TPS92682-Q1

• AEC-Q100 grade 1 qualified
• Functional Safety-Capable
  • Documentation available to aid functional safety system design
• Wide input voltage range: 4.5 V to 65 V
• ± 4% LED current accuracy over –40°C to 150°C junction temperature range
• SPI communication interface
• SPI programmable features:
  • Spread spectrum for improved EMI
  • Soft-start timing
  • ILED current and output voltage settings
  • Current limit, overvoltage, fault-timer
  • Single versus dual phase
  • CV and CC mode configuration
• Dual channel peak-current-mode (PCM) controller
• Low input offset rail-to-rail current sense amplifier
• Analog dimming
• External series FET PWM dimming with integrated P-channel driver interface
  • Over 1000:1 PWM dimming range
• Open-drain fault flag indicator per channel
• Up to 1-MHz programmable switching frequency with external clock synchronization capability
• Comprehensive programmable fault protection circuitry
• Wettable flank with VQFN package

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The TPS92682-Q1 is a dual-channel, peak current-mode controller with SPI communication interface. The device is programmable to operate in constant-voltage (CV) or constant-current (CC) modes.

In CV mode, TPS92682-Q1 can be programmed to operate as two independent or dual-phase Boost voltage regulators. The output voltage can be programmed using an external resistor voltage divider, and a SPI-programmable 8-bit DAC.

In CC mode, the device is designed to support dual channel step-up or step-down LED driver topologies. LED current can be independently modulated using analog or PWM dimming techniques. Analog dimming with over 28:1 range is obtained using a programmable 8-bit DAC. PWM dimming of LED current is achieved either by directly modulating the PWM input pins with the desired duty cycle, or using a SPI-programmable 10-bit PWM counter. The optional PDRV gate driver output can be used to drive an external P-Channel series MOSFET.

The TPS92682-Q1 incorporates an advanced SPI-programmable diagnostic and fault protection mechanism including: cycle-by-cycle current limit, output overvoltage and undervoltage protection, ILED overcurrent protection, and thermal warning. The device also includes an open-drain fault indicator output per channel.

The TPS92682-Q1 includes an LH pin, when pulled high, initiates the limp home (LH) condition. In LH mode, the device uses a separate set of SPI-programmed registers.