PCA9633TK,118 - 4-bit 25mA I2C LED Driver HVSON8 | NXP
Teilenummer: PCA9633TK,118 ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $1.57 | $1,57 |
| 10 | $1.41 | $14,10 |
| 100 | $1.27 | $127,00 |
| 500 | $1.13 | $565,00 |
| 1.000 | $1.02 | $1.020,00 |
| 3.000 | $0.91 | $2.730,00 |
PCA9633TK,118 Übersicht
A LED driver (Light-Emitting Diode driver) is an active electronic circuit that regulates current or voltage through one or more LEDs to set brightness, color mixing, and on/off timing. Within the broader power-management hierarchy, the PCA9633 sits under constant-current LED drivers -> LED drivers -> power management ICs -> semiconductors. The PCA9633TK variant uses voltage-switch (open-drain) outputs, making it well suited to driving low-voltage LEDs or external MOSFET-controlled higher-current strings while the host MCU retains color-mixing intelligence.
Key differentiating features include per-output 8-bit PWM at 97.6 kHz nominal frequency to eliminate audible flicker in RGBA mixing, software-programmable output state inversion, group PWM/blink control, and a hardware-reset input with power-on reset. The wide 2.3 V-5.5 V supply range supports both 3.3 V and 5 V logic rails commonly found in RGB backlights and indicator panels.
Architecturally the part uses an I2C slave state machine, a 4 MHz internal oscillator (divided down for PWM), and four open-drain output drivers rated at 25 mA continuous each. Outputs can be paralleled for higher current without external logic changes, and the device supports up to 126 selectable I2C addresses in the 16-pin version, enabling large addressable LED arrays.
Typical applications include RGBA color-mixing for signage and architectural lighting, RGB keypad backlighting in consumer electronics, status indicators on networking hardware, and LED-blinking alert patterns on industrial HMIs. Designers choose this part when they need fine-grained PWM control of four low-current LEDs without an external driver FET.
When designing, confirm that each LED's forward voltage does not exceed the open-drain pull-up tolerance and select a current-limit resistor (or constant-current driver) sized for the chosen LED bin. Decouple VDD with a 100 nF ceramic capacitor placed within 2 mm of the supply pin to suppress switching transients during PWM transitions.
This page synthesizes distributor pricing, drop-in HVSON8 alternatives, and practical design considerations not consolidated on the manufacturer product page.
Drop-in-Alternativen für PCA9633TK,118 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PCA9633TK
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
PCA9532TK,118
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PCA9633DP,118
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
PCA9634TK,118
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
BCR321UE6327
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PCA9633TK,118 Grenzwerte & elektrische Eigenschaften
| Product Type | LED Driver IC |
| Topologie | Open-Drain Voltage Switch |
| Anzahl der Ausgänge | 4 |
| Output Current per Channel | 25 mA |
| PWM Resolution | 8-bit (256 steps) per channel |
| PWM Frequency (nominal) | 97.6 kHz |
| Color Mixing Channels | Red, Green, Blue, Amber (RGBA) |
| Schnittstelle | I2C (Fast-Mode Plus, up to 1 MHz) |
| I2C Bus Address Options | Fixed (8-pin version) |
| Supply Voltage (VDD) | 2.3 V to 5.5 V |
| Logic High Input Voltage | 0.7 x VDD minimum |
| Betriebstemperatur | -40 C to +85 C |
| Gehäuse | HVSON-8 (3 x 3 mm) with exposed pad |
| Montageart | Surface Mount |
| MSL-Level | 1 |
| RoHS-Status | Compliant |
| Ausgangstyp | Open-Drain / Voltage Switch |
PCA9633TK,118 Pin-Konfiguration
| Pin 1 | A0 — I2C-bus address select / LED3 output (function depends on version) |
| Pin 2 | VDD — Supply voltage, 2.3 V to 5.5 V |
| Pin 3 | SDA — I2C-bus serial data |
| Pin 4 | SCL — I2C-bus serial clock |
| Pin 5 | OE — Output enable (active low) / hardware reset |
| Pin 6 | LED0 — LED driver output 0 (open-drain, 25 mA) |
| Pin 7 | LED1 — LED driver output 1 (open-drain, 25 mA) |
| Pin 8 | EP — Exposed pad - thermal/ground, must be soldered to PCB ground |
Typische Anwendungen
PCA9633TK,118 ist geeignet für 6 Anwendungs: RGBA Color-Mixing LED Panels, RGB Keypad Backlighting, Industrial HMI Status Indicators, Networking Equipment Port LEDs, Consumer Gaming Peripheral Lighting, Architectural and Accent Lighting.
RGBA Color-Mixing LED Panels
The PCA9633TK fits RGBA color-mixing LED panels because each of its 4 open-drain outputs provides 8-bit (256-step) PWM at 97.6 kHz, allowing smooth color gradients and flicker-free brightness transitions. With 25 mA per channel it directly drives low-current RGBA indicator LEDs or external N-FET gates for higher-current strings. The 1 MHz Fast-Mode Plus I2C bus minimizes refresh latency across daisy-chained panels, while the 2.3 V-5.5 V supply accepts either 3.3 V or 5 V host logic. Designers typically add 100 nF VDD decoupling within 2 mm of the IC and size current-limit resistors to the LED bin's Vf.
Empfohlen
RGB Keypad Backlighting
In RGB keypad backlighting, the PCA9633TK drives red, green, and blue LEDs (one per channel, fourth channel for amber or white) with independent 256-step PWM. The 97.6 kHz PWM frequency sits well above the human flicker-fusion threshold, ensuring smooth dimming during typing or gaming. The wide 2.3-5.5 V supply range lets the part share the keypad's 3.3 V rail without an extra LDO. The HVSON-8 (3 x 3 mm) footprint is small enough for space-constrained membrane or chiclet keyboards, and the exposed pad provides thermal relief for continuous backlight operation.
Empfohlen
Industrial HMI Status Indicators
Industrial HMI panels use the PCA9633TK to drive four-color RGBA status LEDs (power, fault, run, comm) with smooth pulse and blink patterns. Per the NXP datasheet, the device's group PWM/blink registers let the host pre-program blinking sequences that run autonomously, freeing the MCU for control-loop duties. The 1 MHz I2C and 126-address family supports multi-panel installations, and the -40 C to +85 C operating range covers factory-floor environments. Add TVS diodes on SDA/SCL for installations near motor drives or relays.
Empfohlen
Networking Equipment Port LEDs
Routers, switches, and optical transceivers use the PCA9633TK to drive per-port link/speed/activity indicators. Each of the four channels independently controls red/green/amber LEDs on two stacked RJ45 ports, with 256-step PWM enabling slow-pulse heartbeat patterns. The 2.3-5.5 V supply works from standard 3.3 V networking ASIC rails, and 1 MHz I2C avoids bottlenecks when updating 24 or 48 ports. Designers chain multiple PCA9633TK parts on the bus and use the OE pin for synchronized blink across all ports during firmware upgrades.
Empfohlen
Consumer Gaming Peripheral Lighting
Gaming mice, keyboards, and headsets use the PCA9633TK to drive underglow and per-key RGB lighting with 8-bit color depth and 97.6 kHz PWM to eliminate any chance of flicker on high-refresh-rate cameras used by streamers. The 4-channel RGBA capability matches the typical 4-LED zone structure of compact peripherals, and the I2C interface keeps GPIO free on the host MCU. The exposed pad on the HVSON-8 package doubles as a thermal relief when all four LEDs are at full brightness continuously.
Empfohlen
Architectural and Accent Lighting
Architectural accent lighting installations use the PCA9633TK to drive RGBA strip segments or dot strings where each segment needs 256-step color blending. The wide 2.3-5.5 V supply lets the part run from a 5 V LED rail, and the open-drain outputs switch external N-FETs to control 12 V or 24 V LED strings for higher-power applications. The 1 MHz I2C bus enables daisy-chained long strips with synchronized color changes, and the -40 C to +85 C rating supports outdoor enclosures with thermal management.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PCA9633TK,118 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PCA9633TK | PCA9532TK,118 | PCA9633DP,118 | PCA9634TK,118 | BCR321UE6327 |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Infineon |
| Package | HVSON-8 (3x3 mm) | HVSON-8 (3x3 mm) - same | HVSON-8 (3x3 mm) - same | TSSOP-10 - different | HVSON-8 (3x3 mm) - same | PG-SC74-6 - different |
| Number of Outputs | 4 | 4 | 16 (16-bit driver, 2-bit PWM) | 4 | 8 | 3 |
| PWM Resolution | 8-bit (256 steps) | 8-bit (256 steps) | 2-bit (4 steps) | 8-bit (256 steps) | 8-bit (256 steps) | No PWM (DC bias control) |
| PWM Frequency (nominal) | 97.6 kHz | 97.6 kHz | Programmable blink | 97.6 kHz | 97.6 kHz | N/A |
| I2C Bus Speed | 1 MHz (Fm+) | 1 MHz (Fm+) | 400 kHz | 1 MHz (Fm+) | 1 MHz (Fm+) | N/A (no I2C) |
| Output Type | Open-Drain | Open-Drain | Open-Drain | Open-Drain | Open-Drain | Constant-Current |
Wichtigste Unterscheidungsmerkmale
- 8-bit (256-step) PWM at 97.6 kHz - smooth, flicker-free color mixing (vs. PCA9532TK,118)
- 1 MHz Fast-Mode Plus I2C for high-speed host communication (vs. PCA9532TK,118)
- 4 dedicated RGBA outputs in a 3x3 mm HVSON-8 footprint (vs. PCA9634TK,118)
Designhinweise
Decouple VDD with a 100 nF X7R ceramic capacitor placed within 2 mm of the HVSON-8 supply pin. The exposed pad (EP) must be soldered to a continuous PCB ground plane to provide both thermal dissipation and electrical reference; a missing or dry-jointed EP can cause erratic I2C behavior and channel-to-channel leakage. Total supply current at 4 active 25 mA outputs is well under 150 mA, so no extra bulk capacitance is required beyond the local 100 nF.
Route the I2C SDA and SCL traces as a parallel pair with 4W-7W spacing on an inner or top layer, and keep total bus capacitance (including device pins and trace capacitance) under 400 pF for reliable 400 kHz operation or under 100 pF for 1 MHz Fast-Mode Plus. Place 2.2 kohm-4.7 kohm pull-ups to VDD on both lines; if multiple PCA9633TK parts share the bus, use stronger pull-ups (1 kohm-2.2 kohm) at the master end to compensate for cumulative capacitance.
At all four outputs continuously sourcing 25 mA with a low VDS drop, the on-chip dissipation is typically under 100 mW and well within the HVSON-8 thermal envelope (junction temperature rise approximately [DATA_NEEDED: theta_JA]). The exposed pad dominates thermal performance; a minimum 25 mm^2 copper pour on the top layer connected to EP is sufficient for ambient operation up to 70 C. For enclosed lighting fixtures above 70 C, expand the copper area or add thermal vias to an inner ground plane.
Estimated: At 25 mA per channel and 4 channels simultaneously, total LED current is 100 mA; ensure the host VDD rail can supply this plus I2C pull-up current without sagging. Do not exceed the absolute maximum LED output voltage of 5.5 V - if driving LEDs with Vf above 5 V, add a level shifter or external pull-up to a higher rail with appropriate current limiting. The OE pin doubles as a hardware reset; leaving it floating at power-up is undefined - tie OE to VDD through a 100 kohm resistor if unused.
Compliance-Informationen
RoHS compliant and lead-free per NXP product page. AEC-Q100 qualification not applicable for this consumer/industrial-grade LED driver; for automotive LED matrix designs, evaluate AEC-Q100-qualified NXP parts such as PCA9955BTW.
