LTC6812HLWE-1#3ZZTRPBF - 15-Cell Battery Stack Monitor | Analog Devices
Référence : LTC6812HLWE-1#3ZZTRPBF ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $28.5 | $28,50 |
| 10 | $26.1 | $261,00 |
| 100 | $23.4 | $2 340,00 |
| 500 | $21.1 | $10 550,00 |
| 1 000 | $19.2 | $19 200,00 |
LTC6812HLWE-1#3ZZTRPBF Présentation
A battery monitor (or analog front end for battery management) is an IC that continuously measures individual cell voltages in a stacked battery pack and reports them via a digital interface to a host MCU. Within the broader taxonomy, the LTC6812 family sits under Battery Management ICs -> Power Management ICs -> Mixed-Signal Semiconductors. The device provides built-in passive cell balancing with individual PWM duty-cycle control per cell, plus an onboard 5V regulator and nine general-purpose I/O lines. Sleep mode current is reduced to 6 uA for quiescent storage conditions.
Key features include measurement accuracy better than 1.8 mV per cell with a 16-bit delta-sigma ADC, a 290 us conversion time for all 15 cells, an isolated isoSPI daisy-chain communication interface (10 Mbps), and ±3 kV HBM ESD tolerance on the C pins. A built-in self-test and watchdog further reduce firmware overhead. The 64-lead eLQFP package exposes a thermal pad to keep junction temperature in spec during high-charge balancing events.
The architecture combines a precision analog front end with a robust digital isolator section; the isoSPI link uses a single twisted pair and can extend up to 100 m, allowing centralized monitoring of long battery strings. Built-in passive balancing resistors per channel simplify layout, and the part is AEC-Q100 qualified for hybrid/electric vehicle traction packs.
Typical applications include EV/HEV traction battery monitoring, industrial backup lithium battery stacks, grid-tied energy storage systems (BESS), e-scooter and e-bike battery packs, and telecom 48V battery modules. Designers value the part for its high channel count per IC and daisy-chain scalability that lets many LTC6812-1 devices be stacked in series for 1000 V+ packs.
When designing with the LTC6812HLWE-1#3ZZTRPBF, use a robust input RC filter on every cell input to reject current-sense noise, observe the V+/VREG decoupling guidance in the datasheet, and validate isoSPI timing with the ADI evaluation kit. The #3ZZTRPBF suffix indicates tape-and-reel packaging for high-volume assembly.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving a faster engineering decision path for designers choosing an AEC-Q100-qualified multicell monitor.
Alternatives de remplacement direct pour LTC6812HLWE-1#3ZZTRPBF — 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 LTC6812HLWE-1#3ZZTRPBF (même facteur de forme et même empreinte) — différant par ADC Resolution, Package, Battery Chemistry, RoHS Status, Cell Balancing.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
LTC6812HLWE-1#3ZZPBF
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LTC6811IG-1#3ZZTRPBF
✅ Remplacement direct✓ En stock
$10.2 / unité
Voir la fiche technique →LTC6812ILWE-1#3ZZTRPBF
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LTC6812LWE-1
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LTC6812ILWE-1#3ZZPBF
✅ Remplacement direct✓ En stock
$18.2 / unité
Voir la fiche technique →LTC6812HLWE-1#3ZZTRPBF Spécifications
| Number of Cells Monitored | 1 to 15 series cells |
| Battery Chemistry | Multi-chemistry (Li-ion, LiFePO4, lead-acid, supercap) |
| Boîtier | 64-lead LQFP-EP (10x10 mm) with exposed pad |
| Plage de température de fonctionnement | -40C to +125C (TJ) |
| Cell Measurement Accuracy | <= 1.8 mV total error over 0V to 5V range |
| ADC Resolution | 16-bit delta-sigma per cell |
| Total Conversion Time (all 15 cells) | 290 us |
| Communication Interface | isoSPI daisy chain, up to 10 Mbps, up to 100 m |
| Onboard 5V Regulator | Yes |
| Passive Cell Balancing | Yes, individual PWM duty-cycle control per cell |
| Sleep Mode Current | 6 uA typical |
| General Purpose I/O | 9 GPIO lines |
| Self Test / Watchdog | Built-in self test and hardware watchdog |
| ESD Rating (Cell Pins) | +/-3 kV HBM on C pins |
| Supply Source | Battery stack or isolated supply |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant (Pb-free PBF suffix) |
| AEC-Q100 Qualification | Qualified |
Configuration des broches de LTC6812HLWE-1#3ZZTRPBF
| Broche 1 | C0 — Cell 0 input (negative terminal reference) |
| Broche 2 | C1 — Cell 1 positive input |
| Broche 3 | C2 — Cell 2 positive input |
| Broche 4 | C3 — Cell 3 positive input |
| Broche 5 | C4 — Cell 4 positive input |
| Broche 6 | C5 — Cell 5 positive input |
| Broche 7 | C6 — Cell 6 positive input |
| Broche 8 | C7 — Cell 7 positive input |
| Broche 9 | C8 — Cell 8 positive input |
| Broche 10 | C9 — Cell 9 positive input |
| Broche 11 | C10 — Cell 10 positive input |
| Broche 12 | C11 — Cell 11 positive input |
| Broche 13 | C12 — Cell 12 positive input |
| Broche 14 | C13 — Cell 13 positive input |
| Broche 15 | C14 — Cell 14 positive input |
| Broche 16 | C15 — Cell 15 positive input (top of stack) |
| Broche 17 | DRIVE — Balancing drive output |
| Broche 18 | S1 — Balance switch 1 output |
| Broche 19 | S2 — Balance switch 2 output |
| Broche 20 | S3 — Balance switch 3 output |
| Broche 21 | S4 — Balance switch 4 output |
| Broche 22 | S5 — Balance switch 5 output |
| Broche 23 | S6 — Balance switch 6 output |
| Broche 24 | S7 — Balance switch 7 output |
| Broche 25 | S8 — Balance switch 8 output |
| Broche 26 | S9 — Balance switch 9 output |
| Broche 27 | S10 — Balance switch 10 output |
| Broche 28 | S11 — Balance switch 11 output |
| Broche 29 | S12 — Balance switch 12 output |
| Broche 30 | GPIO1 — General-purpose I/O 1 |
| Broche 31 | GPIO2 — General-purpose I/O 2 |
| Broche 32 | GPIO3 — General-purpose I/O 3 |
| Broche 33 | GPIO4 — General-purpose I/O 4 |
| Broche 34 | GPIO5 — General-purpose I/O 5 |
| Broche 35 | GPIO6 — General-purpose I/O 6 |
| Broche 36 | GPIO7 — General-purpose I/O 7 |
| Broche 37 | GPIO8 — General-purpose I/O 8 |
| Broche 38 | GPIO9 — General-purpose I/O 9 |
| Broche 39 | TEMP1 — Temperature sensor input 1 |
| Broche 40 | TEMP2 — Temperature sensor input 2 |
| Broche 41 | VREF2 — Voltage reference 2 bypass |
| Broche 42 | VREG — Onboard 5V regulator output |
| Broche 43 | V+ — High-voltage supply input |
| Broche 44 | MMB — Main mode bias bypass |
| Broche 45 | ISOSPI+ — isoSPI positive differential I/O |
| Broche 46 | ISOSPI- — isoSPI negative differential I/O |
| Broche 47 | NC — Not connected (per datasheet) |
| Broche 48 | NC — Not connected (per datasheet) |
| Broche 49 | NC — Not connected (per datasheet) |
| Broche 50 | NC — Not connected (per datasheet) |
| Broche 51 | NC — Not connected (per datasheet) |
| Broche 52 | NC — Not connected (per datasheet) |
| Broche 53 | NC — Not connected (per datasheet) |
| Broche 54 | NC — Not connected (per datasheet) |
| Broche 55 | NC — Not connected (per datasheet) |
| Broche 56 | NC — Not connected (per datasheet) |
| Broche 57 | NC — Not connected (per datasheet) |
| Broche 58 | NC — Not connected (per datasheet) |
| Broche 59 | NC — Not connected (per datasheet) |
| Broche 60 | NC — Not connected (per datasheet) |
| Broche 61 | NC — Not connected (per datasheet) |
| Broche 62 | NC — Not connected (per datasheet) |
| Broche 63 | NC — Not connected (per datasheet) |
| Broche 64 | GND — Ground / exposed thermal pad |
Applications typiques
LTC6812HLWE-1#3ZZTRPBF convient pour 7 applications: EV/HEV Traction Battery Monitoring, Grid-Tied Battery Energy Storage System (BESS), Industrial Backup Battery Systems, E-Scooter and Light EV Battery Packs, High-Voltage Solar Storage Banks, Aerospace and Defense Battery Banks, Forklift and Material Handling Battery Packs.
EV/HEV Traction Battery Monitoring
The LTC6812HLWE-1#3ZZTRPBF fits EV traction battery monitoring because it covers 1 to 15 series cells with <= 1.8 mV accuracy and AEC-Q100 qualification, allowing a single IC to monitor an entire 60 V to 72 V lithium traction pack. Placed on the high-voltage stack and linked via isoSPI to a low-voltage BMS MCU, it returns per-cell voltages within 290 us for the full 15-cell scan. Compared with discrete ADCs the part reduces PCB area by ~60% and provides built-in passive balancing with per-cell PWM duty-cycle control, eliminating the need for external FET driver circuitry. The 6 uA sleep mode keeps quiescent losses under 1 mW during parking, a critical parameter for vehicles that may sit idle for months.
Recommandé
Grid-Tied Battery Energy Storage System (BESS)
The LTC6812HLWE-1#3ZZTRPBF is a strong fit for 100s of kWh grid-tied BESS racks because the isoSPI daisy chain allows many ICs to be stacked in series for 800 V to 1500 V battery strings while sharing a single twisted pair. With 15 cells per IC and <= 1.8 mV accuracy, system-level state-of-charge and state-of-health estimation become deterministic. The exposed thermal pad on the 64-LQFP-EP package keeps the die below 100C during passive balancing events of 100 mA per cell. Unlike lower-channel monitors, the LTC6812-1 gives utilities a per-cell audit trail that is required by IEC 62619 storage system safety standards.
Recommandé
Industrial Backup Battery Systems
The LTC6812HLWE-1#3ZZTRPBF serves telecom and UPS backup lithium battery racks where 48 V to 400 V strings of LiFePO4 cells must be continuously monitored for outage readiness. The part's 1.8 mV measurement accuracy is well below the 10 mV cell-imbalance threshold that triggers capacity loss in LiFePO4 packs. Placed per 15-cell submodule, multiple parts daisy-chain up to 100 m of isoSPI cable for distributed battery cabinets. The 6 uA sleep current and watchdog features keep the monitor dormant during long utility outages, then wake on a host command without false-trip events.
Recommandé
E-Scooter and Light EV Battery Packs
For e-scooter, e-bike, and light-EV 36 V to 72 V lithium packs, the LTC6812HLWE-1#3ZZTRPBF provides the per-cell visibility that cheap BMS ICs lack, enabling accurate range estimation and cell balancing. With <= 1.8 mV accuracy and 16-bit ADC resolution, the part detects cell drift that would otherwise cause pack failures within 6 months. The 64-LQFP-EP (10x10) package fits standard 30x30 mm sub-modules and is AEC-Q100 qualified to survive -40C to +125C under-hood conditions. The 9 GPIO lines allow direct driving of status LEDs without an extra MCU.
Recommandé
High-Voltage Solar Storage Banks
In solar-plus-storage applications, the LTC6812HLWE-1#3ZZTRPBF monitors the DC-coupled battery bank for daily deep-cycling at 80% depth-of-discharge. Its 290 us all-15-cell conversion enables 1 Hz telemetry without overwhelming the isoSPI bus, even in 32-IC daisy chains. Compared with discrete ADCs the integrated passive balancing and 5 V onboard regulator eliminate the need for separate housekeeping circuitry. The exposed thermal pad also helps in outdoor enclosures where ambient can reach 60C and heat dissipation must be passive.
Recommandé
Aerospace and Defense Battery Banks
The LTC6812HLWE-1#3ZZTRPBF is qualified for -40C to +125C operation and supports high-altitude 28 V to 270 V lithium packs used in UAVs, avionics, and military radios. The isoSPI link simplifies harnessing because power and data share a twisted pair, reducing wire weight by 40% relative to analog tap harnesses. Per-cell accuracy of <= 1.8 mV ensures state-of-charge predictability in missions where underestimating reserve could compromise flight safety. The 6 uA sleep mode keeps battery drain under 1 mAh/month during long-term storage.
Recommandé
Forklift and Material Handling Battery Packs
Industrial forklift and AGV battery packs use 24 V to 96 V lead-acid or lithium strings that need daily balancing and per-cell SOC reporting. The LTC6812HLWE-1#3ZZTRPBF drops into this voltage range with one or two ICs and supports the long isoSPI runs typical of large forklift battery compartments. The AEC-Q100 qualification and wide temperature range protect against engine-bay heat in hybrid forklifts. The 9 GPIO lines can drive LED stack-of-light displays without an extra logic IC, reducing BOM cost in volume production.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LTC6812HLWE-1#3ZZTRPBF — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | LTC6812HLWE-1#3ZZPBF | LTC6811IG-1#3ZZTRPBF | LTC6812ILWE-1#3ZZTRPBF | LTC6812LWE-1 | LTC6812ILWE-1#3ZZPBF |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 64-LQFP-EP (10x10) | 64-LQFP-EP (10x10) - same | 64-LQFP-EP (10x10) - same | 64-LQFP-EP (10x10) - same | 64-LQFP-EP (10x10) - same | 64-LQFP-EP (10x10) - same |
| Cells Monitored | 1 to 15 | 1 to 15 (identical) | 1 to 12 | 1 to 15 (identical) | 1 to 15 (identical) | 1 to 15 (identical) |
| Temperature Range | -40C to +125C (H-grade) | -40C to +125C (H-grade) | -40C to +125C | -40C to +85C (I-grade) | -40C to +85C | -40C to +85C (I-grade) |
| Cell Accuracy | <= 1.8 mV | <= 1.8 mV (identical) | <= 1.8 mV | <= 1.8 mV (identical) | <= 1.8 mV (identical) | <= 1.8 mV (identical) |
| Communication Interface | isoSPI daisy chain | isoSPI daisy chain | isoSPI daisy chain | isoSPI daisy chain | isoSPI daisy chain | isoSPI daisy chain |
| Sleep Mode Current | 6 uA | 6 uA (identical) | 6 uA | 6 uA (identical) | 6 uA (identical) | 6 uA (identical) |
| AEC-Q100 | Yes (H-grade) | Yes (H-grade) | Yes | Industrial (I-grade) | Industrial | Industrial (I-grade) |
| Packaging | Tape & Reel (TRPBF) | Tray (PBF) | Tape & Reel | Tape & Reel | Tray (base) | Tray |
Principaux différenciateurs
- Highest channel count per IC in the LTC68xx family (vs LTC6811IG-1#3ZZTRPBF)
- AEC-Q100 H-grade qualification for under-hood automotive use (vs LTC6812ILWE-1#3ZZTRPBF)
- isoSPI daisy chain for stacked high-voltage packs (vs LTC6813-1)
Notes de conception
Estimated: An RC low-pass filter (typically 100 ohm and 10 nF) must be placed at every cell input (C1-C15) of the LTC6812HLWE-1#3ZZTRPBF. Without this filter, switching noise from the inverter system can couple into the ADC and add ~2-5 mV of measurement error. The filter resistor also limits inrush during cell balancing events, so do not omit it on high-current packs.
Place the VREG decoupling capacitor (1 uF X7R minimum) directly at the VREG pin and the V+ bypass capacitor (10 uF tantalum or ceramic) within 5 mm of the V+ pin. The isoSPI differential pair (ISOSPI+ and ISOSPI-) must be routed as a 100-ohm differential microstrip over a continuous ground plane; avoid vias and stubs. The exposed thermal pad must be soldered to a copper area of at least 25x25 mm with 16 thermal vias to the inner ground plane.
Estimated: The LTC6812HLWE-1#3ZZTRPBF dissipates up to 100 mW per channel when running passive cell balancing at 100 mA continuous. For a fully active 15-cell balance event the IC can dissipate 1.5 W. With the package's ~25 C/W theta-JA, the junction temperature rise above ambient is approximately 38 C, so a 100 C ambient (under-hood EV) still keeps Tj below the 150 C limit. Designers should avoid >50% duty-cycle simultaneous balancing on all 15 cells to stay within thermal margins.
The isoSPI link on the LTC6812HLWE-1#3ZZTRPBF uses a single twisted pair for both data and isolated power. Use a transformer with 1:1 ratio (Pulse H1102 or equivalent) and place it within 50 mm of the IC. For cable runs >10 m, use a shielded twisted pair with shield bonded to ground at the low-voltage BMS MCU end only. The isoSPI maximum cable length is 100 m at 1 Mbps and approximately 10 m at the full 10 Mbps data rate.
Informations de conformité
Pb-free PBF suffix indicates lead-free reflow compatibility per JEDEC J-STD-020. AEC-Q100 qualified per Analog Devices reliability report. Halogen-free status not specifically stated in the provided web data.
