MCZ33812AEK - Multifunctional Ignition/Injector Driver | NXP
N.º da peça: MCZ33812AEK ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $7.45 | $7,45 |
| 10 | $6.78 | $67,80 |
| 100 | $5.92 | $592,00 |
| 500 | $5.2 | $2.600,00 |
| 1.000 | $4.65 | $4.650,00 |
MCZ33812AEK Visão geral
An ignition/injector driver IC is a specialized power-management semiconductor that sits between an ECU microcontroller and the high-current electromechanical actuators of an internal combustion engine. By integrating the low-side switches, pre-regulator, and watchdog into one die, it replaces several discrete MOSFETs, regulators, and reset supervisors, reducing PCB footprint, improving reliability under thermal cycling, and providing a single SPI-mapped control surface for the MCU.
Key features include a 5.0 V ±2% internal pre-regulator capable of supplying the MCU core, three low-side FET drivers rated at typical 1.0 A continuous with fly-back-current handling, a pre-driver capable of driving an external IGBT for the ignition coil, an adjustable watchdog timer for MCU supervision, and a K-Line transceiver for OBD-II diagnostic communication. The device operates across the full automotive battery range, supports crank-down and load-dump transients, and is qualified to AEC-Q100 Grade 1 for under-hood deployment.
Typical applications show step-change deployment in small-displacement motorcycle EFI systems, single-cylinder scooter ECUs, ATV and powersports engine controllers, small stationary engine controllers for generators or lawn equipment, and auxiliary two-wheeler body controllers where K-Line diagnostics and ignition drive are combined. The exposed pad (EP) package allows direct soldering to a copper ground pour for heatsinking of the internal low-side drivers.
When designing with this device, follow the manufacturer reference layout for the exposed pad thermal land pattern, keep the K-Line trace away from the injector PWM edges, and provide adequate copper area on GND for the high di/dt low-side return currents. Decouple VCC close to the IC with at least 100 nF plus 10 uF of low-ESR ceramic capacitance.
Alternativas drop-in para MCZ33812AEK — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com MCZ33812AEK (mesmo formato e footprint) — diferindo em Low-Side Driver Current, Operating Temperature, Package.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
MCZ33812EK
✅ Drop-In✓ Em estoque
$4.5 / unidade
Ver ficha técnica →MCZ33812AEK/R2
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC33812EK
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MCZ33812AEFR2
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MCZ33996EKR2
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MCZ33812AEK Classificações máximas e características elétricas
| Função | Multifunctional Ignition and Injector Driver IC |
| Topologia | 3 Low-Side Drivers + 1 Pre-Driver + 5V Pre-Regulator + K-Line |
| Internal Pre-Regulator | +5.0 V ±2% for MCU supply |
| Low-Side Driver Current | 1.0 A typical continuous per channel |
| Pre-Driver | External IGBT gate driver for ignition coil |
| Communication Interface | SPI (control) + K-Line / ISO 9141 (diagnostics) |
| Watchdog Timer | Integrated MCU supervisor with windowed watchdog |
| Supply Voltage Range | 4.5 V to 36 V load-dump tolerant |
| Temperatura de operação | -40 C to +125 C (AEC-Q100 Grade 1) |
| Encapsulamento | 32-SOIC-EP (HSSOP with exposed pad) |
| Tipo de montagem | Surface Mount |
| Contagem de pinos | 32 |
| Automotive Qualification | AEC-Q100 Grade 1 |
| Nível MSL | 3 (per JEDEC J-STD-020) |
| Lead-Free / RoHS | Lead-Free, RoHS Compliant |
| Diagnostic Compliance | ISO 9141 / K-Line OBD-II compatible |
Configuração de pinos do MCZ33812AEK
| Pino 1 | VBAT — Battery supply input (4.5 V to 36 V, load-dump tolerant) |
| Pino 2 | VCC5V — Regulated 5.0 V ±2% MCU supply output |
| Pino 3 | GND — Ground reference |
| Pino 4 | INJ1 — Low-side driver 1 output (1.0 A typical, injector 1) |
| Pino 5 | INJ2 — Low-side driver 2 output (1.0 A typical, injector 2) |
| Pino 6 | INJ3 — Low-side driver 3 output (1.0 A typical, idle / pump) |
| Pino 7 | IGBT — External IGBT gate pre-driver output for ignition coil |
| Pino 8 | CS — SPI chip select (active low) |
| Pino 9 | SCLK — SPI clock input (up to 4 MHz) |
| Pino 10 | MOSI — SPI master-out slave-in data |
| Pino 11 | MISO — SPI master-in slave-out data |
| Pino 12 | WD_EN — Watchdog enable / window configuration |
| Pino 13 | WD_OUT — Watchdog output to MCU reset |
| Pino 14 | KLIN — K-Line ISO 9141 diagnostic transceiver |
| Pino 15 | FAULT — Open-drain fault indicator output |
| Pino 16 | NC — Not connected (per datasheet) |
| Pino 17 | NC — Not connected (per datasheet) |
| Pino 18 | SENSE1 — Current sense input for driver diagnostics |
| Pino 19 | SENSE2 — Current sense input for driver diagnostics |
| Pino 20 | TEMP — Internal temperature sense output |
| Pino 21 | VSUP — Protected supply for low-side drivers |
| Pino 22 | VSUP — Protected supply for low-side drivers (pin tie to VSUP) |
| Pino 23 | PGND — Power ground for low-side drivers |
| Pino 24 | PGND — Power ground for low-side drivers (pin tie to PGND) |
| Pino 25 | RESET — Reset output to MCU |
| Pino 26 | TEST — Factory test pin (leave open or GND in production) |
| Pino 27 | NC — Not connected (per datasheet) |
| Pino 28 | NC — Not connected (per datasheet) |
| Pino 29 | A0 — SPI address / mode select |
| Pino 30 | A1 — SPI address / mode select |
| Pino 31 | NC — Not connected (per datasheet) |
| Pino 32 | EP — Exposed pad - thermal dissipation and ground (must be soldered) |
Aplicações típicas
MCZ33812AEK é adequado para 7 aplicaçãos: Motorcycle Single-Cylinder EFI ECU, Dual-Cylinder Powersports Engine Controller, Small Stationary Engine EFI (Generators/Pumps), ATV and Off-Road Powersports ECU, Scooter and Moped EFI Controller, Two-Stroke Outboard Marine Engine ECU, Small RC Engine Kill-Switch Controller.
Motorcycle Single-Cylinder EFI ECU
The MCZ33812AEK is purpose-built for single-cylinder motorcycle EFI engine control, replacing discrete MOSFETs and the 5 V LDO with one AEC-Q100 Grade 1 qualified IC. Its 1.0 A low-side drivers directly switch the fuel injector and idle-speed stepper, while the integrated IGBT pre-driver fires the ignition coil through an external IGBT - eliminating two driver stages and a separate gate driver IC. The internal 5.0 V ±2% pre-regulator supplies the ECU MCU directly from VBAT, and the windowed watchdog catches MCU lock-ups during engine cranking transients. K-Line ISO 9141 transceiver supports OBD-II diagnostics for road-legal motorcycles. Reference design: NXP AN4760 small-engine EFI reference ECU.
Recomendado
Dual-Cylinder Powersports Engine Controller
For V-twin and parallel-twin motorcycle engines, the MCZ33812AEK's three low-side drivers cover two fuel injectors plus an idle air control valve, while the IGBT pre-driver fires the dual-spark ignition coil - all from one chip. The exposed pad (HSSOP-32) package handles the combined thermal load (3 x 1 A injectors + 2 A IGBT pre-driver dissipation) when soldered to at least 1 square inch of 2-oz copper pour. AEC-Q100 Grade 1 qualification is mandatory for under-seat or frame-mounted ECU enclosures that see sustained thermal soak. The windowed watchdog prevents erratic fueling if the MCU hangs during wide-open-throttle transients.
Recomendado
Small Stationary Engine EFI (Generators/Pumps)
Small stationary engines in portable generators, water pumps, and construction equipment benefit from the MCZ33812AEK's compact integration when converting carburetor designs to electronic fuel injection for emissions compliance. The +5.0 V pre-regulator eliminates the need for a separate LDO, and the SPI-controlled driver enables simple MCU firmware updates during emissions certification. K-Line IP65 supports service-tool diagnostics for rental fleet maintenance. Operating from 4.5 V to 36 V accommodates cranking transients on 12 V lead-acid starting systems typical of small stationary engines.
Recomendado
ATV and Off-Road Powersports ECU
ATV, UTV, and snowmobile ECUs face extreme vibration and temperature swings (-40 C cold-start to +125 C summer soak) that demand AEC-Q100 Grade 1 components like the MCZ33812AEK. Its three low-side drivers handle fuel injector + fuel pump relay + MIL lamp drive, while the IGBT pre-driver fires a CDI-type ignition coil. The watchdog ensures the MCU recovers if vibration-induced soft faults occur. HSSOP-32 with exposed pad improves solder-joint reliability under repeated thermal cycling between -30 C trail conditions and engine-bay heat soak.
Recomendado
Scooter and Moped EFI Controller
For 50cc to 250cc scooter and moped EFI systems where PCB space is at a premium (typical ECU 5 x 5 cm), the MCZ33812AEK's integration of three low-side drivers, IGBT pre-driver, 5V LDO, watchdog, and K-Line into one 32-SOIC-EP package replaces 6-8 discrete components. The exposed pad provides heatsinking for the injector current without a separate heatsink, reducing BOM cost. AEC-Q100 Grade 1 ensures reliability in enclosed under-seat mounting locations that can reach 100 C ambient in tropical climates. SPI interface simplifies PCB layout versus parallel-controlled discretes.
Recomendado
Two-Stroke Outboard Marine Engine ECU
In small two-stroke outboard marine engines, the MCZ33812AEK drives the low-side injector, the ignition IGBT pre-driver, and the choke heater, with one low-side spare for tachometer signal buffering. The 4.5 V to 36 V supply range handles the 12 V marine electrical system's load-dump and reverse-battery transients. AEC-Q100 Grade 1 plus MSL-3 moisture sensitivity suits the marine environment's humidity exposure. K-Line OBD-II supports NMEA-style marine diagnostics adapters, although marine-specific protocols like NMEA 2000 require an additional CAN transceiver IC.
Recomendado
Small RC Engine Kill-Switch Controller
While most RC ignition is magneto-based, fuel-injected large-scale RC engines and UAV auxiliary power units use the MCZ33812AEK to drive the fuel injector, ignition IGBT, and engine-kill relay from a single IC. The low quiescent current of the integrated 5V pre-regulator suits battery-powered RC systems, and the watchdog ensures the kill-switch fires reliably if the flight controller's firmware hangs. AEC-Q100 Grade 1 handles the high-vibration UAV environment. SPI control enables real-time engine-cutoff on radio link loss.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MCZ33812AEK — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MCZ33812EK | MCZ33812AEK/R2 | MC33812EK | MCZ33996EKR2 |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors (same) | NXP Semiconductors (same) | NXP Semiconductors (same) | NXP Semiconductors (same) |
| Package | 32-SOIC-EP (HSSOP) | 32-SOIC-EP - same | 32-SOIC-EP - same | 32-SOIC-EP - same | 32-SOIC-EP - same |
| Function | Ignition+Injectors+5V LDO+K-Line | Identical functional block | Identical functional block | Identical functional block | 16 low-side switches only (no ignition/K-Line) |
| Low-Side Drivers | 3 x 1.0 A | 3 x 1.0 A | 3 x 1.0 A | 3 x 1.0 A | 16 x 0.5 A |
| Internal Pre-Regulator | +5.0 V ±2% | +5.0 V ±2% | +5.0 V ±2% | +5.0 V ±2% | +5.0 V ±2% |
| AEC-Q100 Grade | Grade 1 (-40 C to +125 C) | Industrial (-40 C to +85 C) | Grade 1 (same) | Industrial | Grade 1 |
| K-Line / OBD-II | Yes (ISO 9141) | Yes (same) | Yes (same) | Yes (same) | No |
| Ignition Pre-Driver | Yes (IGBT gate driver) | Yes (same) | Yes (same) | Yes (same) | No |
| Unit Price (qty 1) | $7.45 | $6.20 | $7.45 | $6.20 | $4.85 |
| SPI Interface | Yes | Yes | Yes | Yes | Yes (different register map) |
Principais diferenciais
- Integrates 6 functions (3 drivers + pre-driver + 5V LDO + K-Line + watchdog) in one IC (vs MCZ33996EKR2)
- AEC-Q100 Grade 1 qualification for under-hood / under-seat ECU mounting (vs MCZ33812EK (industrial variant))
- Dedicated IGBT pre-driver pin (pin 7) for ignition coil switching (vs MCZ33996EKR2)
- Integrated K-Line ISO 9141 transceiver for OBD-II diagnostics (vs Discrete K-Line IC designs)
Notas de projeto
Solder the exposed pad (pin 32) directly to a copper ground pour of at least 1 square inch (645 mm^2) of 2-oz copper. Under full-load conditions (three 1 A injectors plus IGBT pre-driver active), internal dissipation can reach 1.5 W; without the copper pour, the HSSOP-32 thermal resistance of ~35 C/W drives junction temperature above 150 C at 100 C ambient, triggering thermal shutdown. The exposed pad MUST be soldered for production - leave it unsoldered only for prototypes with a clip-on heatsink.
Place 100 nF X7R ceramic + 10 uF X5R ceramic decoupling on the VBAT pin within 3 mm of the IC package, with the 100 nF closest to the pin. Keep the K-Line trace (pin 14) routed away from injector PWM edges (pins 4-6) by at least 5 mm to prevent inductive coupling of K-Line signal. The PGND pins (23, 24) must be tied to the main ground pour with wide traces (>= 0.5 mm) to handle the 3 A peak injector return currents without ground bounce affecting MCU SPI communication.
Do not connect the exposed pad to a thermal-only land - it is also the IC's main ground return. A floating exposed pad causes ground lift, SPI communication failures, and erratic watchdog behavior. Do not exceed 36 V on VBAT even momentarily; the IC is load-dump tolerant to 36 V but sustained overvoltage damages the 5 V regulator. Do not bypass the watchdog configuration SPI registers during firmware bring-up - an unconfigured watchdog can lock out the MCU indefinitely.
Use the internal 5.0 V pre-regulator to power only the ECU MCU and its associated passives (typically < 50 mA total). For added peripherals like CAN transceivers, sensors, or relays, use a separate post-regulator off the +5.0 V rail rather than drawing additional current through the MCZ33812AEK. The internal pre-regulator is sized for MCU core current plus K-Line bias, not for auxiliary loads; overloading it will sag the MCU voltage and trigger brown-out resets.
Series-terminate the SPI bus (MOSI, MISO, SCLK, CS) with 33 ohm resistors near the MCU side, not near the MCZ33812AEK. Keep SPI trace lengths under 50 mm, and route them over a continuous ground plane. The MCZ33812AEK's SPI runs at up to 4 MHz; faster SPI modes require firmware-side validation. Add 10 kohm pull-ups on CS and MISO to prevent floating-line false triggers during engine cranking voltage dips.
Informações de conformidade
AEC-Q100 Grade 1 qualified per NXP MC33812 datasheet. RoHS and REACH compliant per NXP product page. MSL-3 moisture sensitivity per JEDEC J-STD-020.
