each SINKx pin is rated for ≤20 V, the device controls an external power stage via FB_OUT and COMP, allowing the overall LED string voltage to exceed 20 V - provided the external supply regulates accordingly. This architecture decouples sink voltage limits from total string voltage capability.
How does the MODE pin affect dimming functionality in the ADP8140ACPZ-2-R7?
The MODE pin configures both power control and dimming behavior in the ADP8140ACPZ-2-R7. When MODE = GND, the DIM pin accepts analog voltage (0–2.1 V) for linear current scaling. When MODE = REG, DIM accepts PWM signals (0.14–40 kHz). VT pin functionality similarly shifts between analog scaling and PWM pulsing based on MIN pin voltage at startup - all determined solely at power-up.
Can multiple ADP8140ACPZ-2-R7 ICs be synchronized for larger LED arrays?
Yes, multiple ADP8140ACPZ-2-R7 ICs can operate in parallel to drive larger LED arrays. All AFAULTEA pins must be wired together with a shared pull-up resistor, and EN pins should be tied to ensure simultaneous enable/disable. The FB_OUT and COMP outputs coordinate external power stage control across devices, maintaining uniform current regulation and fault response without master-slave timing circuitry.
What happens if the ISET pin is left unconnected on the ADP8140ACPZ-2-R7?
If the ISET pin is left floating, the ADP8140ACPZ-2-R7 defaults to a typical sink current of 15 mA per channel. This safe-start condition prevents overcurrent during prototyping or miswiring. For production designs, a resistor must be connected to ISET to achieve target current - e.g., 7.32 kΩ yields 350 mA, per the datasheet equation RSET = 2560 / ISINK (in mA).
Does the ADP8140ACPZ-2-R7 provide protection against LED open-circuit faults?
Yes, the ADP8140ACPZ-2-R7 detects LED open-circuit faults per channel using SINKx pin voltage monitoring. If a SINKx voltage rises above 80 mV (VSFD_OPEN threshold), that channel is removed from the feedback loop to prevent regulation instability. Concurrently, AFAULTEA asserts low, signaling system-level fault condition - enabling rapid diagnostics and graceful degradation in multi-string systems.
ADP8140ACPZ-2-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 30V
- Voltage - Output:
- -
- Current - Output / Channel:
- 500mA
- Frequency:
- -
- Dimming:
- Analog, PWM
- Applications:
- Backlight, Lighting
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LFCSP-WD (4x4)
ADP8140ACPZ-2-R7 FAQ
1.How can I place an order for ADP8140ACPZ-2-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP8140ACPZ-2-R7 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 ADP8140ACPZ-2-R7 reliable?
The price and inventory of ADP8140ACPZ-2-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP8140ACPZ-2-R7 is usually 5 days.
3.What payment methods are accepted for ADP8140ACPZ-2-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP8140ACPZ-2-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP8140ACPZ-2-R7?
ADP8140ACPZ-2-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP8140ACPZ-2-R7 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 ADP8140ACPZ-2-R7?
For technical support, including ADP8140ACPZ-2-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP8140ACPZ-2-R7 requirements.
6.How does Aetrix verify that ADP8140ACPZ-2-R7 is sourced from the original manufacturer or authorized distributors?
All ADP8140ACPZ-2-R7 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 ADP8140ACPZ-2-R7 meets industry standards.
7.What is the process for return or replacement of ADP8140ACPZ-2-R7?
All ADP8140ACPZ-2-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP8140ACPZ-2-R7, 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 ADP8140ACPZ-2-R7 part is unused and in its original packaging.
Return procedure for ADP8140ACPZ-2-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADP8140ACPZ-2-R7 Tags
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