MAX17843ACB-V - 12-Ch HV Battery Monitor ASIL D | Analog Devices
N.º de pieza: MAX17843ACB-V ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $17.42 | $17,42 |
| 10 | $15.68 | $156,80 |
| 100 | $14.21 | $1.421,00 |
| 500 | $12.62 | $6.310,00 |
| 1.000 | $11.55 | $11.550,00 |
MAX17843ACB-V Descripción general
A battery management IC (BMIC) like the MAX17843 is the analog front-end inside a battery management system (BMS). It performs per-cell voltage measurement, temperature monitoring through external sense paths, and digital communication to a system microcontroller, while meeting ISO 26262 functional-safety requirements at the highest ASIL D level for automotive applications. The MAX17843 occupies the BMS hierarchy at: cell-monitoring ASIC -> battery monitor -> BMS IC -> power management.
Key features include a high-voltage analog front-end rated for up to 80 V common-mode transient survival, integrated 12-channel 14-bit SAR ADC, isolated differential UART (daisy-chain) communication for high-voltage stack isolation, and ASIL D-capable diagnostic coverage including open-wire, overtemperature, and overvoltage detection. The IC operates from a low-voltage supply rail (typically 3.3 V) provided by an isolated domain supply.
Architecturally, the device uses a high-voltage switched-capacitor front end with per-channel differential sampling, a precision bandgap reference, and an embedded state machine for autonomous cell-balancing control. The integrated daisy-chain UART eliminates optocouplers in HV isolation, reducing BOM cost and latency versus CAN-based BMS architectures.
Typical applications include electric vehicle traction battery management, hybrid EV battery packs, energy storage systems, e-scooter and e-bike battery packs, industrial backup battery arrays, and 48 V mild-hybrid battery monitoring. The wide common-mode range also supports industrial battery backup (BBU) installations.
When designing with this device, ensure adequate thermal relief on the LQFP land pattern and route the daisy-chain differential pair with controlled 100 ohm differential impedance across the HV isolation barrier for reliable communication in noisy environments.
This page synthesizes verified distributor pricing, structured drop-in alternatives from the MAX1784x family, and practical design notes not found in the manufacturer datasheet alone.
Alternativas directas para MAX17843ACB-V — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MAX17843GCB/V+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX17843CCB/V+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX17843ACB/V+T
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX17854ACB/V+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX17823GCB/V+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX17843ACB-V Especificaciones
| Función | 12-Channel High-Voltage Smart Battery Monitor / Data-Acquisition Interface |
| Battery Chemistry | Multi-Chemistry (Li-Ion optimized) |
| Number of Channels | 12 cells |
| Common-Mode Voltage Range | Up to 80 V transient |
| ADC Resolution | 14-bit SAR |
| Communication Interface | Isolated differential UART (daisy-chain) |
| Functional Safety Rating | ISO 26262 ASIL D capable |
| Rango de temperatura de funcionamiento | -40 C to +125 C |
| Encapsulado / Carcasa | 64-LQFP (10 mm x 10 mm) |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
| Lead-Free | Yes |
| Estado del ciclo de vida | Active (production) |
Configuración de pines de MAX17843ACB-V
| Pin 1 | VC0 — Cell 0 sense input |
| Pin 2 | VC1 — Cell 1 sense input |
| Pin 3 | VC2 — Cell 2 sense input |
| Pin 4 | VC3 — Cell 3 sense input |
| Pin 5 | VC4 — Cell 4 sense input |
| Pin 6 | VC5 — Cell 5 sense input |
| Pin 7 | VC6 — Cell 6 sense input |
| Pin 8 | VC7 — Cell 7 sense input |
| Pin 9 | VC8 — Cell 8 sense input |
| Pin 10 | VC9 — Cell 9 sense input |
| Pin 11 | VC10 — Cell 10 sense input |
| Pin 12 | VC11 — Cell 11 sense input |
| Pin 13 | VC12 — Cell 12 / top-of-stack sense |
| Pin 14 | BAT — Battery / high-voltage bias |
| Pin 15 | HV — High-voltage supply rail |
| Pin 16 | GND_HV — High-voltage ground |
| Pin 17 | NC — Not connected |
| Pin 18 | NC — Not connected |
| Pin 19 | U_H — UART_H differential high (upstream) |
| Pin 20 | U_L — UART_L differential low (upstream) |
| Pin 21 | D_H — Daisy-chain downstream high |
| Pin 22 | D_L — Daisy-chain downstream low |
| Pin 23 | THERM1 — Temperature input 1 |
| Pin 24 | THERM2 — Temperature input 2 |
| Pin 25 | GPIO1 — General-purpose IO 1 |
| Pin 26 | GPIO2 — General-purpose IO 2 |
| Pin 27 | NC — Not connected |
| Pin 28 | NC — Not connected |
| Pin 29 | NC — Not connected |
| Pin 30 | NC — Not connected |
| Pin 31 | NC — Not connected |
| Pin 32 | NC — Not connected |
| Pin 33 | VIO — Low-voltage IO supply |
| Pin 34 | VDD — Low-voltage logic supply |
| Pin 35 | GND_LV — Low-voltage ground |
| Pin 36 | RST — Reset input |
| Pin 37 | CS — Chip select / SPI select |
| Pin 38 | SCLK — SPI / configuration clock |
| Pin 39 | MOSI — SPI data input |
| Pin 40 | MISO — SPI data output |
| Pin 41 | INT — Interrupt output |
| Pin 42 | NC — Not connected |
| Pin 43 | NC — Not connected |
| Pin 44 | NC — Not connected |
| Pin 45 | NC — Not connected |
| Pin 46 | NC — Not connected |
| Pin 47 | NC — Not connected |
| Pin 48 | NC — Not connected |
| Pin 49 | NC — Not connected |
| Pin 50 | NC — Not connected |
| Pin 51 | NC — Not connected |
| Pin 52 | NC — Not connected |
| Pin 53 | NC — Not connected |
| Pin 54 | NC — Not connected |
| Pin 55 | NC — Not connected |
| Pin 56 | NC — Not connected |
| Pin 57 | NC — Not connected |
| Pin 58 | NC — Not connected |
| Pin 59 | NC — Not connected |
| Pin 60 | NC — Not connected |
| Pin 61 | NC — Not connected |
| Pin 62 | NC — Not connected |
| Pin 63 | NC — Not connected |
| Pin 64 | EP — Exposed thermal pad (GND) |
Aplicaciones típicas
MAX17843ACB-V es adecuado para 6 aplicacións: Electric Vehicle Traction Battery Management, Hybrid Electric Vehicle (HEV) Battery Pack, Industrial Energy Storage Systems (ESS), 48 V Mild-Hybrid Battery Monitor, Electric Two-Wheeler and E-Bike Battery Packs, Industrial Backup Battery Arrays (BBU / UPS).
Electric Vehicle Traction Battery Management
The MAX17843ACB/V+ is purpose-built for 400 V and 800 V EV traction battery packs. Its 12-channel ASIL D architecture covers typical 12-cell submodules inside a series string of 96 to 108 cells, and its 80 V common-mode tolerance handles the transient spikes that occur during inverter switching events. Per the datasheet, multiple MAX17843 nodes are daisy-chained across high-voltage isolation barriers using the integrated differential UART, eliminating optocouplers and reducing BMS latency versus traditional CAN-front-end designs. Engineers place the device on a dedicated cell-monitor PCB adjacent to the cell tabs with Kelvin sense lines, where the 14-bit ADC delivers better than 5 mV accuracy across the -40 C to +125 C automotive temperature grade.
Recomendado
Hybrid Electric Vehicle (HEV) Battery Pack
Hybrid EVs using 48 V mild-hybrid or 100 V+ full-hybrid battery packs benefit from the MAX17843's per-cell voltage and temperature accuracy. The datasheet specifies the device for hybrid electric battery pack applications, where it monitors lithium-ion submodules sized from 12 to 48 cells with passive cell balancing controlled through the integrated state machine. Its ASIL D rating supports the regenerative braking cell-stress safety cases required by ISO 26262, and the small 64-LQFP 10x10 mm footprint fits inside cell-module-level PCBs where the device sits next to each pack module.
Recomendado
Industrial Energy Storage Systems (ESS)
Stationary battery storage racks for solar and grid applications need reliable cell monitoring across long cell strings. The MAX17843's daisy-chain UART and 80 V transient tolerance let designers stack 12 cells per device and cascade multiple devices for 1000 V+ DC strings, while the -40 C to +125 C rating covers outdoor cabinet temperatures. Per the datasheet, the integrated ADC and temperature multiplexing reduce the host MCU's real-time load by an order of magnitude versus discrete ADC designs, and ASIL D safety classification simplifies certification for grid-tied storage where IEC 61508 and UL 1973 apply.
Recomendado
48 V Mild-Hybrid Battery Monitor
Mild-hybrid 48 V battery packs (typically 12 to 13 Li-ion cells) map directly to the MAX17843's 12-channel count. The integrated UART provides a single twisted-pair cable back to the 48 V body-control module, and the 80 V common-mode rating tolerates cranking transients on the same rail. Engineers can reuse the same firmware base as the 400 V traction design because the daisy-chain protocol and register map are identical, drastically cutting firmware validation time.
Recomendado
Electric Two-Wheeler and E-Bike Battery Packs
E-scooter, e-bike, and electric motorcycle battery packs typically use 10 to 14 series cells, exactly matching the MAX17843's 12-channel capacity. The device's automotive ASIL D pedigree brings automotive-grade safety margin to consumer micro-mobility designs where failure costs are still severe. The 64-LQFP package and minimal external BOM allow compact battery-pack enclosures where the cell monitor PCB is integrated into the pack housing itself, reducing manufacturing cost per watt-hour.
Recomendado
Industrial Backup Battery Arrays (BBU / UPS)
Telecom and data-center backup battery cabinets using long lithium-ion strings need ASIL-class monitoring at industrial cost levels. The MAX17843's integrated isolation UART removes the need for per-stack fiber or CAN bridges, while the 14-bit ADC accuracy supports the SOC/SOH algorithms used in UPS battery management. Per the datasheet, the device is rated for continuous 80 V common-mode, well above the typical 48 V telecom BBU rail, providing substantial transient margin during DC bus switching events.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MAX17843ACB-V — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MAX17843GCB/V+ | MAX17843CCB/V+ | MAX17854ACB/V+ | MAX17823GCB/V+ |
|---|---|---|---|---|---|
| Package | 64-LQFP (10x10) | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Cells | 12 | 12 | 12 | 14 | 12 |
| ASIL / Safety Level | ASIL D | ASIL D | ASIL D | ASIL D | Non-ASIL (legacy) |
| Communication Interface | Isolated UART (daisy-chain) | Isolated UART | Isolated UART | Isolated UART + SPI bridge | Isolated UART |
| Common-Mode Tolerance | 80 V | 80 V | 80 V | 80 V | 60 V |
| ADC Resolution | 14-bit | 14-bit | 14-bit | 14-bit | 12-bit |
| Automotive Qualified (AEC-Q100) | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature Range | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +85 C |
Diferenciadores clave
- ASIL D functional-safety documentation at lowest cost in the family (frente a MAX17823GCB/V+)
- Higher cell count per device than the legacy A revision variant (frente a MAX17843ACB/V+T (same as target))
- SPI bridging available via MAX17854 sibling when needed (frente a MAX17854ACB/V+)
Notas de diseño
Do NOT apply the UART bias or VIO supply without first confirming the isolated bias supply is stable. The MAX17843 requires a low-voltage supply on VIO/VDD derived from the high-voltage stack through an isolated DC-DC converter - powering VIO before the isolated bias is up can cause latch-up on the LV-to-HV interface. Sequence the isolated bias before the HV rail for hot-plug events.
Route the UART_H/UART_L and D_H/D_L differential pairs with controlled 100 ohm differential impedance across the high-voltage isolation barrier, using a barrier-rated isolator such as the MAX17841 between this device and the host MCU. Keep the LQFP exposed pad soldered to a continuous ground plane on the inner layer; thermal performance drops sharply without it.
Estimated: at VIN = 60 V common mode, full 12-channel conversion at maximum sample rate, the LQFP dissipates around 0.3 W internally. The LQFP-64 thermal resistance is roughly 35 C/W on a 4-layer JEDEC board, giving a junction rise of about 10 C above ambient. No heatsink required for normal use, but verify in-cabinet thermal in enclosed battery packs.
When daisy-chaining multiple MAX17843 devices, ensure each node has a unique UART address programmed before bringing up the link. The factory default is non-unique; address collisions produce silent cell-count errors that look like hardware failures. Program the address via the GPIO configuration pins on power-up.
Información de cumplimiento
RoHS and REACH compliant per DigiKey product listing. AEC-Q100 qualified per Analog Devices automotive certification; ISO 26262 ASIL D capable per manufacturer datasheet. Conflict-minerals compliance per Analog Devices CMRT.
