TPS92682-Q1 Texas instruments

TPS92682-Q1

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TPS92682-Q1

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Описание

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.

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

Number of channels	2
Topology	Boost Controller, Buck Controller, Buck-Boost Controller, Cuk Controller, Flyback Controller, SEPIC Controller
Rating	Automotive
TI functional safety category	Functional Safety-Capable
Operating temperature range (°C)	-40 to 125
Vin (min) (V)	4.5
Vin (max) (V)	65
Vout (min) (V)	3
Vout (max) (V)	65
Iout (max) (A)	5
Iq (typ) (mA)	2.2
Switching frequency (max) (kHz)	1000
Features	Adjustable Switch Frequency, Fault Detection, Fault Diagnostic, LED Open Detection, LED Short to Ground Detection, Spread Spectrum, Synchronization Pin, Thermal shutdown