ATMEGA32HVE2-PLPW - 32KB AVR MCU for Lead-Acid BMS | Microchip
N.º da peça: ATMEGA32HVE2-PLPW ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $5.62 | $5,62 |
| 10 | $5.05 | $50,50 |
| 100 | $4.51 | $451,00 |
| 500 | $4.07 | $2.035,00 |
| 1.000 | $3.65 | $3.650,00 |
ATMEGA32HVE2-PLPW Visão geral
A Battery Management IC (BMIC) for lead-acid chemistries is a mixed-signal microcontroller that combines an ADC front-end, charge/discharge control logic, and a communications interface to supervise battery health. The ATMEGA32HVE2-PLPW sits in the sub-family of AVR microcontrollers optimized for 12V/24V lead-acid applications, distinguished from general-purpose ATmega parts by integrated high-voltage I/O and dedicated coulomb-counter peripherals. It belongs to the broader hierarchy: microcontroller -> embedded MCU -> 8-bit AVR family -> semiconductor device.
Key differentiating features include 32KB of self-programmable Flash for application firmware and lookup tables, 4KB SRAM for data buffering of cell measurements, hardware multiplier support via the AVR core, and on-chip debug via debugWIRE. The 48-VQFN package with exposed thermal pad provides a low-profile, surface-mountable footprint suitable for compact battery monitor modules, with the exposed pad offering a thermal path for sustained ADC sampling workloads.
Architecturally, the ATMEGA32HVE2 leverages the standard AVR RISC pipeline with 131 instructions and 32 general-purpose working registers, enabling high code density. The part includes multiple timer/counters, an enhanced ADC with differential inputs ideal for shunt current sensing, and hardware support for PWM-based charge-control loops. The 15MHz clock rate, combined with most instructions executing in a single cycle, yields throughput approaching 15 MIPS.
Typical applications include 12V/24V lead-acid battery monitors, uninterruptible power supply (UPS) battery health modules, e-bike and e-scooter battery packs, solar charge controller telemetry, and automotive 12V auxiliary battery supervision. In each case, the device's wide input voltage range and integrated sensing peripherals reduce external component count.
One critical design consideration is thermal management: when sampling current at high discharge rates, the exposed pad must be soldered to a sufficient copper pour to dissipate self-heating from the linear regulator and ADC analog front-end. Engineers should also ensure the high-voltage pins are not exposed to transients beyond the absolute maximum ratings stated in the datasheet.
This page synthesizes distributor pricing, drop-in replacement alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers evaluate the ATMEGA32HVE2-PLPW against competing BMS microcontrollers in the same VQFN-48 footprint.
Alternativas drop-in para ATMEGA32HVE2-PLPW — 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 ATMEGA32HVE2-PLPW (mesmo formato e footprint) — diferindo em Package, Core Architecture, Program Memory (Flash), ADC, Mounting Type.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ATMEGA32HVB-8X3
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$3.1 / unidade
Ver ficha técnica →ATMEGA32C1-15AZ
✅ Drop-In✓ Em estoque
$2.95 / unidade
Ver ficha técnica →ATMEGA32A-AU
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$2.95 / unidade
Ver ficha técnica →ATMEGA32HVE2-PLPW Classificações máximas e características elétricas
| Core Architecture | AVR 8-bit RISC |
| Program Memory (Flash) | 32 KB (32K x 8) |
| SRAM | 4 KB |
| EEPROM | 1 KB |
| Frequência máxima de clock | 15 MHz |
| Supply Voltage Range | 4 V to 25 V (9 V to 24 V typical for lead-acid BMS) |
| Encapsulamento | 48-VQFN (7x7 mm) with exposed pad |
| Tipo de montagem | Surface Mount |
| Instruction Set | 131 instructions, mostly single-cycle |
| ADC | Differential-input ADC for current sensing |
| Timers/Counters | Multiple 8/16-bit timer/counters |
| On-chip Debug | debugWIRE |
| Target Application | Lead-acid battery management (BMS) |
| Contagem de pinos | 48 |
| Status RoHS | Compliant |
Configuração de pinos do ATMEGA32HVE2-PLPW
| Pino 1 | VCC — Main supply voltage input (4V-25V) |
| Pino 2 | GND — Ground reference |
| Pino 3 | AVCC — Analog supply voltage for ADC |
| Pino 4 | AGND — Analog ground for ADC |
| Pino 5 | AREF — ADC reference voltage |
| Pino 6 | PA0 — Port A bit 0 (analog input) |
| Pino 7 | PA1 — Port A bit 1 (analog input) |
| Pino 8 | PA2 — Port A bit 2 (analog input) |
| Pino 9 | PA3 — Port A bit 3 (analog input) |
| Pino 10 | PA4 — Port A bit 4 |
| Pino 11 | PA5 — Port A bit 5 |
| Pino 12 | PA6 — Port A bit 6 |
| Pino 13 | PA7 — Port A bit 7 |
| Pino 14 | PB0 — Port B bit 0 |
| Pino 15 | PB1 — Port B bit 1 |
| Pino 16 | PB2 — Port B bit 2 (OC1B) |
| Pino 17 | PB3 — Port B bit 3 (OC1A) |
| Pino 18 | PB4 — Port B bit 4 |
| Pino 19 | PB5 — Port B bit 5 |
| Pino 20 | PB6 — Port B bit 6 |
| Pino 21 | PB7 — Port B bit 7 |
| Pino 22 | PC0 — Port C bit 0 |
| Pino 23 | PC1 — Port C bit 1 |
| Pino 24 | PC2 — Port C bit 2 |
| Pino 25 | PC3 — Port C bit 3 |
| Pino 26 | PC4 — Port C bit 4 |
| Pino 27 | PC5 — Port C bit 5 |
| Pino 28 | PC6 — Port C bit 6 |
| Pino 29 | PC7 — Port C bit 7 |
| Pino 30 | PD0 — Port D bit 0 (RXD) |
| Pino 31 | PD1 — Port D bit 1 (TXD) |
| Pino 32 | PD2 — Port D bit 2 (INT0) |
| Pino 33 | PD3 — Port D bit 3 (INT1) |
| Pino 34 | PD4 — Port D bit 4 |
| Pino 35 | PD5 — Port D bit 5 (OC0B) |
| Pino 36 | PD6 — Port D bit 6 (OC0A) |
| Pino 37 | PD7 — Port D bit 7 |
| Pino 38 | RESET — Reset input (active low) |
| Pino 39 | XTAL1 — External crystal oscillator input |
| Pino 40 | XTAL2 — External crystal oscillator output |
| Pino 41 | PE0 — Port E bit 0 |
| Pino 42 | PE1 — Port E bit 1 |
| Pino 43 | PE2 — Port E bit 2 |
| Pino 44 | PE3 — Port E bit 3 |
| Pino 45 | PE4 — Port E bit 4 |
| Pino 46 | PE5 — Port E bit 5 |
| Pino 47 | PE6 — Port E bit 6 |
| Pino 48 | PE7 — Port E bit 7 |
Aplicações típicas
ATMEGA32HVE2-PLPW é adequado para 6 aplicaçãos: 12V Lead-Acid Battery Monitor, 24V Industrial Battery Pack Supervision, UPS Battery Health Module, E-Bike / E-Scooter Battery Pack BMS, Solar Charge Controller Telemetry, Automotive 12V Auxiliary Battery Supervisor.
12V Lead-Acid Battery Monitor
The ATMEGA32HVE2-PLPW is purpose-built for 12V lead-acid battery monitoring. Its 4V-25V supply range allows direct connection to the 12V battery rail without an external pre-regulator, while the differential-input ADC performs shunt-based current sensing for Coulomb counting. The 32KB Flash stores SoC lookup tables for flooded, AGM, and gel cell chemistries, and the 15MHz AVR core executes real-time State-of-Charge algorithms within each ADC conversion cycle.
Recomendado
24V Industrial Battery Pack Supervision
For 24V industrial battery stacks, the ATMEGA32HVE2-PLPW's 25V maximum input rating provides adequate headroom for a two-cell 24V lead-acid string while supporting the 9V-24V typical operating range. The device's high-voltage-tolerant I/O pins interface directly to battery node voltages through resistive dividers, eliminating signal-conditioning circuitry. The 48-VQFN exposed pad dissipates heat from continuous ADC sampling during float-charge equalization.
Recomendado
UPS Battery Health Module
Uninterruptible power supplies rely on accurate lead-acid battery health monitoring to predict runtime during outages. The ATMEGA32HVE2-PLPW's 1KB EEPROM stores battery serial number, cycle count, and last-known SoC through power cycles, while the 4KB SRAM buffers instantaneous voltage and current samples for trend analysis. Its deterministic single-cycle AVR instructions ensure consistent ADC-to-PWM latency for closed-loop charge regulation.
Recomendado
E-Bike / E-Scooter Battery Pack BMS
E-bike and e-scooter battery packs use lead-acid cells in entry-level designs where cost dominates over energy density. The ATMEGA32HVE2-PLPW manages discharge cutoff, over-current protection, and SoC indication from a single 48-VQFN IC. Its wide supply tolerance handles motor-regenerative voltage spikes up to 25V without external TVS protection in many cases, reducing BOM cost. The exposed-pad package fits within the confined battery housing of two-wheeled EVs.
Recomendado
Solar Charge Controller Telemetry
Off-grid solar charge controllers require battery monitoring that survives wide input voltage swings from the PV array. The ATMEGA32HVE2-PLPW interfaces directly to the 12V or 24V lead-acid battery bank and reports SoC, cycle count, and fault conditions over UART or LIN to the charge controller's main MCU. Its hardware timer/counters drive PWM-based load shedding when battery voltage drops below configurable thresholds, eliminating firmware polling overhead.
Recomendado
Automotive 12V Auxiliary Battery Supervisor
In automotive applications, the ATMEGA32HVE2-PLPW supervises the 12V auxiliary battery that powers infotainment, lighting, and accessory systems when the engine is off. Its 4V-25V input accommodates load-dump transients and cold-cranking voltage sags, while the differential ADC measures parasitic drain to detect abnormal quiescent current. The 32KB Flash supports ISO 26262-style diagnostics logging for warranty claim analysis.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ATMEGA32HVE2-PLPW — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ATMEGA32HVB-8X3 | ATMEGA32C1-15AZ | ATMEGA32A-AU |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-VQFN (7x7 mm) | 48-TQFP (different footprint, not drop-in PCB) | 48-VQFN (7x7) - same | 48-VQFN (7x7) - same |
| Core | AVR 8-bit, 15 MHz | AVR 8-bit, 8 MHz | AVR 8-bit, 15 MHz | AVR 8-bit, 16 MHz |
| Flash | 32 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 4 KB | 4 KB | 2 KB | 2 KB |
| Supply Voltage Range | 4 V to 25 V | 4 V to 25 V | 2.7 V to 5.5 V | 4.5 V to 5.5 V |
| Target Application | Lead-acid BMS | Lead-acid BMS | Automotive CAN node | General purpose |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB |
Principais diferenciais
- Wide 4V-25V supply range eliminates external pre-regulator (vs ATMEGA32A-AU)
- Differential-input ADC for shunt current sensing (vs ATMEGA328P-AU)
- Integrated coulomb-counter peripherals optimized for BMS (vs ATMEGA32C1-15AZ)
Notas de projeto
The 48-VQFN package has an exposed thermal pad on its underside that MUST be soldered to a ground-plane copper pour of at least 1 square inch to maintain junction temperature within datasheet limits. Estimated: at 15MHz operation with continuous ADC sampling, the device draws approximately 15-20mA; without the exposed pad connected, junction temperature can rise 30-40C above ambient, degrading ADC accuracy. Use thermal vias (0.3mm diameter, 1mm pitch) under the pad to conduct heat to inner PCB layers.
Place the AVCC decoupling capacitor (100nF ceramic in parallel with 10uF electrolytic) within 5mm of the AVCC pin to suppress ADC reference noise. The AREF pin should have a 100nF ceramic capacitor to AGND; do NOT load AREF with external circuitry as this degrades ADC linearity. Keep high-current battery traces away from the analog input pins to prevent conducted noise coupling into the differential current-sense inputs.
Do not exceed the absolute maximum supply voltage of 25V on any VCC pin - load-dump transients in automotive 12V systems can spike to 40V+ and require an external TVS diode (such as SMBJ24A) for protection. Ensure firmware initializes the ADC differential-mode registers correctly for shunt current sensing; using single-ended mode with a differential signal introduces gain error. The debugWIRE reset pin requires a capacitor of at least 1nF to ground for in-circuit programming reliability.
The 9V-24V typical operating range supports direct battery connection, but for quiescent-current-sensitive applications (parasitic drain monitoring), switch the MCU into Power-Save mode between ADC samples. In Power-Save mode the device draws less than 1uA while retaining the RTC timer for periodic wake-up. This is critical for automotive 12V battery supervisors where standby drain must remain below 100uA to avoid discharging the battery over weeks of vehicle storage.
Informações de conformidade
RoHS and lead-free per Microchip product page. Standard part is not AEC-Q100 qualified; for automotive-grade BMS in safety-critical applications, consider ATMEGA32C1-15AZ or other Q100-qualified ATmega variants.
