TI TPS92830QPWRQ1

With the trend of better lighting homogeneity, highcurrent 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. The 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.

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 Nchannel iMOSFETs.

• AEC-Q100 Qualified
• Device Temperature Grade 1: -40℃ to 125℃ Ambient Operating Temperature Range
• Device HBM ESD Classification Level H2
• Device CDM ESD Classification Level C4B
• Wide Voltage Input Range From 4.5 V to 40 V
• 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
• 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
• 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)
• Operating Junction Temperature Range: -40℃ to 150℃
• TSSOP 28 Package (PW)

• 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