Peak current-mode controller functions as two independent or dual-phase boost voltage regulators

Texas Instruments TPS92682-Q1 Dual-Channel Peak Current-Mode Controller is programmable to operate in CV or CC modes. In CV mode, the device can be programmed to function as two independent or dual-phase Boost voltage regulators. The output voltage can be programmed utilising an external resistor voltage divider, and a SPI-programmable 8-bit DAC. In CC mode, the device is intended to support dual-channel step-up or step-down LED driver topologies. LED current can be separately modulated utilising analog or PWM dimming techniques. Analog dimming with over 28:1 range is achieved employing a programmable 8-bit DAC. PWM dimming of LED current is delivered either by directly modulating the PWM input pins with the wanted duty cycle, or utilising a SPI-programmable 10-bit PWM counter. The optional PDRV gate driver output can be utilised to drive an external P-Channel series MOSFET.

The device includes an advanced SPI-programmable diagnostic and fault protection mechanism. This mechanism comprises cycle-by-cycle current limit, output overvoltage and undervoltage protection, ILED overcurrent protection, and thermal warning. The device also incorporates an open-drain fault indicator output per channel. The device incorporates an LH pin, when pulled high, initiates the limp home (LH) condition. In LH mode, the device utilises a separate set of SPI-programmed registers.