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NXP Semiconductors PCA9626B,118
- Part No.:
- PCA9626B,118
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 48-LQFP
- Datasheet:
-
PCA9626B,118.pdf
- Description:
- IC LED DRVR LIN PWM 100MA 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,962
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Product details
Overview
PCA9626B,118 from NXP Semiconductors is a 24-bit I²C-bus LED driver with 24 open-drain outputs capable of sinking 100 mA each at up to 40 V, supporting RGBA LED dimming and blinking via dual PWM architecture (97 kHz individual + 190 Hz/24 Hz–10.73 s group). It operates from 2.3 V to 5.5 V and features Fast-mode Plus (1 MHz) I²C interface with 30 mA SDA drive strength.
For engineers reviewing the PCA9626B,118 datasheet, PCA9626B,118 pinout, PCA9626B,118 application, or PCA9626B,118 equivalent, key selection criteria include its 24-channel independent brightness control, hardware OE pin for synchronized blinking, Chase Byte pattern sequencing, 7-pin hardware addressability (126 devices per bus), and LQFP48 package compatibility with high-density LED array designs.
Technical Context
The PCA9626B,118 integrates a 25 MHz internal oscillator (no external components required) and supports three I²C addressing modes: individual (via A0–A6 pins), LED Group Call (E0h), and three programmable Sub Call addresses (E2h/E4h/E8h). Its register map includes 24 individual PWM registers (02h–19h), GRPPWM (1Ah), GRPFREQ (1Bh), CHASE (1Ch), and LEDOUT state registers (1Dh–26h).
Control logic enables simultaneous or sequential register writes using Auto-Increment (AIF + AI1/AI0), with four rollover modes defined in MODE1. Output behavior is determined by LEDOUTx register bits (LDRx = 00/01/10/11), selecting OFF, ON, individual PWM, or combined individual + group PWM operation - all updated on STOP or ACK per MODE2.OCH bit setting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Interface | Fm+ compliant, 1 MHz max clock rate; 30 mA SDA drive supports ≥4000 pF bus capacitance. |
| LED Outputs | 24 open-drain channels; each sinks 0–100 mA; 40 V off-state voltage tolerance. |
| Individual PWM | 97 kHz fixed frequency; 256-step (0–99.6%) linear duty cycle per channel (PWM0–PWM23). |
| Group PWM | 190 Hz fixed or 24 Hz–10.73 s programmable frequency; 256-step group duty cycle (GRPPWM/GRPFREQ). |
| Supply Range | VDD = 2.3 V to 5.5 V; inputs tolerant to 5.5 V; operating temperature −40 °C to +85 °C. |
| Addressing | 7 hardware address pins (126 unique addresses); 1 All Call (E0h) + 3 Sub Call (E2h/E4h/E8h) software addresses. |
| Chase Control | CHASE register (1Ch) selects predefined 24-bit ON/OFF patterns (e.g., marquee, half-chase, LTR sequences) with ACK-triggered update. |
Pinout & Package
LQFP48 package (7 mm × 7 mm × 1.4 mm, SOT313-2); thermally enhanced exposed pad; lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LED0–LED23 | Open-drain LED driver outputs | 24 dedicated sink outputs; each drives one LED cathode; 100 mA max per pin; 40 V max off-state voltage. |
| A0–A6 | Hardware I²C address inputs | 7 binary inputs set unique slave address; externally pulled HIGH/LOW; enable up to 126 devices on one bus. |
| OE | Active-low output enable | Hardware blink/dim control; overrides all PWM settings when asserted; synchronizes multiple PCA9626B,118 devices. |
| SDA / SCL | I²C bidirectional data / clock | Fm+ interface with noise filtering; SDA has 30 mA drive capability for high-capacitance buses. |
| VDD / VSS | Power supply / ground | VDD = 2.3–5.5 V; 13 VSS pins distributed across package for low-impedance grounding and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Chase Byte pattern engine | Reduces marquee effect command count by >70% vs. register-by-register writes; enables 24 predefined ON/OFF sequences via single-byte CHASE register access. |
| Software Reset (SWRST) | Resets all registers to POR defaults (outputs OFF) via I²C address 06h; eliminates need for power cycle during firmware reconfiguration. |
| Output update timing control | Selectable change-on-ACK or change-on-STOP (MODE2.OCH) enables precise synchronization across multiple PCA9626B,118 devices in multi-chip LED arrays. |
| Multi-level I²C addressing | Supports broadcast (All Call), subgroup (Sub Call), and individual addressing - enabling efficient control of mixed-color LED banks (e.g., all red LEDs simultaneously). |
| Internal 25 MHz oscillator | Eliminates external crystal/capacitor; ensures stable 97 kHz/190 Hz PWM timing across voltage/temperature; reduces BOM count and PCB area. |
Applications
| RGB LED Status Indicators | Keypad Backlighting |
|---|---|
|
Use Scenario: Multi-color status feedback on industrial HMI panels requiring distinct visual states (e.g., green=ready, red=alarm, amber=warning). IC Role / Device Role / Timing Role: PCA9626B,118 drives 24 discrete RGB LEDs with independent brightness control and synchronized blinking via OE pin. Use Value: Eliminates microcontroller GPIO overhead and PWM timer resources; enables smooth color transitions using 256-step linear dimming per channel. |
Use Scenario: Uniform backlighting for membrane keypads in handheld medical devices with low-power sleep mode requirements. IC Role / Device Role / Timing Role: PCA9626B,118 provides 24-channel current-sink drive with SLEEP bit (MODE1.SLEEP) disabling oscillator to reduce standby current. Use Value: Achieves <1 µA typical standby current while retaining full I²C addressability; enables instant wake-up without reinitialization. |
| Marquee Display Effects | LCD Backlight Dimming |
|
Use Scenario: Directional scrolling text or icon animation on consumer electronics front panels using 24-LED linear arrays. IC Role / Device Role / Timing Role: PCA9626B,118 executes preloaded LTR (Left-to-Right) chase patterns via CHASE register with single-byte updates. Use Value: Reduces host MCU bandwidth usage by 92% vs. manual LED state writes; enables real-time pattern switching with zero latency. |
Use Scenario: Adaptive brightness control for small-format LCDs in automotive infotainment displays under varying ambient light. IC Role / Device Role / Timing Role: PCA9626B,118 applies group PWM (GRPPWM/GRPFREQ) to all 24 channels simultaneously for uniform backlight dimming/blinking. Use Value: Maintains consistent color temperature across dimming range; avoids visible flicker with 190 Hz group PWM base frequency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9635PW,118 | 24-channel, 100 mA, but lacks Chase Byte and group frequency programming; GRPFREQ fixed at 190 Hz only. | Supports basic dimming/blinking but cannot execute marquee patterns or variable-speed blinking without host intervention. | Choose PCA9635PW,118 when design requires lower cost and simpler control, with no dynamic pattern sequencing needed. |
| TLC5947RTQR | 24-channel, 120 mA, SPI interface (not I²C); no hardware OE pin; uses external oscillator; no All Call/Sub Call addressing. | Requires dedicated SPI lines and MCU GPIOs; unsuitable for shared-bus multi-device synchronization or broadcast commands. | Choose TLC5947RTQR when higher current per channel is critical and I²C bus constraints or group addressing are not required. |
Compared with PCA9635PW,118 and TLC5947RTQR, the PCA9626B,118 uniquely combines Fm+ I²C scalability (126 devices), hardware-synchronized blinking (OE), and pattern acceleration (Chase Byte) - making it optimal for space-constrained, multi-LED UIs demanding minimal host overhead and deterministic timing.
Availability
PCA9626B,118 is available at Aetrix Electronics and suitable for RGB LED status indicators, keypad backlights, marquee display effects, and LCD backlight dimming requiring stable component supply across industrial, medical, and automotive-grade production cycles.
Supply support for PCA9626B,118 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 I²C peripheral IP and LED lighting control.
The PCA9626B,118 belongs to NXP's Fm+ LED driver family, designed specifically for high-density, low-software-overhead LED array control in human-machine interfaces where synchronized multi-device operation and pattern efficiency are critical.
FAQ
What is the maximum number of PCA9626B,118 devices supported on a single I²C bus?
The PCA9626B,118 supports up to 126 devices on one I²C bus using its 7 hardware address pins (A0–A6). Two addresses (Software Reset and LED All Call) are reserved at power-up, leaving 126 usable individual addresses. This enables large-scale LED matrix systems without bus contention or address conflicts.
How does the Chase Byte feature reduce firmware complexity in marquee applications?
The Chase Byte (register 1Ch) allows the PCA9626B,118 to execute predefined 24-bit LED ON/OFF patterns - such as left-to-right scrolling or half-chase sequences - with a single I²C write. Instead of sending 24 separate commands per frame, the host MCU sends one byte to trigger the pattern, cutting communication overhead by over 90% and eliminating timing-critical burst writes.
Can the PCA9626B,118 drive LEDs with forward voltages exceeding 5.5 V?
Yes. The PCA9626B,118's 24 open-drain outputs tolerate up to 40 V in the off state, allowing direct connection to high-VF LED strings (e.g., white or blue LEDs in series) powered from separate 12 V or 24 V rails. The IC itself operates from 2.3–5.5 V VDD, isolating logic and power domains.
What is the function of the OE (Output Enable) pin on the PCA9626B,118?
The active-low OE pin on the PCA9626B,118 provides hardware-level override of all LED outputs: when asserted (LOW), it forces all 24 channels OFF regardless of PWM or group settings. It also enables synchronized blinking across multiple PCA9626B,118 devices without software coordination - essential for fail-safe visual alerts.
Does the PCA9626B,118 require an external crystal or resonator?
No. The PCA9626B,118 integrates a 25 MHz internal oscillator that generates all timing signals - including the 97 kHz individual PWM and 190 Hz group PWM - without external components. This reduces BOM cost, PCB area, and layout sensitivity while ensuring stable operation across temperature and voltage ranges.
PCA9626B,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 48-LQFP
- 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-LQFP (7x7)
PCA9626B,118 FAQ
1.How can I place an order for PCA9626B,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9626B,118 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 PCA9626B,118 reliable?
The price and inventory of PCA9626B,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9626B,118 is usually 5 days.
3.What payment methods are accepted for PCA9626B,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9626B,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9626B,118?
PCA9626B,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9626B,118 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 PCA9626B,118?
For technical support, including PCA9626B,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9626B,118 requirements.
6.How does Aetrix verify that PCA9626B,118 is sourced from the original manufacturer or authorized distributors?
All PCA9626B,118 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 PCA9626B,118 meets industry standards.
7.What is the process for return or replacement of PCA9626B,118?
All PCA9626B,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9626B,118, 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 PCA9626B,118 part is unused and in its original packaging.
Return procedure for PCA9626B,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCA9626B,118 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
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