TPS92830-Q1 3-Channel High-Current Linear LED Controller

Texas Instruments' TPS92830-Q1 is an automotive 3-channel high-side high-power constant-current linear LED driver

Image of Texas Instruments' TPS92830-Q1 3-Channel High-Current Linear LED ControllerTexas Instruments' TPS92830-Q1 device is an advanced automotive-grade high-side constant-current linear LED controller for delivering high current using external N-channel MOSFETs. The device has a full set of features for automotive applications and is compatible with a wide selection of N-channel MOSFETs. With the trend of better lighting homogeneity, high-current LEDs are often used in automotive front and rear lamps with lighting diffusers and light-guides. Meanwhile, in order to meet strict EMC and reliability requirements, linear LED drivers are popular in automotive applications. However, it is a challenge to deliver high current for linear LED drivers with integrated power transistors. These devices help meet that challenge.

Each channel of the TPS92830-Q1 device sets the channel current independently by the sense-resistor value. An internal precision constant-current regulation loop senses the channel current by the voltage across the sense resistor and controls the gate voltage of the N-channel MOSFET accordingly. The device also integrates a two-stage charge pump for low-dropout operation. The charge-pump voltage is high enough to support a wide selection of N-channel MOSFETs. PWM dimming allows multiple sources for flexibility internal PWM generator, external PWM inputs, or power supply dimming. Various diagnostics and protection features specially designed for automotive applications help improve system robustness and ease of use. A one-fails-all-fail fault bus supports TPS92830-Q1 operation together with the TPS92630-Q1, TPS92638-Q1, and TPS9261x-Q1 family to fulfill various fault-handling requirements.

Features
  • AEC-Q100 qualified
    • Device temperature grade 1: -40°C to +125°C ambient operating temperature range
    • Device HBM ESD classification level H2
    • Device CDM ESD classification level C4B
  • High-precision LED driving
    • Precision current regulation with external N-channel MOSFET (2.5% tolerance)
    • 20:1 analog dimming profile with off-board bin resistor support
    • Precision PWM generator with full duty-cycle mask (2% tolerance)
    • Open-drain PWM output for synchronization
  • Wide voltage input range from 4.5 V to 40 V
  • Operating junction temperature range: -40°C to +150°C
  • TSSOP 28 package (PW)
  • Protection and diagnostics
    • Adjustable output current derating for external MOSFET thermal protection
    • Diagnostics for LED-string open circuit or short circuit with auto recovery
    • Diagnostic-enable with adjustable threshold for low-voltage operation
    • Fault bus up to 15 devices, configurable as either one-fails-all-fail or only-failed-channel-off
    • Low quiescent current in fault mode (<0.75 mA per device)
  • 3-channel high-side current driving and sensing
    • Channel-independent current setting
    • Channel-independent PWM inputs
    • PWM dimming via both PWM inputs and power supply
    • Optimized slew rate for EMC
Applications
  • Rear light: tail and stop light, rear turn indicator, fog light, reverse light
  • Front light: position light, daytime running light, front turn indicator, low beam

TPS92830-Q1 3-Channel High-Current Linear LED Controller

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
TPS92830QPWRQ1 datasheet linkLED DRIVERTPS92830QPWRQ1LED DRIVER1996 - Immediate
TPS92830QPWRQ1 product page link
Published: 2017-12-22