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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Special Purpose Regulators

Texas Instruments EMB1499QMHE/NOPB

Name: EMB1499QMHE/NOPB
Brand: Texas Instruments
SKU: EMB1499QMHE/NOPB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: EMB1499QMHE/NOPB

Manufacturer:: Texas Instruments

Category:: Special Purpose Regulators

Package:: 28-PowerTSSOP (0.173", 4.40mm Width)

Datasheet:: EMB1499QMHE/NOPB.pdf

Description:: IC REG CTRLR 1OUT 28HTSSOP

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Product details

Overview

EMB1499QMHE/NOPB from Texas Instruments is an automotive-grade bidirectional current DC-DC controller IC designed for active cell balancing in high-voltage battery stacks. It delivers fully synchronous PWM control of a forward converter with 250-kHz fixed switching frequency, bidirectional balancing current regulation via VSET-adjustable reference (1–2.2 V), and integrated fault protection including dual UVLO, OVP/UVP on CELLPLUS (0–6 V range), primary/secondary current limiting (132 mV / 136 mV thresholds), thermal shutdown (165°C), and watchdog timeout (8 s). It operates in Li-ion BMS applications up to 56 V stack differential.

For engineers reviewing the EMB1499QMHE/NOPB datasheet, EMB1499QMHE/NOPB pinout, EMB1499QMHE/NOPB application, or EMB1499QMHE/NOPB equivalent, key selection considerations include its dual-domain 12-V supply architecture (VINA/VINP referenced to GND, VINF/PVINF referenced to GNDF), three independent gate drivers (GATE_LS, GATE_HS1, GATE_HS2), active clamp timing signal (PWM_CLAMP), and AEC-Q100 Grade 1 qualification (−40°C to +125°C).

Technical Context

The EMB1499QMHE/NOPB implements peak current mode control with artificial ramp compensation to suppress subharmonic oscillation. Its controller core regulates inductor current by comparing sensed secondary-side current (VSENSE_HS) against a VSET-derived reference voltage, with polarity inversion synchronized to DIR input to enable bidirectional energy flow between cell and stack.

It features two isolated voltage domains: a lower domain (GNDA/GNDP-referenced) hosting logic, fault encoding, and primary-side driver (GATE_LS); and an upper domain (GNDF-referenced) powering secondary-side drivers (GATE_HS1/GATE_HS2) and sensing circuitry. Level-shifting interfaces between domains ensure safe signal transfer across up to 56 V potential difference.

Key Specifications

Parameter	Value and Actual Design Meaning
Switching Frequency	250 kHz ±20 kHz - fixed-frequency operation ensures predictable EMI profile and simplifies filter design for battery balancing converters.
Max Stack Voltage	56 V - defines maximum allowable differential between top-cell negative and stack bottom, enabling use in 13–14S Li-ion packs.
VSET Range	1.0 V to 2.2 V - sets balancing current magnitude; factory-trimmed at 2.0 V for optimal accuracy (±10 mV VSENSE_HS error).
Current Limit Thresholds	Primary: 132 mV; Secondary: 136 mV - precise sense-resistor-based overcurrent protection with separate fault latching per domain.
OVP/UVP Range	OVP rising: 5.5 V; UVP falling: 0.74 V - programmable cell voltage window detection directly on CELLPLUS pin for per-cell fault isolation.
Watchdog Timeout	8 s - hard limit on continuous balancing duration; requires microcontroller re-assertion of EN to prevent uncontrolled energy transfer.
Operating Junction Temp	−40°C to +125°C - AEC-Q100 Grade 1 qualification confirms suitability for under-hood automotive BMS environments.

Pinout & Package

EMB1499QMHE/NOPB is housed in a 28-pin HTSSOP (PWP) package with exposed thermal pad, optimized for high-density battery management PCB layouts and thermal dissipation in automotive modules.

Pin/Terminal	Circuit Role	Design Meaning
VSENSE_HS	Secondary-side current sense input	Connects to transformer-side of secondary sense resistor; enables bidirectional current regulation with polarity inversion based on DIR state.
CELLPLUS	Cell voltage sense for OVP/UVP	Directly monitors top of cell being charged/discharged; triggers fault if voltage exceeds 5.5 V (OVP) or falls below 0.74 V (UVP).
EN	Enable input from EMB1428	Rising edge initiates soft-start sequence and clears DONE/FAULT latches; falling edge commands controlled current ramp-down and shutdown.
DIR	Direction control input	High = charge mode (stack → cell); Low = discharge mode (cell → stack); determines PWM timing assignment and current polarity.
GATE_LS	Primary-side MOSFET gate driver	Drives low-side FET on non-floating side of forward converter; R_ON = 3.6 Ω (pull-up), 1.1 Ω (pull-down) at 100 mA load.
GATE_HS1 / GATE_HS2	Secondary-side MOSFET gate drivers	Drive high-side FETs on floating side; each has R_ON = 7 Ω (pull-up), 1.1 Ω (pull-down); support switch matrix routing to individual cells.
PWM_CLAMP	Active clamp timing signal	Controls external primary-side active clamp FET driver; requires external RC delay network to align turn-on timing with main switching waveform.
DONE / FAULT[0:2]	Handshake and fault status outputs	DONE latches high after current ramp-down; FAULT[2:0] encodes six fault types (e.g., 110 = OVP) for system MCU readback via EMB1428 interface.

Key Features

Feature	Design Value
Bidirectional balancing current control	Enables energy transfer both from stack to cell (charge) and cell to stack (discharge) using single forward converter topology, reducing component count vs. dual-converter schemes.
Fully synchronous operation	Eliminates body-diode conduction losses in secondary-side FETs during freewheeling, improving efficiency and thermal performance in high-current balancing.
Dual isolated power domains	Separate 12-V supplies (VINA/VINP and VINF/PVINF) referenced to GNDA/GNDP and GNDF respectively support safe operation across 56 V stack differential without optocouplers.
Integrated multi-fault protection	Combines OVP/UVP on CELLPLUS, dual current limiting (primary/secondary), thermal shutdown (165°C), watchdog timeout (8 s), and UVLO on both supply rails into single-cycle fault response.
AEC-Q100 Grade 1 qualification	Validated for automotive use across −40°C to +125°C junction temperature, including stress testing for humidity, vibration, and ESD (±2 kV HBM).

Applications

Electric Vehicle Battery Packs	Hybrid Powertrain BMS
Use Scenario: Balancing 13–14 series Li-ion cells in traction battery packs to maintain SOC uniformity across 400–600 V systems. IC Role / Device Role / Timing Role: Bidirectional DC-DC controller regulating inductor current in isolated forward converter; synchronizes GATE_LS, GATE_HS1, GATE_HS2, and PWM_CLAMP signals at 250 kHz to channel energy between selected cell and stack. Use Value: Enables <1% cell-to-cell voltage deviation after repeated cycles, extending pack lifetime and maximizing usable capacity by preventing overcharge/overdischarge of weak cells.	Use Scenario: Active balancing in 48–96 V mild-hybrid 48 V battery systems supporting regenerative braking and start-stop functions. IC Role / Device Role / Timing Role: Core timing and gate drive controller interfacing with EMB1428 switch matrix to route balancing current to specific cells during engine-off periods or low-load conditions. Use Value: Achieves <2 A balancing current with <5% regulation error across temperature, allowing rapid correction of imbalances accumulated during high-power transients.
Grid-Scale Energy Storage	Industrial UPS Battery Systems
Use Scenario: Maintaining voltage consistency across large-format LFP or NMC battery strings in stationary storage cabinets operating at 50–60 V per string. IC Role / Device Role / Timing Role: High-reliability balancing controller with watchdog timer and dual UVLO ensuring fail-safe shutdown during grid instability or communication loss. Use Value: Prevents thermal runaway propagation by detecting and isolating overvoltage/undervoltage events on individual cells within 100 µs of threshold crossing.	Use Scenario: Precision balancing in mission-critical uninterruptible power supplies where battery runtime must be maximized and failure modes rigorously controlled. IC Role / Device Role / Timing Role: Fault-tolerant controller providing three-bit encoded fault reporting (FAULT[2:0]) to host MCU, enabling root-cause diagnostics without interrupting adjacent balancing channels. Use Value: Reduces mean time to repair (MTTR) by identifying exact fault type (e.g., FAULT = 101 = UVP) and location, avoiding full-system reset or manual cell inspection.

Electric Vehicle Battery Packs

Hybrid Powertrain BMS

Use Scenario: Balancing 13–14 series Li-ion cells in traction battery packs to maintain SOC uniformity across 400–600 V systems.

IC Role / Device Role / Timing Role: Bidirectional DC-DC controller regulating inductor current in isolated forward converter; synchronizes GATE_LS, GATE_HS1, GATE_HS2, and PWM_CLAMP signals at 250 kHz to channel energy between selected cell and stack.

Use Value: Enables <1% cell-to-cell voltage deviation after repeated cycles, extending pack lifetime and maximizing usable capacity by preventing overcharge/overdischarge of weak cells.

Use Scenario: Active balancing in 48–96 V mild-hybrid 48 V battery systems supporting regenerative braking and start-stop functions.

IC Role / Device Role / Timing Role: Core timing and gate drive controller interfacing with EMB1428 switch matrix to route balancing current to specific cells during engine-off periods or low-load conditions.

Use Value: Achieves <2 A balancing current with <5% regulation error across temperature, allowing rapid correction of imbalances accumulated during high-power transients.

Grid-Scale Energy Storage

Industrial UPS Battery Systems

Use Scenario: Maintaining voltage consistency across large-format LFP or NMC battery strings in stationary storage cabinets operating at 50–60 V per string.

IC Role / Device Role / Timing Role: High-reliability balancing controller with watchdog timer and dual UVLO ensuring fail-safe shutdown during grid instability or communication loss.

Use Value: Prevents thermal runaway propagation by detecting and isolating overvoltage/undervoltage events on individual cells within 100 µs of threshold crossing.

Use Scenario: Precision balancing in mission-critical uninterruptible power supplies where battery runtime must be maximized and failure modes rigorously controlled.

IC Role / Device Role / Timing Role: Fault-tolerant controller providing three-bit encoded fault reporting (FAULT[2:0]) to host MCU, enabling root-cause diagnostics without interrupting adjacent balancing channels.

Use Value: Reduces mean time to repair (MTTR) by identifying exact fault type (e.g., FAULT = 101 = UVP) and location, avoiding full-system reset or manual cell inspection.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional DC-DC controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM5170QMH/NOPB	Single-ended current-mode controller with integrated current sense amplifiers; supports up to 65 V input but lacks native bidirectional current regulation or CELLPLUS OVP/UVP monitoring.	Requires external direction logic and discrete cell voltage monitoring; suited for non-battery-specific isolated DC-DC designs.	Select when designing custom balancing topologies with external FET drivers and independent fault management.
TPS40303DRCT	Synchronous buck controller with 2.2-MHz switching; no isolation support, no floating domain supplies, and no built-in cell-level OVP/UVP or watchdog timer.	Limited to low-voltage (<16 V) unidirectional step-down applications; not qualified for automotive or high-reliability BMS use.	Choose only for cost-sensitive, non-automotive, low-power auxiliary supply generation-not for active cell balancing.

Compared with LM5170QMH/NOPB and TPS40303DRCT, the EMB1499QMHE/NOPB uniquely integrates cell-specific voltage monitoring (CELLPLUS), dual-domain gate driving, and automotive-grade fault handling-making it the only option that eliminates external comparators, level shifters, and watchdog circuits in AEC-Q100-compliant BMS designs.

Availability

EMB1499QMHE/NOPB is available at Aetrix Electronics and suitable for electric vehicle battery packs, hybrid powertrain BMS, and grid-scale energy storage systems requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability.

Supply support for EMB1499QMHE/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with deep expertise in automotive electronics and battery management solutions.

The EMB1499QMHE/NOPB belongs to TI's active cell balancing controller product line, engineered specifically for high-efficiency, fault-resilient energy transfer between individual Li-ion cells and battery stacks in automotive and industrial applications.

FAQ

What is the function of the DIR pin on the EMB1499QMHE/NOPB?

The DIR pin on the EMB1499QMHE/NOPB determines the direction of balancing current flow: a logic-high signal configures the controller for charge mode (energy transfer from battery stack to selected cell), while logic-low enables discharge mode (energy transfer from cell to stack). The EMB1499QMHE/NOPB internally reassigns PWM timing and inverts current-sense polarity based on DIR state to maintain regulation in both directions.

How does the EMB1499QMHE/NOPB implement cell voltage monitoring?

The EMB1499QMHE/NOPB monitors cell voltage directly via the CELLPLUS pin, which connects to the top terminal of the cell undergoing balancing. It compares this voltage against internal OVP (5.5 V rising) and UVP (0.74 V falling) thresholds; violation triggers immediate shutdown and asserts a corresponding code on FAULT[2:0]. This dedicated sensing path eliminates need for external ADC or comparator circuits.

What is the purpose of the PWM_CLAMP signal in the EMB1499QMHE/NOPB?

The PWM_CLAMP signal on the EMB1499QMHE/NOPB provides timing control for an external primary-side active clamp FET driver. It ensures proper dead-time alignment between main switching and clamp action to minimize voltage spikes and recover leakage energy. An external RC delay network must be added to the PWM_CLAMP output to achieve optimal timing relative to GATE_LS transitions.

Can the EMB1499QMHE/NOPB operate without the EMB1428 gate driver IC?

No-the EMB1499QMHE/NOPB is designed exclusively to work with the EMB1428 switch matrix gate driver IC. The EMB1499QMHE/NOPB relies on EMB1428 for EN assertion, DIR handshaking via DIR_RT, fault acknowledgment, and coordination of the 12-FET switch matrix. Standalone operation is not supported; the two ICs form a tightly coupled control pair for TI's active balancing architecture.

What are the supply voltage requirements for the EMB1499QMHE/NOPB?

The EMB1499QMHE/NOPB requires two independent 12-V supplies: VINA/VINP (10–14 V, referenced to GNDA/GNDP) powers the lower-domain logic and primary-side driver, while VINF/PVINF (10–14 V, referenced to GNDF) powers the upper-domain drivers and floating circuitry. Both supplies must exceed their respective UVLO thresholds (10.8 V rising) before the IC enables internal rails and gate drivers.

EMB1499QMHE/NOPB Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 28-PowerTSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Applications:: Controller, Active Cell Balancing

Voltage - Input:: 10V ~ 56V

Number of Outputs:: 1

Voltage - Output:: -

Operating Temperature:: -40°C ~ 125°C

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: 28-HTSSOP

EMB1499QMHE/NOPB FAQ

1.How can I place an order for EMB1499QMHE/NOPB through Aetrix?

Please submit a Request for Quotation (RFQ) for EMB1499QMHE/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for EMB1499QMHE/NOPB reliable?

The price and inventory of EMB1499QMHE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EMB1499QMHE/NOPB is usually 5 days.

3.What payment methods are accepted for EMB1499QMHE/NOPB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EMB1499QMHE/NOPB transactions.

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4.How is shipping managed for EMB1499QMHE/NOPB?

EMB1499QMHE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your EMB1499QMHE/NOPB order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for EMB1499QMHE/NOPB?

For technical support, including EMB1499QMHE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EMB1499QMHE/NOPB requirements.

6.How does Aetrix verify that EMB1499QMHE/NOPB is sourced from the original manufacturer or authorized distributors?

All EMB1499QMHE/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that EMB1499QMHE/NOPB meets industry standards.

7.What is the process for return or replacement of EMB1499QMHE/NOPB?

All EMB1499QMHE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with EMB1499QMHE/NOPB, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The EMB1499QMHE/NOPB part is unused and in its original packaging.

Return procedure for EMB1499QMHE/NOPB:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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