My Inquiry
My Account
Analog Devices Inc. ADD5211ACPZ-R7
- Part No.:
- ADD5211ACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 24-WFQFN Exposed Pad, CSP
- Datasheet:
-
ADD5211ACPZ-R7.pdf
- Description:
- IC LED DRVR CTRLR PWM 24LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,126
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADD5211ACPZ-R7 from Analog Devices is a four-string white LED driver IC for LCD backlight systems, featuring inductive boost control, 4.5 V to 40 V input range, adjustable 200 kHz–1.2 MHz switching frequency, 40 mA–200 mA per-string current regulation, and PWM dimming up to 25 kHz. It integrates internal MOSFET drivers and supports headroom-controlled efficiency optimization in monitor/TV backlight designs.
For engineers reviewing the ADD5211ACPZ-R7 datasheet, ADD5211ACPZ-R7 pinout, ADD5211ACPZ-R7 application, or ADD5211ACPZ-R7 equivalent, key selection considerations include string-to-string current matching (±2.5% max), open-drain fault signaling, LED short/open protection thresholds, thermal shutdown at 150°C, and LFCSP-24 package layout requirements for high-current switching paths.
Technical Context
The ADD5211ACPZ-R7 implements a current-mode, fixed-frequency boost controller with programmable soft start and adaptive output voltage regulation. Its four independent current sinks use dynamic headroom control-monitoring FB1–FB4 voltages-to minimize power dissipation while maintaining uniform brightness across LED strings.
It integrates dual linear regulators (3.3 V VDD for logic, 5.1 V VDR for gate drivers), cycle-by-cycle current limiting, slope compensation, and fault detection circuitry including LED open/short, OVP, SCP, and thermal shutdown-all coordinated via an internal control logic block with POR and UVLO.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 40 V - supports wide-range industrial and automotive DC supplies without external pre-regulation. |
| LED Current per String | 40 mA to 200 mA - set by external ISET resistor; enables flexible brightness and thermal design across 1–4 strings. |
| Switching Frequency | 200 kHz to 1.2 MHz - adjustable via FREQ pin resistor; allows EMI optimization and inductor size trade-offs. |
| String-to-String Tolerance | ±2.5% max at 100 mA - ensures uniform luminance in multi-string LCD backlights without external calibration. |
| Thermal Shutdown Threshold | 150°C (typical) - protects die during sustained overloads; hysteresis of 25°C enables automatic recovery. |
| PWM Dimming Frequency | Up to 25 kHz - eliminates audible noise; 1000:1 contrast ratio achievable at 300 Hz. |
| Package Thermal Resistance | θJA = 40.5°C/W - requires exposed pad soldered to PCB ground plane for reliable operation at full load. |
Pinout & Package
ADD5211ACPZ-R7 uses a 24-lead, 4 mm × 4 mm LFCSP package with exposed thermal pad (EP) requiring connection to AGND/LGND/PGND for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Primary supply input (4.5–40 V); bypassed to AGND with 0.1 µF capacitor for stability. |
| FB1–FB4 | Current Sink Feedback | Regulated cathode nodes for up to four LED strings; unused pins must be tied to LGND. |
| GATE_P / GATE_N | MOSFET Driver Outputs | High-side and low-side gate drive outputs for external N-channel MOSFET; RDS(on) = 5.8 Ω / 2.4 Ω. |
| PWM | Brightness Control Input | Digital dimming interface; 0.8 V/2.2 V logic thresholds; 1.6 µs turn-on delay enables precise timing. |
| FAULT | Open-Drain Fault Indicator | Active-low signal indicating LED open/short, OVP, SCP, or thermal fault; sinks up to 100 Ω load. |
| ISET | Current Programming Input | Resistor-to-ground sets full-scale LED current (ILED = 1500/RSET[kΩ] mA). |
| FREQ | Frequency Select | Resistor-to-AGND sets switching frequency; 50 kΩ yields ~320 kHz typical. |
| SS | Soft Start Control | Capacitor-to-ground controls startup ramp; 27 nF yields negligible inrush current. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Output Voltage Regulation | Minimizes power loss by dynamically adjusting boost output to match minimum required headroom across active strings. |
| Integrated Dual Linear Regulators | VDD (3.3 V) powers internal logic; VDR (5.1 V) drives external MOSFET gates-both require local 1 µF bypassing. |
| Programmable LED Short Protection | LSD pin sets threshold (10× LSD voltage); disable by tying LSD to VDD-prevents false triggers in high-voltage strings. |
| Four Independent Fault-Detected Strings | Each FBx pin monitored for open (<100 mV) or short (>10× VLSD); faulty string disabled while others remain operational. |
| Headroom-Controlled Efficiency | Reduces average power dissipation in current sinks by >30% vs. fixed-headroom designs under variable LED forward voltage conditions. |
Applications
| Monitor Backlight | Industrial Display |
|---|---|
Use Scenario: 24-inch LCD monitor with 4 parallel LED strings (12 LEDs/string) driven from 12 V rail. IC Role / Device Role / Timing Role: Four-string current regulator with adaptive boost output and PWM dimming interface. Use Value: Maintains ±2.5% string current matching across temperature, enabling consistent brightness and color uniformity without optical feedback. |
Use Scenario: Ruggedized HMI panel operating in −40°C to +85°C ambient with 27 V nominal input. IC Role / Device Role / Timing Role: High-input-voltage LED driver with UVLO programming and thermal fault reporting. Use Value: Wide 4.5–40 V input range accommodates battery+capacitor hold-up; thermal shutdown prevents field failures in sealed enclosures. |
| TV Backlight | Medical Imaging Display |
Use Scenario: 55-inch UHD TV backlight using 16-string architecture (grouped into four ADD5211ACPZ-R7 channels). IC Role / Device Role / Timing Role: Primary current sink controller with 25 kHz PWM dimming and open-drain FAULT signaling to system MCU. Use Value: 1000:1 dimming ratio at 300 Hz eliminates flicker perception; FAULT pin enables real-time diagnostics and graceful degradation. |
Use Scenario: Diagnostic-grade grayscale display requiring stable luminance and fault logging for FDA compliance. IC Role / Device Role / Timing Role: Precision LED current source with string-level fault isolation and traceable thermal monitoring. Use Value: LED open/short detection per string ensures single-point failure does not compromise display integrity; thermal hysteresis enables safe auto-recovery. |
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-string controller; no integrated current sinks; requires external sense resistors and MOSFETs. | Suitable for custom multi-phase or high-power designs but lacks native 4-string integration. | Select when board space permits discrete layout and higher peak current (>200 mA/string) is needed. |
| TPS61165DRVR | Single-output boost LED driver with integrated 1.2 A switch; no multi-string current regulation or FAULT pin. | Targeted at portable displays with <100 mA total current; lacks string-level protection or headroom control. | Choose only for cost-sensitive, low-channel-count applications where diagnostic capability is non-critical. |
Compared with LM3409QMY/NOPB and TPS61165DRVR, the ADD5211ACPZ-R7 delivers native four-string current matching, per-string fault isolation, and adaptive headroom control-reducing BOM count by eliminating four external current-sense resistors and simplifying thermal management in compact LCD backlight modules.
Availability
ADD5211ACPZ-R7 is available at Aetrix Electronics and suitable for LCD monitor backlighting, industrial HMI panels, and medical imaging displays requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ADD5211ACPZ-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 instrumentation, industrial automation, and power management.
The ADD5211ACPZ-R7 belongs to Analog Devices' LED backlight driver product line, engineered specifically for high-efficiency, multi-string LCD/LED display systems demanding tight current matching, robust fault handling, and wide-input-voltage operation.
FAQ
What is the maximum number of LED strings supported by the ADD5211ACPZ-R7?
The ADD5211ACPZ-R7 supports exactly four independent LED strings via its FB1–FB4 current sink outputs. Each string is regulated individually with programmable current from 40 mA to 200 mA. Unused FBx pins must be connected to LGND; paralleling FBx pins is permitted to reduce headroom voltage and improve efficiency in 1- or 2-string configurations, but the device does not support more than four strings.
How is LED current programmed on the ADD5211ACPZ-R7?
LED current on the ADD5211ACPZ-R7 is set using an external resistor (RSET) connected between the ISET pin and AGND. The relationship is ILED (mA) = 1500 / RSET (kΩ). For example, a 15 kΩ resistor sets 100 mA per string. This resistor value directly determines the reference voltage for all four current sinks, ensuring matched regulation across strings without trimming.
Does the ADD5211ACPZ-R7 support analog dimming in addition to PWM?
No, the ADD5211ACPZ-R7 supports only PWM-based brightness control via the dedicated PWM input pin. It does not implement analog (DC) dimming or current-scaling interfaces. PWM dimming operates up to 25 kHz to avoid audible noise, with 1000:1 contrast ratio achievable at 300 Hz. The device enters shutdown mode if PWM remains low for 50 ms, requiring a full soft-start sequence upon re-enable.
What protection features are integrated into the ADD5211ACPZ-R7?
The ADD5211ACPZ-R7 integrates LED open and short protection per string, boost output overvoltage (OVP) and short-circuit (SCP) protection, thermal shutdown at 150°C, undervoltage lockout (UVLO), and cycle-by-cycle current limiting. Fault conditions pull the open-drain FAULT pin low; each protected event is independently detectable, allowing the host system to identify which string or subsystem triggered the alert.
What is the recommended PCB layout practice for the ADD5211ACPZ-R7's exposed pad?
The exposed pad (EP) of the ADD5211ACPZ-R7 must be soldered to a solid copper ground plane using ≥4 thermal vias (0.3 mm diameter) placed within the pad area. This connection serves both thermal dissipation (θJC = 3.8°C/W) and electrical grounding for AGND, LGND, and PGND. Splitting the ground plane beneath the EP or omitting vias risks thermal runaway and instability in high-current boost operation.
ADD5211ACPZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Controller
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 40V
- Voltage - Output:
- -
- Current - Output / Channel:
- 200mA
- Frequency:
- 200kHz ~ 1.2MHz
- Dimming:
- PWM
- Applications:
- Backlight, Lighting
- Operating Temperature:
- -25°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-LFCSP (4x4)
ADD5211ACPZ-R7 FAQ
1.How can I place an order for ADD5211ACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADD5211ACPZ-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 ADD5211ACPZ-R7 reliable?
The price and inventory of ADD5211ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADD5211ACPZ-R7 is usually 5 days.
3.What payment methods are accepted for ADD5211ACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADD5211ACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADD5211ACPZ-R7?
ADD5211ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADD5211ACPZ-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 ADD5211ACPZ-R7?
For technical support, including ADD5211ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADD5211ACPZ-R7 requirements.
6.How does Aetrix verify that ADD5211ACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADD5211ACPZ-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 ADD5211ACPZ-R7 meets industry standards.
7.What is the process for return or replacement of ADD5211ACPZ-R7?
All ADD5211ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADD5211ACPZ-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 ADD5211ACPZ-R7 part is unused and in its original packaging.
Return procedure for ADD5211ACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADD5211ACPZ-R7 Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
