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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

Infineon Technologies BTS5590G

Name: BTS5590G
Brand: Infineon Technologies
SKU: BTS5590G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BTS5590G

Manufacturer:: Infineon Technologies

Category:: LED Drivers

Package:: 36-BSSOP (0.295", 7.50mm Width)

Datasheet:: BTS5590G.pdf

Description:: PERIPHERAL DRIVER, 5 DRIVER

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BTS5590G from Infineon Technologies is a five-channel automotive high-side smart power switch in P-DSO-36 package, designed for 12 V grounded loads in exterior lighting control. It supports configurable bulb/LED mode per channel, features integrated watchdog timer (capacitor-adjustable), SPI daisy-chain interface (1 MHz max), and multiplexed proportional current sense with k_ILIS configuration. Used in rear fog light, CHMSL, parking light, and indicator circuits.

For engineers reviewing the BTS5590G datasheet, BTS5590G pinout, BTS5590G application, or BTS5590G equivalent, key selection criteria include channel-specific R_DS(on) values (25–100 mΩ), limp-home activation via LHI pin, thermal latch shutdown, reverse battery protection with external components, and SPI-configurable LED/bulb diagnosis accuracy.

Technical Context

The BTS5590G integrates five independent high-side switches with dedicated gate drivers, charge pump, and clamping circuitry for inductive load handling. Each channel includes programmable current limitation, temperature sensing, and loss-of-ground detection - all monitored and controlled via an 8-bit SPI interface supporting daisy-chain topology.

Its application-specific architecture enables dual-mode operation: bulb mode uses fixed k_ILIS for 21 W/27 W filaments, while LED mode configures k_ILIS for fast diagnosis (<2% duty cycle at 100 Hz) and optimized switching transients. The integrated watchdog timer (external capacitor-timed) and two-bit trigger state machine provide fail-safe activation paths.

Key Specifications

Parameter	Value and Actual Design Meaning
V_BB Operating Range	4.5 V to 28 V - supports cold-crank (4.5 V) and load-dump (28 V) conditions in 12 V automotive systems
R_DS(on) Max (Ch1, Ch4)	25 mΩ - enables low-power dissipation for high-current loads like CHMSL or rear fog light
R_DS(on) Max (Ch0, Ch2)	100 mΩ - optimized for lower-current indicators and license plate lights
SPI Clock Frequency	1 MHz - ensures robust communication under EMI stress without requiring high-speed MCU peripherals
Current Sense Ratio	Configurable k_ILIS - enables accurate load current feedback for both filament bulbs and LEDs across full dynamic range
Limp-Home Input (LHI)	Dedicated pin with fail-safe activation - forces defined output state during system fault or microcontroller reset
Watchdog Timer	Capacitor-adjustable timeout - provides hardware-level supervision of SPI communication integrity

Pinout & Package

P-DSO-36 package: 36-pin thermally enhanced exposed-pad SOIC variant, RoHS-compliant, designed for automotive PCB mounting with high thermal reliability and EMC robustness.

Pin/Terminal	Circuit Role	Design Meaning
V_BB	Main power supply input	Connects to 12 V battery rail; supports up to 28 V transient; feeds internal charge pump and drivers
V_DD	Logic supply input	3.8–5.5 V supply for SPI interface and logic core; decoupled externally for noise immunity
IN0–IN4	Parallel PWM enable inputs	CMOS-compatible direct drive for each channel; allows bypassing SPI for basic on/off or PWM dimming
OUT0–OUT4	High-side switched outputs	Five independent load connections; each with integrated clamp diode and current sense path
SCLK, SI, SO, CS	SPI bus interface	Full-duplex 8-bit SPI with daisy-chain capability; SO connects to SI of next device in chain
IS	Multiplexed current sense output	Analog voltage proportional to selected channel's load current; routed via internal MUX to single pin
LHI	Limp-home activation input	Active-low pin that forces safe output state (e.g., ON/OFF per configuration) during MCU failure
LHO, LHEN	Limp-home status outputs	Indicate active limp-home condition and enable status for system-level fault reporting

Key Features

Feature	Design Value
Configurable LED/Bulb Mode	Per-channel k_ILIS selection enables optimal current sense scaling and fast LED diagnosis (<2% duty cycle @ 100 Hz)
Capacitor-Programmable Watchdog	External capacitor sets timeout period - eliminates need for MCU-based watchdog timing in safety-critical lighting
Thermal Shutdown with Latch	Halts all channels on overtemperature and holds state until SPI reset - prevents uncontrolled restart during thermal stress
Multiplexed Current Sense	Single IS pin delivers proportional analog signal for any selected channel - reduces BOM count and PCB routing complexity
Daisy-Chain SPI Interface	SO-to-SI cascading allows control/diagnosis of multiple BTS5590G devices using only four MCU pins

Applications

Rear Fog Light Control

CHMSL (Center High-Mount Stop Light)

Use Scenario: Driving in low-visibility conditions requiring immediate, high-intensity illumination with fail-safe activation.

IC Role / Device Role / Timing Role: High-side switch controlling 25 mΩ-rated channel (Ch1 or Ch4); activated via SPI or parallel INx pin with limp-home fallback.

Use Value: 25 mΩ R_DS(on) minimizes power loss at 2–3 A typical load; integrated clamp handles inductive kickback from relay coils or LED drivers.

Use Scenario: Brake signal-driven illumination with strict response time requirements and thermal cycling durability.

IC Role / Device Role / Timing Role: High-side driver for 25 mΩ channel (Ch1 or Ch4); configured in LED mode for fast diagnosis and precise current regulation.

Use Value: Configurable k_ILIS and <2% duty-cycle diagnosis ensure reliable open-wire detection across LED array aging and temperature drift.

Parking Light Management

Indicator (Turn Signal) Control

Use Scenario: Continuous low-power illumination for vehicle identification during dusk or parking, requiring stable current and thermal margin.

IC Role / Device Role / Timing Role: High-side switch for 100 mΩ channel (Ch0 or Ch2); operated in bulb mode with fixed k_ILIS for 5–10 W filament loads.

Use Value: 100 mΩ R_DS(on) balances conduction loss and silicon area for cost-sensitive, low-current applications with minimal heatsinking.

Use Scenario: Rapidly pulsed load (1–2 Hz flash rate) demanding accurate short-duration current measurement and thermal resilience.

IC Role / Device Role / Timing Role: High-side driver for 100 mΩ channel (Ch0 or Ch2); uses LED mode for sub-millisecond current sense response and watchdog supervision.

Use Value: Fast diagnosis (<2% duty cycle @ 100 Hz) enables real-time open/short detection during flash intervals without missing faults.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side smart power switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BTS5576G	No watchdog timer; same R_DS(on) profile (25/90/100 mΩ); 2 MHz SPI support	Lacks capacitor-programmable watchdog; suitable where MCU handles supervision	Select when higher SPI speed (2 MHz) is required and hardware watchdog is not mandated by ASIL level
BTS5566G	No LED mode support; no watchdog; fixed k_ILIS; 2 MHz SPI	Restricted to bulb-only loads; no fast LED diagnosis or configurable current sense	Choose for cost-optimized bulb-only tail-light modules without LED compatibility requirements

Compared with BTS5576G and BTS5566G, the BTS5590G uniquely combines configurable LED/bulb operation, capacitor-timed watchdog, and limp-home activation - making it the only SPOC variant qualified for mixed-load, safety-aware automotive lighting with autonomous fault recovery.

Availability

BTS5590G is available at Aetrix Electronics and suitable for rear fog light control, CHMSL activation, parking light management, and indicator (turn signal) circuits requiring stable component supply across automotive production lifecycles.

Supply support for BTS5590G 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

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and security solutions, with global R&D and manufacturing infrastructure.

The SPOC (Smart Power Octal/Quintuple) product line targets automotive exterior lighting control, integrating diagnostics, protection, and mixed-load adaptability into single-package high-side switches.

FAQ

What is the function of the LHI pin on BTS5590G?

The LHI (Limp-Home Input) pin is an active-low hardware fault-handling signal. When asserted, it forces predefined output states across all channels - such as holding critical lights ON - independent of SPI or MCU status. This ensures fail-operational behavior during microcontroller lockup or communication loss, meeting ASIL-B functional safety expectations for lighting systems.

How does the configurable k_ILIS improve LED versus bulb operation?

The k_ILIS current sense ratio is programmable via SPI to match nominal load types: fixed scaling for 21 W/27 W bulbs ensures accurate open-wire detection at steady state, while LED mode enables dynamic scaling for fast transient response. This allows sub-2% duty-cycle diagnosis at 100 Hz - detecting LED string opens within one flash cycle - without sacrificing accuracy on filament loads.

Can BTS5590G be used without SPI communication?

Yes. Parallel CMOS-compatible IN0–IN4 pins allow direct PWM or static on/off control of each channel without SPI involvement. SPI remains optional for configuration, diagnosis, and advanced features like watchdog setup or k_ILIS selection. This dual-control architecture supports both simple legacy integration and full-featured diagnostic systems.

What thermal protection mechanisms does BTS5590G implement?

BTS5590G integrates a temperature sensor with thermal shutdown that latches off all channels upon exceeding safe junction temperature. Recovery requires explicit SPI command or power cycle - preventing automatic restart during overheating. Combined with R_DS(on)-based power loss calculation and package-level thermal resistance (P-DSO-36), this ensures robust operation under sustained 3 A loads at 85°C ambient.

BTS5590G Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 36-BSSOP (0.295", 7.50mm Width)

Packaging:: Bulk

Product Status:: Active

Type:: -

Topology:: -

Internal Switch(s):: -

Number of Outputs:: 5

Voltage - Supply (Min):: -

Voltage - Supply (Max):: -

Voltage - Output:: -

Current - Output / Channel:: -

Frequency:: -

Dimming:: -

Applications:: -

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-DSO-36-34

BTS5590G FAQ

1.How can I place an order for BTS5590G through Aetrix?

Please submit a Request for Quotation (RFQ) for BTS5590G 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 BTS5590G reliable?

The price and inventory of BTS5590G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTS5590G is usually 5 days.

3.What payment methods are accepted for BTS5590G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTS5590G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BTS5590G?

BTS5590G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BTS5590G 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 BTS5590G?

For technical support, including BTS5590G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTS5590G requirements.

6.How does Aetrix verify that BTS5590G is sourced from the original manufacturer or authorized distributors?

All BTS5590G 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 BTS5590G meets industry standards.

7.What is the process for return or replacement of BTS5590G?

All BTS5590G units undergo pre-shipment inspection (PSI). If there is an issue with BTS5590G, 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 BTS5590G part is unused and in its original packaging.

Return procedure for BTS5590G:

1.Submit a request within 90 days.

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

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