Dual channel constant-Voltage and constant current controller with SPI

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.