Texas Instruments TPS92682-Q1 Peak Current-Mode Controller
Texas Instruments TPS92682-Q1 Dual-Channel Peak Current-Mode Controller is programmable to operate in constant-voltage (CV) or constant-current (CC) modes. In CV mode, the 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 an SPI-programmable 10-bit PWM counter. The optional PDRV gate driver output can drive an external P-Channel series MOSFET.
The Texas Instruments TPS92682-Q1 incorporates an advanced SPI-programmable diagnostic and fault protection mechanism. This mechanism includes 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, which, when pulled high, initiates the limp home (LH) condition. In LH mode, the device uses a separate set of SPI-programmed registers.
Features
- AEC-Q100 grade 1 qualified
- Wide input voltage range: 4.5V to 65V
- ±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 v.s. 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 1MHz Programmable switching frequency with external clock synchronization capability
- Comprehensive programmable fault protection circuitry
- Wettable flank with VQFN package
Applications
- Automotive forward lighting
- Emergency vehicles
- General lighting
Typical Application
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