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Analog Devices Inc. ADP8140ACPZ-1-R7
- Part No.:
- ADP8140ACPZ-1-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 16-WFDFN Exposed Pad, CSP
- Datasheet:
-
ADP8140ACPZ-1-R7.pdf
- Description:
- IC LED DRV LIN PWM 500MA 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,401
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Product details
Overview
ADP8140ACPZ-1-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 integrated feedback control for external power stages. 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 requiring precise multi-string regulation.
For engineers reviewing the ADP8140ACPZ-1-R7 datasheet, ADP8140ACPZ-1-R7 pinout, ADP8140ACPZ-1-R7 application, or ADP8140ACPZ-1-R7 equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply-chain support details specific to the ADP8140ACPZ-1-R7 LFCSP package.
Technical Context
The ADP8140ACPZ-1-R7 implements a four-channel current-sink architecture with single-resistor (ISET) programming, where all channels share identical sink current set by RSET per Equation 1 (ISINK = 2560 / RSET). Its dual-mode power control-selectable via MODE pin-supports error amplifier (EA) operation for isolated supplies or low-gain buffer mode for direct SMPS FB-loop integration.
It integrates robust fault protection including LED open-circuit detection (SINKx < 80 mV), short-circuit response (SINKx > 525 mV), channel overvoltage clamp (5.7 V threshold), thermal foldback (135°C), and shutdown (150°C). The FB_OUT pin delivers transconductance-controlled current (12.5–22 m℧) to regulate external power sources, while COMP serves as EA output or buffered scaled minimum SINK voltage depending on MODE configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED Current Range | 125 μA to 500 mA per channel, set by single ISET resistor - enables scalable brightness tuning across wide dynamic range without per-channel components. |
| Current Matching | ≤2% max mismatch at 500 mA - ensures uniform luminance across 4 LED strings in backlight or architectural lighting arrays. | Input Voltage Range | 3.0 V to 30 V VIN - supports 12 V/24 V industrial rails and higher with external Zener clamping. |
| LED Anode Voltage Support | Up to 100 V DC - allows use with high-VF LED stacks or long-series configurations without internal voltage stress. |
| Feedback Output (FB_OUT) | Transconductance 12.5–22 m℧ with 450 mV EA reference - directly interfaces optocouplers or PMOS regulators for secondary-side control. |
| 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 (16-lead LFCSP, 4 mm × 4 mm) - requires exposed pad soldered to GND plane for reliable 4×500 mA operation. |
Pinout & Package
ADP8140ACPZ-1-R7 uses a 16-lead, 4 mm × 4 mm thermally enhanced LFCSP package with exposed pad (GND). Pin 1 is marked by laser indicator; EPAD must be soldered to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power Input | 3.0–30 V supply input; powers internal circuitry and REG LDO - requires local 10 μF ceramic capacitor. |
| REG (Pin 2) | Regulated Output | 3.0 V ±5% @ 15 mA - powers external bias circuits or MODE/DIM/VT pull-ups; needs ≥1 μF bypass cap. |
| MODE (Pin 3) | Operation Mode Select | Configures power control mode (EA/buffer) and DIM/VT behavior at power-up only - resistor-programmed (GND/30.1k/52.3k/REG). |
| EN (Pin 4) | Enable Control | Active-high enable with 400 kΩ internal pulldown - asserts after UVLO; disables sinks and reduces IQ to 200 μA in standby. |
| AFAULTE (Pin 5) | Fault Indicator | Open-drain active-low fault flag - must use external pull-up; wired-OR for multi-IC parallel operation. |
| FB_OUT (Pin 6) | Feedback Output | EA output current source/sink - drives optocoupler LED or PMOS gate; value reflects required power stage adjustment. |
| COMP (Pin 7) | Compensation Node | EA output (MODE=GND/REG) or buffered min-SINK voltage (MODE=30.1k/52.3k) - connects to SMPS FB or isolation amplifier. |
| ISET (Pin 8) | Current Programming | Resistor-to-GND sets all 4 sink currents; open = 15 mA default, shorted = 570 mA limit + fault shutdown. |
| VO_SNS (Pin 9) | Overvoltage Sense | Monitors LED string top via resistor divider; trips if >1.2 V - disable by connecting to GND. |
| SINK4–SINK1 (Pins 10–13) | LED Current Sinks | Four independent NMOS sinks; each rated for 20 V max drain voltage and 500 mA continuous - connect to LED cathodes. |
| DIM (Pin 14) | Analog Dimming Input | Scales LED current linearly (0–100%) with 0–2.1 V dc or PWM (0.14–40 kHz) - behavior depends on MODE/MIN state. |
| VT (Pin 15) | Voltage Threshold Control | Dual-function: analog current scaling (MIN < 2.2 V) or PWM pulsing (MIN = REG); 0.6–1 μA pull-up enables resistive divider use. |
| MIN (Pin 16) | Minimum Threshold Reference | Sets VT lower bound (2.2–2.4 V threshold) for analog mode or enables PWM mode when tied to REG at startup. |
| EPAD | Thermal/Ground Plane | Exposed pad (GND) - mandatory solder connection to PCB ground pour for thermal dissipation and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| 4-channel current sink integration | Eliminates need for 4 discrete current regulators and matching resistors - reduces BOM count and layout area in multi-string LED systems. |
| Single-resistor current programming | RSET sets identical current across all 4 channels (125 μA–500 mA) - simplifies calibration and avoids per-channel trimming. |
| Dual-mode power stage control | Selectable EA or low-gain buffer output via MODE pin - supports both isolated flyback and non-isolated buck/boost topologies. |
| Comprehensive fault protection suite | Detects and responds to LED open/short, overtemperature (135°C/150°C), overvoltage (5.7 V/channel), and ISET faults - prevents system damage without external supervision. |
| Thermally optimized LFCSP package | 4 mm × 4 mm footprint with exposed pad achieves θJA = 33.2°C/W - enables 2 W+ continuous dissipation with standard 2-layer PCB cooling. |
Applications
| Large Format LCD Backlighting | High-Brightness Architectural Lighting |
|---|---|
|
Use Scenario: Driving 4 parallel LED strings in commercial signage or transportation displays with uniform brightness and dimming. IC Role / Device Role / Timing Role: Acts as precision current sink controller with synchronized analog/PWM dimming and feedback-driven power stage regulation. Use Value: Achieves ≤2% inter-string current mismatch and 5% absolute accuracy - eliminates visible banding or color shift under variable dimming conditions. |
Use Scenario: Powering high-lumen LED modules in outdoor floodlights or facade lighting where thermal management and reliability are critical. IC Role / Device Role / Timing Role: Provides thermal foldback (135°C), overvoltage clamp (5.7 V), and open-circuit detection to sustain operation in harsh ambient environments. Use Value: Enables continuous 500 mA per channel delivery with automatic derating above 135°C - extends LED lifetime and avoids abrupt failure. |
| Industrial Machine Vision Illumination | Medical Endoscopic Light Sources |
|
Use Scenario: Controlling strobed LED arrays in automated inspection systems requiring precise pulse timing and intensity stability. IC Role / Device Role / Timing Role: Uses VT pin PWM mode (with MIN = REG) to generate sub-20 μs rise/fall LED current pulses synchronized to camera triggers. Use Value: Delivers 20 μs PWM delay and tight current matching - ensures repeatable exposure intensity and eliminates motion blur in high-speed imaging. |
Use Scenario: Regulating multiple LED channels in portable surgical headlamps where low-noise, stable current and safety-critical fault reporting are mandatory. IC Role / Device Role / Timing Role: Functions as redundant current sink with AFAULTE wired-OR fault signaling and VO_SNS overvoltage monitoring for patient safety compliance. Use Value: Provides certified open-circuit, short-circuit, and thermal fault responses - meets IEC 60601-1 leakage and fail-safe requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED current sink applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409QMY/NOPB | Single-channel buck LED controller with 1.25 A max; no integrated current sinks - requires external MOSFET and sense resistor. | Best for high-efficiency single-string designs where board space permits discrete FET layout; lacks multi-channel matching. | Choose LM3409QMY/NOPB when optimizing for >95% efficiency in single-string automotive lighting, not multi-string uniformity. |
| TPS61165DRVR | Single-channel boost LED driver with 40 V output; integrated switch but no multi-sink architecture or FB_OUT interface. | Suitable for low-input-voltage battery-powered LED flashlights; cannot replace ADP8140ACPZ-1-R7's 4-channel sink + external power control. | Choose TPS61165DRVR for portable 1-cell Li-ion LED torches needing compact boost topology, not fixed-voltage multi-string backlighting. |
Compared with LM3409QMY/NOPB and TPS61165DRVR, the ADP8140ACPZ-1-R7 uniquely combines 4 matched current sinks, external power stage control via FB_OUT/COMP, and comprehensive fault coverage - making it irreplaceable for large-area, high-reliability LED systems requiring channel uniformity and system-level protection.
Availability
ADP8140ACPZ-1-R7 is available at Aetrix Electronics and suitable for large-format LCD backlighting, high-brightness architectural lighting, and industrial machine vision illumination requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADP8140ACPZ-1-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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and power management.
The ADP8140ACPZ-1-R7 belongs to Analog Devices' LED driver product line, engineered specifically for high-current, multi-string LED systems demanding tight current matching, flexible dimming, and robust system-level protection in industrial and commercial lighting.
FAQ
What is the maximum LED string voltage supported by the ADP8140ACPZ-1-R7?
The ADP8140ACPZ-1-R7 itself does not drive the LED string voltage directly - it sinks current from the cathode side. Its SINKx pins tolerate up to 21 V, but the IC is designed to operate with LED anode supplies up to 100 V DC when paired with an external power stage (e.g., buck, boost, or flyback) controlled via FB_OUT and COMP. This architecture decouples current regulation from voltage handling, enabling safe use with high-VF LED arrays.
How does the MODE pin affect dimming behavior in the ADP8140ACPZ-1-R7?
The MODE pin configures both power control mode and dimming input interpretation at power-up. When MODE = GND, DIM accepts analog voltage (0–2.1 V) for linear current scaling. When MODE = REG, DIM accepts PWM signals (0.14–40 kHz) for digital dimming. With MODE = 30.1 kΩ or 52.3 kΩ to GND, VT (not DIM) becomes the PWM input. This ensures correct dimming signal routing based on the selected power stage interface.
Can multiple ADP8140ACPZ-1-R7 ICs be synchronized for coherent dimming across more than four LED strings?
Yes - multiple ADP8140ACPZ-1-R7 ICs can be operated in parallel using shared DIM and VT inputs, with AFAULTE pins wired together for collective fault reporting. The datasheet confirms synchronized start-up and matching performance across devices when powered from the same VIN and controlled by common analog/PWM signals. No additional synchronization circuitry is required.
What happens if the ISET pin is left unconnected on the ADP8140ACPZ-1-R7?
If the ISET pin is left floating, the ADP8140ACPZ-1-R7 defaults to a nominal sink current of 15 mA per channel (guaranteed 15–17 mA). This safe-start condition prevents overcurrent during prototyping or miswiring. To achieve precise current levels (e.g., 350 mA), a resistor must be connected from ISET to GND per the formula ISINK = 2560 / RSET (kΩ).
Does the ADP8140ACPZ-1-R7 support thermal derating, and how is it implemented?
Yes - the ADP8140ACPZ-1-R7 implements internal thermal foldback starting at 135°C junction temperature, reducing LED current to prevent overheating. If temperature reaches 150°C, it triggers full thermal shutdown with 20°C hysteresis. This behavior is automatic and requires no external circuitry; thermal performance depends on proper EPAD grounding and PCB copper area per the datasheet layout guidelines.
ADP8140ACPZ-1-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-1-R7 FAQ
1.How can I place an order for ADP8140ACPZ-1-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP8140ACPZ-1-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-1-R7 reliable?
The price and inventory of ADP8140ACPZ-1-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-1-R7 is usually 5 days.
3.What payment methods are accepted for ADP8140ACPZ-1-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP8140ACPZ-1-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP8140ACPZ-1-R7?
ADP8140ACPZ-1-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP8140ACPZ-1-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-1-R7?
For technical support, including ADP8140ACPZ-1-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP8140ACPZ-1-R7 requirements.
6.How does Aetrix verify that ADP8140ACPZ-1-R7 is sourced from the original manufacturer or authorized distributors?
All ADP8140ACPZ-1-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-1-R7 meets industry standards.
7.What is the process for return or replacement of ADP8140ACPZ-1-R7?
All ADP8140ACPZ-1-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP8140ACPZ-1-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-1-R7 part is unused and in its original packaging.
Return procedure for ADP8140ACPZ-1-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADP8140ACPZ-1-R7 Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
Power Integrations
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HV9910CLG-G
Microchip Technology
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CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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