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NXP Semiconductors PCA9624PW,112
- Part No.:
- PCA9624PW,112
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PCA9624PW,112.pdf
- Description:
- IC LED DRV LIN PWM 100MA 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,146
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Product details
Overview
PCA9624PW,112 from NXP Semiconductors is an I²C-bus controlled 8-channel LED driver optimized for RGBA LED dimming and synchronized blinking. It delivers 100 mA per open-drain output with 40 V voltage tolerance, supports 8-bit individual PWM (97 kHz) and group PWM (190 Hz fixed or 24 Hz–10.73 s programmable), and operates from 2.3 V to 5.5 V supply. It enables precise brightness control in status indicators and keypad backlights.
For engineers reviewing the PCA9624PW,112 datasheet, PCA9624PW,112 pinout, PCA9624PW,112 application, or PCA9624PW,112 equivalent, key selection considerations include its Fast-mode Plus (1 MHz) I²C interface, hardware addressability (up to 126 devices), active-low OE pin for hardware synchronization, and dual-level PWM architecture enabling independent per-LED and global intensity/blinking control.
Technical Context
The PCA9624PW,112 integrates a 25 MHz internal oscillator-no external crystal required-and implements two independent PWM layers: eight 97 kHz individual channels (256-step linear duty cycle) and one group channel with selectable mode (190 Hz dimming or 24 Hz–10.73 s blinking). Its MODE1/MODE2 registers configure output behavior (off/on/PWM/group-PWM), auto-increment addressing, and OE synchronization timing.
I²C communication uses a 7-bit slave address with seven hardware pins (A0–A6) supporting up to 126 unique addresses, plus four software-programmable group addresses (All Call E0h, Sub Call E2h/E4h/E8h) and a dedicated Software Reset address (06h). Output state changes can be synchronized to either ACK or STOP command via MODE2 bit OCH.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Interface | Fast-mode Plus (Fm+), 1 MHz max clock - supports high-capacitance buses up to 4000 pF with 30 mA SDA drive strength. |
| LED Outputs | 8 open-drain channels, each sinking 0–100 mA with 40 V off-state voltage tolerance - drives common-anode RGBA LEDs directly without external FETs. |
| Individual PWM | 97 kHz fixed frequency, 256-step (0–99.6 %) linear duty cycle per channel - enables flicker-free, high-resolution brightness control. |
| Group PWM | 190 Hz fixed dimming OR programmable blink period (24 Hz to 10.73 s) + 0–99.6 % duty cycle - allows uniform intensity scaling or synchronized blinking across all LEDs. |
| Supply Range | 2.3 V to 5.5 V VDD - compatible with 3.3 V and 5 V logic systems; non-LED pins tolerate up to 5.5 V. |
| Operating Temp | −40 °C to +85 °C - qualified for industrial and consumer portable applications including handheld devices. |
| Package | TSSOP24 (SOT355-1), 4.4 mm body width - surface-mount, RoHS-compliant, thermal performance validated for continuous 100 mA per channel. |
Pinout & Package
TSSOP24 package (SOT355-1) with 0.65 mm lead pitch; exposed pad not present (unlike HVQFN24); requires standard reflow profile for plastic small-outline packages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 12, 13, 18 | VSS | Ground reference for logic and LED sink paths - all five pins must be connected to system GND for stable operation and noise immunity. |
| 2–6, 20–21 | A0–A6 | Hardware I²C address inputs - set unique 7-bit slave address; floating = undefined behavior; pull HIGH/LOW externally. |
| 8–11, 14–17 | LED0–LED7 | Open-drain LED sink outputs - each independently controllable via PWM registers; 40 V tolerant, no internal current limiting beyond 100 mA max. |
| 19 | OE | Active-low output enable - synchronizes all LED outputs; HIGH = high-Z (LEDs off), LOW = enabled; usable for external PWM dimming if internal group control disabled. |
| 22 | SCL | I²C clock input - accepts 1 MHz Fm+ signals; includes noise filtering per JESD22-A114. |
| 23 | SDA | I²C bidirectional data line - 30 mA drive strength supports long traces or multiple loads; includes noise filtering. |
| 24 | VDD | Primary power supply - powers internal logic, oscillator, and output drivers; decoupling capacitor (100 nF) recommended near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Software Reset (SWRST) | Reset to POR state via I²C address 06h - reinitializes all registers without power cycle; critical for recovery in embedded firmware updates. |
| Group Addressing | Four programmable I²C addresses (All Call + three Sub Calls) - enables simultaneous control of LED subsets (e.g., all reds, all status LEDs) minimizing bus traffic. |
| Output Update Timing | Selectable change-on-ACK or change-on-STOP - ensures atomic register updates across multiple PCA9624PW,112 devices for synchronized visual effects like marquee chasing. |
| Internal Oscillator | 25 MHz precision oscillator - eliminates external crystal/capacitor, reduces BOM count, and guarantees stable PWM timing across temperature and voltage. |
| Hot Insertion Support | Robust I/O structure with 5.5 V-tolerant non-LED pins and glitch-free power-up - allows safe live insertion into powered-backplane systems. |
Applications
| RGB 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: LED driver providing independent 8-bit brightness control per color channel with synchronized group blinking for attention-grabbing alerts. Use Value: Eliminates microcontroller GPIO overhead and software PWM timing constraints while delivering consistent, calibrated color intensity across temperature. |
Use Scenario: Uniform backlighting for membrane keypads in cellular phones and handheld medical devices with variable ambient light conditions. IC Role / Device Role / Timing Role: Constant-current sink driver with 256-step dimming resolution and low standby current (<1 μA in sleep mode). Use Value: Enables smooth brightness ramping and battery-efficient operation via I²C commands instead of analog potentiometers or discrete transistors. |
| LED Display Segments | LCD Backlight Control |
Use Scenario: Driving 7-segment or dot-matrix LED displays in point-of-sale terminals where segment brightness must match branding requirements. IC Role / Device Role / Timing Role: High-current (100 mA/channel) open-drain driver with 40 V tolerance - supports multiplexed common-anode displays with >3 V forward voltage LEDs. Use Value: Reduces external component count by integrating current-setting resistors into PWM duty-cycle control, simplifying layout and calibration. |
Use Scenario: Edge-lit LCD backlight for compact displays in automotive infotainment or portable test equipment. IC Role / Device Role / Timing Role: Group PWM dimming controller with 190 Hz fixed frequency - avoids visible flicker while enabling precise luminance matching to display gamma curves. Use Value: Provides flicker-free dimming down to 0.4 % brightness (1/256 step) without requiring high-frequency MCU timers or external DC-DC converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9634PW,112 | Same pinout and register map, but with 150 mA per channel and higher 50 V LED voltage tolerance - no integrated FETs; requires external drivers. | Used when higher current or voltage headroom is needed beyond PCA9624PW,112's 100 mA/40 V limits, e.g., driving high-Vf white LEDs or longer LED strings. | Select PCA9634PW,112 only if external driver stages are already part of the design; otherwise PCA9624PW,112 offers lower BOM cost and simpler layout. |
| TLC59283DBQR | 16-channel constant-current LED driver with 12-bit PWM (4096 steps), 30 MHz SPI interface, and 35 V rating - no I²C or group-blink capability. | Preferred for high-resolution monochrome LED arrays (e.g., signage) where SPI speed and fine-grained dimming outweigh I²C simplicity and group control. | Choose TLC59283DBQR when >256 brightness steps or faster update rates (>1 MHz) are required; PCA9624PW,112 remains optimal for I²C-constrained, multi-color, synchronized-blink designs. |
Compared with PCA9624PW,112, PCA9634PW,112 extends voltage/current capability at the cost of added external components, while TLC59283DBQR trades I²C simplicity and group-blink functionality for higher PWM resolution and SPI throughput - making PCA9624PW,112 the most balanced choice for cost-sensitive, multi-color, synchronized LED systems.
Availability
PCA9624PW,112 is available at Aetrix Electronics and suitable for RGB status indicators, keypad backlights, LED display segments, and LCD backlighting requiring stable component supply and industrial-grade temperature operation.
Supply support for PCA9624PW,112 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 PCA9624PW,112 belongs to NXP's Fm+ LED driver family, engineered specifically for high-density, low-software-overhead LED control in space-constrained portable and industrial interfaces.
FAQ
What is the maximum number of PCA9624PW,112 devices that can share one I²C bus?
The PCA9624PW,112 supports up to 126 unique addresses using its seven hardware address pins (A0–A6). Two addresses (Software Reset and LED All Call) are reserved at power-up, leaving 126 usable slave addresses. This enables large-scale LED arrays with minimal bus contention and deterministic addressing - essential for modular display systems and multi-zone lighting controllers.
Does PCA9624PW,112 require an external crystal or resonator?
No, the PCA9624PW,112 integrates a 25 MHz internal oscillator with no external components required. This eliminates crystal placement, load capacitance tuning, and associated PCB area - reducing BOM cost and improving reliability in vibration-prone or thermally cycling environments where external crystals may drift or fail.
How does the active-low OE pin function in PCA9624PW,112?
The OE pin on PCA9624PW,112 enables hardware-level synchronization: pulling OE LOW activates all LED outputs; pulling OE HIGH places them in high-impedance state (LEDs off). It supports external PWM dimming only when internal group control (DMBLNK) is disabled - otherwise timing conflicts cause undefined behavior per datasheet Section 7.4.
Can PCA9624PW,112 drive common-cathode LED configurations?
No, PCA9624PW,112 features open-drain outputs designed exclusively for common-anode LED connections - the LED anodes connect to a positive supply (≤40 V), and the PCA9624PW,112 sinks current through cathodes. Driving common-cathode LEDs would require external high-side switches and negate the device's integrated sink architecture.
What is the purpose of the GRPFREQ register in PCA9624PW,112?
The GRPFREQ register (address 0Bh) sets the global blinking period when DMBLNK = 1 in MODE2. Its 256-step value defines blink intervals from 41 ms (24 Hz) to 10.73 s - enabling slow-pulse alerts or rapid strobes without MCU intervention. When DMBLNK = 0, GRPFREQ is ignored and GRPPWM controls uniform dimming at 190 Hz.
PCA9624PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 8
- 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:
- 24-TSSOP
PCA9624PW,112 FAQ
1.How can I place an order for PCA9624PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9624PW,112 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 PCA9624PW,112 reliable?
The price and inventory of PCA9624PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9624PW,112 is usually 5 days.
3.What payment methods are accepted for PCA9624PW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9624PW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9624PW,112?
PCA9624PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9624PW,112 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 PCA9624PW,112?
For technical support, including PCA9624PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9624PW,112 requirements.
6.How does Aetrix verify that PCA9624PW,112 is sourced from the original manufacturer or authorized distributors?
All PCA9624PW,112 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 PCA9624PW,112 meets industry standards.
7.What is the process for return or replacement of PCA9624PW,112?
All PCA9624PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9624PW,112, 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 PCA9624PW,112 part is unused and in its original packaging.
Return procedure for PCA9624PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCA9624PW,112 Tags
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