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NXP Semiconductors PCA9626BS,518
- Part No.:
- PCA9626BS,518
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
PCA9626BS,518.pdf
- Description:
- IC LED DRV LIN PWM 100MA 48HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,511
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Product details
Overview
PCA9626BS,518 from NXP Semiconductors is a 24-bit I²C-bus LED driver with 24 open-drain outputs sinking up to 100 mA each at up to 40 V, featuring dual PWM control (97 kHz individual + 190 Hz/24 Hz–10.73 s group), 8-bit brightness resolution per channel, and hardware OE pin for synchronized blinking-used in RGB/RGBA status indicators and keypad backlights.
For engineers reviewing the PCA9626BS,518 datasheet, PCA9626BS,518 pinout, PCA9626BS,518 application, or PCA9626BS,518 equivalent, key selection criteria include its Fm+ I²C interface (1 MHz, 30 mA SDA drive), 24-channel independent dimming, Chase Byte pattern engine for marquee effects, and LQFP48 package compatibility with industrial temperature range (−40 °C to +85 °C).
Technical Context
The PCA9626BS,518 integrates a 25 MHz internal oscillator (no external components required) and supports three I²C addressing modes: individual (7 hardware address pins → 126 devices), LED Group Call (E0h default), and three programmable Sub Call addresses (E2h/E4h/E8h). Its register map includes 24 individual PWM registers (02h–19h), GRPPWM/GRPFREQ for group control, and CHASE register for predefined ON/OFF sequences.
Output behavior is configured via LEDOUTx registers (1Dh–22h), supporting four states per channel: OFF, ON (no PWM), individual PWM only, or combined individual + group PWM. The active-low OE pin enables hardware-synchronized blinking across multiple devices without software intervention, and output state update timing is configurable to occur on ACK or STOP command.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Interface | Fm+ compatible: 1 MHz max clock, 30 mA SDA drive strength for >4000 pF bus loading |
| LED Outputs | 24 open-drain channels; each sinks 0–100 mA, tolerant to 40 V off-state voltage |
| Individual PWM | 97 kHz fixed frequency; 256-step (8-bit) linear duty cycle control (0 % to 99.6 %) |
| Group PWM | 190 Hz fixed dimming OR programmable blink frequency (24 Hz to 10.73 s period); 256-step duty cycle |
| Supply Range | VDD = 2.3 V to 5.5 V; non-LED pins tolerate up to 5.5 V; −40 °C to +85 °C operation |
| Chase Control | CHASE register (1Ch) selects 24 predefined LED ON/OFF patterns (e.g., marquee, half-chase, LTR sequences) |
| Addressing | 7 hardware address pins (126 unique IDs); 1 All Call (E0h) + 3 Sub Call (E2h/E4h/E8h) software addresses |
Pinout & Package
LQFP48 package (7 mm × 7 mm × 1.4 mm body, SOT313-2); 48-pin quad flat with exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LED0–LED23 (pins 2–5, 8–11, 17–20, 26–29, 32–35, 41–44) | Open-drain LED sink output | Each drives one LED cathode; 100 mA max sink current, 40 V max off-state voltage |
| A0–A6 (pins 46, 47, 13, 14, 15, 22, 23) | Hardware I²C slave address input | 7-bit address selection; externally pulled HIGH/LOW to configure one of 126 device addresses |
| SCL / SDA (pins 38, 39) | I²C serial clock/data bidirectional | Fm+ interface: 1 MHz operation; SDA has 30 mA drive capability for high-capacitance buses |
| OE (pin 24) | Active-low output enable | Hardware blink/dim control: ties all LED outputs together; overrides PWM settings when asserted |
| VDD (pin 40) / VSS (pins 1,6,7,12,16,21,25,30,31,36,37,45,48) | Power supply and ground | VDD = 2.3–5.5 V; 13 dedicated VSS pins ensure low-impedance return paths for 24 high-current outputs |
Key Features
| Feature | Design Value |
|---|---|
| Chase Byte pattern engine | Reduces I²C traffic for repetitive LED sequences (e.g., marquee chase) by selecting preloaded 24-bit ON/OFF masks via single CHASE register write |
| Configurable output update timing | Outputs change on STOP (default) or ACK command-enables synchronized multi-device updates or byte-by-byte brightness adjustment |
| Software Reset (SWRST) | I²C-callable reset (address 06h) that restores all registers to POR defaults-identical behavior to power-on reset, no hardware reset pin needed |
| Noise-immune I²C interface | Integrated noise filters on SCL/SDA inputs; 5.5 V-tolerant non-LED pins; ESD rated >2000 V HBM / >1000 V CDM |
| Low-power operation | SLEEP bit (MODE1[4]) disables 25 MHz oscillator; standby current minimized while preserving register contents |
Applications
| RGB Status Indicators | Keypad Backlighting |
|---|---|
|
Use Scenario: Multi-color status feedback on industrial HMIs or telecom equipment front panels using discrete red/green/blue LEDs. IC Role / Device Role / Timing Role: PCA9626BS,518 independently controls brightness and blink timing of 24 RGBA LEDs via I²C, enabling color mixing and dynamic alerts. Use Value: Eliminates microcontroller GPIO overhead and external PWM timers; 97 kHz individual PWM prevents visible flicker even at low brightness levels. |
Use Scenario: Uniform backlighting for membrane keypads in handheld medical devices requiring low EMI and consistent luminance across 20+ keys. IC Role / Device Role / Timing Role: PCA9626BS,518 drives all keypad LEDs in group-blink mode (190 Hz) while maintaining individual dimming granularity for adaptive brightness control. Use Value: Hardware OE pin allows synchronized blink across multiple PCA9626BS,518 devices-critical for coordinated UI feedback without CPU polling. |
| LED Display Modules | LCD Backlight Control |
|
Use Scenario: Dot-matrix LED displays in point-of-sale terminals where animated text scrolling (marquee effect) must run autonomously. IC Role / Device Role / Timing Role: PCA9626BS,518 executes preprogrammed Chase Byte sequences (e.g., LTR_0_ON through LTR_20_ON) to shift illumination left-to-right across 24 segments. Use Value: Reduces host MCU I²C bandwidth usage by >90 % compared to sequential register writes-enables smooth animation at 30+ fps. |
Use Scenario: Edge-lit LCD backlight for ruggedized test equipment needing adjustable white-point tuning and flicker-free dimming. IC Role / Device Role / Timing Role: PCA9626BS,518 drives parallel strings of white LEDs with individual PWM fine-tuning per string to compensate for forward voltage variation. Use Value: 24-channel independence allows per-string current matching; 40 V output tolerance supports series-connected LED strings without external boost circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9635DP,118 | Same 24-channel architecture but higher 150 mA per output; lacks Chase Byte feature; uses different register map and no GRPFREQ programmability | Better suited for high-current LED strings (e.g., automotive interior lighting); not drop-in for marquee-pattern applications requiring CHASE register | Select PCA9635DP,118 only when >100 mA/channel drive or higher voltage compliance (>40 V) is required; verify register-level firmware changes |
| TLC5947IPWPR | 24-channel, 12-bit PWM (4096 steps), 120 mA/channel, SPI interface only; no I²C, no group blink, no hardware OE pin | Preferred for precision dimming (e.g., studio lighting) where resolution >8-bit matters; incompatible with I²C-based systems or synchronized hardware blink | Choose TLC5947IPWPR when 12-bit linearity and SPI integration outweigh loss of I²C flexibility and Chase pattern acceleration |
Compared with PCA9635DP,118 and TLC5947IPWPR, the PCA9626BS,518 uniquely balances I²C efficiency, hardware-synchronized blink, and pattern acceleration via Chase Byte-making it optimal for cost-sensitive, animation-rich UIs where 8-bit resolution and 100 mA drive suffice.
Availability
PCA9626BS,518 is available at Aetrix Electronics and suitable for RGB status indicators, keypad backlights, and LED display modules requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for PCA9626BS,518 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in mixed-signal IC design and embedded processing.
The PCA9626BS,518 belongs to NXP's Fm+ I²C LED driver family, engineered specifically for high-density, low-software-overhead LED control in space-constrained human-interface applications.
FAQ
What is the maximum number of PCA9626BS,518 devices supported on a single I²C bus?
The PCA9626BS,518 supports up to 126 devices on one I²C bus using its 7 hardware address pins (A0–A6). Two reserved addresses (Software Reset and LED All Call) reduce the usable count from 128 to 126. Additional addressing via LED Sub Call registers (E2h/E4h/E8h) enables grouped commands but does not increase the total number of individually addressable units. PCA9626BS,518 requires external pull-up resistors on address pins since no internal ones are provided.
Does the PCA9626BS,518 require an external crystal or resonator?
No, the PCA9626BS,518 contains a fully integrated 25 MHz internal oscillator that requires no external components. This oscillator drives both the 97 kHz individual PWM and 190 Hz group PWM generators, as well as the I²C timing logic. The SLEEP bit in MODE1 register can disable the oscillator to reduce standby current, and it takes ≤500 µs to stabilize after waking.
How does the Chase Byte feature reduce I²C traffic in marquee applications?
The Chase Byte (written to CHASE register 1Ch) selects one of 24 predefined LED ON/OFF patterns (e.g., LTR_0_ON through LTR_20_ON) stored in internal ROM. Instead of sending 24 separate PWM register writes to shift illumination, a single CHASE register write triggers the full sequence-cutting I²C commands by >95 % and enabling smooth 30+ fps animation. PCA9626BS,518 updates the CHASE register on ACK, ensuring deterministic timing.
Can the PCA9626BS,518 drive LEDs with forward voltages exceeding 5.5 V?
Yes-the PCA9626BS,518's 24 open-drain outputs are rated for up to 40 V off-state voltage, allowing direct connection to LED strings with combined forward voltages up to 40 V (e.g., 10× white LEDs @ 3.8 V each). The VDD supply (2.3–5.5 V) powers only the logic core; LED current is sourced externally from a separate rail tied to the LED anodes. PCA9626BS,518 sinks current only-no high-side drive capability.
What happens to LED outputs during a Software Reset (SWRST) command?
Executing the SWRST command (I²C address 06h, R/W = 0) resets all internal registers-including PWM0–PWM23, GRPPWM, GRPFREQ, CHASE, and MODE1/MODE2-to their power-on default values. This forces all LED outputs to OFF (since PWM registers default to 00h and LEDOUTx defaults disable PWM), identical to a hardware power-on reset. PCA9626BS,518 acknowledges only the SWRST address with R/W = 0; R/W = 1 is ignored.
PCA9626BS,518 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 24
- Voltage - Supply (Min):
- 2.3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 40V
- Current - Output / Channel:
- 100mA
- Frequency:
- 100kHz ~ 1MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-HVQFN (6x6)
PCA9626BS,518 FAQ
1.How can I place an order for PCA9626BS,518 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9626BS,518 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 PCA9626BS,518 reliable?
The price and inventory of PCA9626BS,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9626BS,518 is usually 5 days.
3.What payment methods are accepted for PCA9626BS,518?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9626BS,518 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9626BS,518?
PCA9626BS,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9626BS,518 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 PCA9626BS,518?
For technical support, including PCA9626BS,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9626BS,518 requirements.
6.How does Aetrix verify that PCA9626BS,518 is sourced from the original manufacturer or authorized distributors?
All PCA9626BS,518 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 PCA9626BS,518 meets industry standards.
7.What is the process for return or replacement of PCA9626BS,518?
All PCA9626BS,518 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9626BS,518, 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 PCA9626BS,518 part is unused and in its original packaging.
Return procedure for PCA9626BS,518:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCA9626BS,518 Tags
-
BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
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