PCA9532BS - 16-bit I2C LED Driver, 25 mA, 400 kHz, HVQFN24
Référence : PCA9532BS ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $2.45 | $2,45 |
| 10 | $2.18 | $21,80 |
| 100 | $1.84 | $184,00 |
| 500 | $1.52 | $760,00 |
| 1 000 | $1.21 | $1 210,00 |
| 2 500 | $1.05 | $2 625,00 |
PCA9532BS Présentation
An LED driver IC is a specialized power-management semiconductor that translates low-level digital commands (typically I2C) into per-channel current sinks or sources for solid-state lighting. LED drivers sit within the broader hierarchy of display and lighting ICs, bridging microcontrollers and high-brightness LED arrays, and are commonly used in laptops, monitors, and architectural lighting. The PCA9532 family specifically targets I2C-controlled PWM dimming with hardware-software frequency selection and two programmable blink rates.
Key features include 16 individually programmable outputs, a built-in 256-step PWM that can be assigned to any output in two banks, software and hardware selectable I2C addresses (up to 8 devices on one bus), a 400 kHz Fast-mode I2C interface, an internal oscillator with two user-programmable blink rates, and 25 mA continuous per-channel sink current. Each output can be independently set to ON, OFF, blink at a programmed rate, or PWM-dimmed to one of 256 brightness levels.
Internally, the PCA9532BS combines a CMOS I2C slave with logic decoders, two 8-bit PWM frequency registers, two 8-bit PWM registers that the device multiplies to 256 steps, and 16 open-drain MOSFET drivers. The 256-step PWM is created internally rather than counted out by the host, freeing the MCU for other work and ensuring consistent dimming across all channels regardless of bus traffic.
Typical applications include RGB LED color mixing for ambient lighting, LED backlight control in LCD panels and notebooks, status indicators and signage, keypad backlights, and any compact electronic product that needs software-controllable individual LED brightness. Two PCA9532 devices can be configured to drive 32 LEDs in a stereo audio bar-graph or 24 LEDs plus a keypad scanner in a handheld instrument.
When designing with the PCA9532BS, place a 0.1 uF bypass capacitor close to VDD, use a 1.5 kohm pull-up on SDA/SCL for reliable 400 kHz operation, and ensure the LED supply (typically 3.3 V or 5 V) stays within the absolute maximum ratings. Output current should be limited by a series resistor; do not exceed 25 mA continuous per pin or the device will enter thermal shutdown.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical PCB-level design notes not found in a single manufacturer document - use the comparison table to evaluate 25 mA vs higher-current siblings, and review the design_notes for HVQFN thermal-pad layout guidance.
Alternatives de remplacement direct pour PCA9532BS — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PCA9532BS (même facteur de forme et même empreinte) — différant par Interface, Package.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PCA9552BS
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
PCA9532BS,118
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PCA9633DPW
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
PCA9532BS Valeurs maximales et caractéristiques électriques
| Fonction | 16-bit I2C/SMBus I/O expander with LED dimming |
| Nombre de sorties | 16 |
| Type de sortie | Open-drain voltage switch (LED sink) |
| Per-Channel Continuous Current | 25 mA |
| PWM Dimming Steps | 256 (8-bit) per output, two banks |
| PWM Frequency Sources | Internal oscillator, two user-programmable blink rates |
| Interface | I2C-bus / SMBus, Fast-mode 400 kHz |
| Selectable I2C Addresses | 8 (3 hardware address pins + software enable) |
| Température de fonctionnement | -40 C to +85 C |
| Boîtier | HVQFN-24 (SOT616-1), 4 mm x 4 mm |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
Configuration des broches de PCA9532BS
| Broche 1 | LED0 — Open-drain LED output 0 |
| Broche 2 | LED1 — Open-drain LED output 1 |
| Broche 3 | LED2 — Open-drain LED output 2 |
| Broche 4 | LED3 — Open-drain LED output 3 |
| Broche 5 | LED4 — Open-drain LED output 4 |
| Broche 6 | LED5 — Open-drain LED output 5 |
| Broche 7 | LED6 — Open-drain LED output 6 |
| Broche 8 | LED7 — Open-drain LED output 7 |
| Broche 9 | SCL — I2C clock input (400 kHz) |
| Broche 10 | SDA — I2C data line (open-drain) |
| Broche 11 | GND — Ground reference |
| Broche 12 | VDD — Supply voltage (2.3 V to 5.5 V) |
| Broche 13 | LED8 — Open-drain LED output 8 |
| Broche 14 | LED9 — Open-drain LED output 9 |
| Broche 15 | LED10 — Open-drain LED output 10 |
| Broche 16 | LED11 — Open-drain LED output 11 |
| Broche 17 | LED12 — Open-drain LED output 12 |
| Broche 18 | LED13 — Open-drain LED output 13 |
| Broche 19 | LED14 — Open-drain LED output 14 |
| Broche 20 | LED15 — Open-drain LED output 15 |
| Broche 21 | A0 — Hardware I2C address input 0 |
| Broche 22 | A1 — Hardware I2C address input 1 |
| Broche 23 | A2 — Hardware I2C address input 2 |
| Broche 24 | EP — Exposed thermal pad (must be soldered to copper pour for dissipation) |
Applications typiques
PCA9532BS convient pour 6 applications: RGB LED Color-Mixing Ambient Lighting, LCD Backlight Control in Monitors and Notebooks, Status Indicators and Signage, Mobile Phone and Wearable Keypad Backlights, Automotive Interior Mood Lighting, Industrial Control Panel LED Feedback.
RGB LED Color-Mixing Ambient Lighting
The PCA9532BS drives the three color channels of an RGB LED strip for accent and ambient lighting where the host MCU sets a target hue and lets the IC handle 256-step PWM. Its 25 mA per-channel sink is well-matched to standard 20 mA RGB LEDs driven from a 5 V rail, and the two-bank architecture lets one PCA9532BS generate complementary blink patterns for status indication without extra firmware overhead. Up to 8 devices share one I2C bus, so a multi-zone lighting rig can scale to 128 channels. Compared with a discrete MOSFET + firmware-PWM approach, the PCA9532BS frees the MCU from interrupt-driven PWM timing, reducing BOM cost and code complexity for residential and automotive interior lighting.
Recommandé
LCD Backlight Control in Monitors and Notebooks
The PCA9532BS is engineered specifically for LED backlight applications in displays, where each channel powers one string of white backlight LEDs via a series resistor. With 16 channels and 25 mA sink capability, one IC drives 16 parallel strings from a 12 V backlight rail, and the 256-step PWM allows smooth brightness control in response to ambient light sensor feedback. Two PCA9532BS devices can be cascaded on the bus to drive a 32-string layout common in 24-inch monitors. Compared with a switching LED driver topology, the PCA9532BS approach trades efficiency for ultra-fine 8-bit dimming granularity and noiseless PWM transitions, which is critical for flicker-free reading of fine text on LCD panels.
Recommandé
Status Indicators and Signage
The PCA9532BS controls up to 16 individual indicator LEDs - from server status panels to industrial machine HMI - where each LED must be independently ON, OFF, blinking at one of two hardware rates, or pulse-width modulated. The two programmable blink rates are set once and reused across all channels, so a host only writes a register when the pattern changes. At 25 mA per channel, the IC drives standard 2 mA to 20 mA indicator LEDs directly. Compared with GPIO expanders like the PCF8575, the PCA9532BS offers integrated PWM and blink hardware, eliminating software timing loops in the MCU and producing visibly synchronized blinks across the panel.
Recommandé
Mobile Phone and Wearable Keypad Backlights
The PCA9532BS's HVQFN-24 (4x4 mm) footprint and 2.3-5.5 V supply make it well-suited to compact mobile devices that drive keypad or notification backlights from a single-cell Li-ion voltage. Each output's 25 mA sink feeds one backlight zone with brightness PWM'd in 256 steps to match ambient lighting. Three address pins allow the same firmware to control a 4-key, 8-key or 16-key backlight board by setting A0-A2 at board test. Compared with discrete LED driver chips that need external MOSFETs, the PCA9532BS integrates 16 drivers in one tiny QFN, saving roughly 50 mm^2 of board space in phones and wearables.
Recommandé
Automotive Interior Mood Lighting
The PCA9532BS, with its 25 mA per-channel rating, drives LED strings used in door-panel, footwell, and dashboard accent lighting where automotive reliability matters. Two internal PWM banks create smooth cross-fades between colors without host MCU overhead, and the -40 C to +85 C operating range handles under-dash and cabin temperatures. Up to 8 ICs on one bus give 128 independently-dimmed channels - enough for a full premium-vehicle interior mood-lighting rig. Compared with a LIN-bus LED driver, the PCA9532BS approach trades automotive-bus isolation for compact I2C control and considerably lower BOM cost in non-safety-critical interior zones.
Recommandé
Industrial Control Panel LED Feedback
The PCA9532BS controls 16 status LEDs on a PLC or industrial HMI front panel - one channel per machine state, alarm indicator, or operator push-button backlight. With 400 kHz Fast-mode I2C, a single MCU efficiently updates many panels on the same bus. The 25 mA sink supports bright LEDs visible in factory lighting, and the wide 2.3-5.5 V supply accepts both 3.3 V and 5 V PLC backplanes. Compared with a shift-register LED driver chain, the PCA9532BS provides random-access register writes (any single LED, any time) and bidirectional feedback possibilities, simplifying diagnostic firmware in industrial environments.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PCA9532BS — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PCA9552BS | PCA9532BS,118 | PCA9633DPW |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors - same brand | NXP Semiconductors - same brand | NXP Semiconductors - same brand |
| Package | HVQFN-24 (SOT616-1), 4x4 mm | HVQFN-24 (SOT616-1), 4x4 mm - identical | HVQFN-24 (SOT616-1), 4x4 mm - identical | TSSOP-20 baseline - different package, replacement not for HVQFN-24 layout |
| Per-Channel Current | 25 mA | 20 mA (-20%) | 25 mA (identical) | 5 mA (-80%) |
| Number of Outputs | 16 | 16 | 16 | 16 |
| PWM Dimming Steps | 256 (8-bit), two banks | 256 (8-bit), two banks | 256 (8-bit), two banks | 256 (8-bit), per-channel independent |
| Interface Speed | I2C up to 400 kHz | I2C up to 400 kHz | I2C up to 400 kHz | I2C up to 400 kHz |
| Hardware Addresses | 3 pins (up to 8 per bus) | 3 pins (up to 8 per bus) | 3 pins (up to 8 per bus) | 7-bit software address, larger bus |
| Supply Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
Principaux différenciateurs
- Two hardware-programmable PWM banks plus 256 brightness steps (vs PCA9633DPW)
- 25 mA per channel vs 20 mA in PCA9552BS (vs PCA9552BS)
- Three hardware address pins allow simple bus scaling (vs TLC59116 (TI))
Notes de conception
Estimated: at 25 mA per channel driving all 16 LEDs at 5 V supply, total LED current draw is 16 x 25 mA = 400 mA. Add a 10 uF + 0.1 uF decoupling pair on VDD (pin 12) located within 5 mm of the IC. The exposed thermal pad (pin 24) should be soldered to a copper pour of at least 25 mm^2 on the top layer to keep junction temperature rise manageable; without it the package can exceed its thermal budget.
Route SDA and SCL as parallel 50-ohm traces with 5-8 mil spacing, and place the pull-up resistors within 20 mm of the PCA9532BS - 1.5 kohm at 3.3 V or 4.7 kohm at 5 V is typical for 400 kHz Fast-mode with up to 8 devices on the bus. Avoid routing the I2C lines over the exposed pad or near switching nodes on the PCB to prevent capacitive loading that slows the rise time.
Do not source more than 25 mA per pin continuously - exceeding this rating causes the open-drain MOSFET to enter linear operation, dissipating up to (VDD - VLED) x I per pin, and the device has no per-pin current limiting. Use a series resistor sized for the LED forward voltage: R = (VDD - Vf) / 0.020 A (leaving 5 mA margin). Also, avoid crossing the thermal pad with signal traces - it must remain a solid copper pour for rated performance.
Informations de conformité
RoHS and REACH compliance per NXP product page (2026-09). Standard part is NOT AEC-Q100 qualified - consult NXP automotive-grade alternatives for AEC-Q100 needs. Halogen-free status not explicitly confirmed in the cited distributor pages.
