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Features for the TPS92692-Q1 Wide Input Voltage: 4.5 V to 65 V Better than ± 4% LED Current Accuracy over –40°C to 150°C Junction Temperature Range Spread Spectrum Frequency Modulation for Improved EMI Comprehensive Fault Protection Circuitry with Current Monitor output and Open Drain Fault Flag Indicator Internal Analog Voltage to PWM Duty Cycle Generator for stand-alone Dimming Operation Compatible with Direct PWM Input with over 1000:1 Dimming Range Analog LED Current Adjust Input (IADJ) with over 15:1 Contrast Ratio Integrated P-Channel Driver to enable Series FET Dimming and LED Protection TPS92692-Q1: Automotive Q100 Grade 1 Qualified Description for the TPS92692-Q1
The TPS92692 and TPS92692-Q1 are high accuracy peak current mode based controllers designed to support step-up/down LED driver topologies. The device incorporates a rail-to-rail current amplifier to measure LED current and spread spectrum frequency modulation technique for improved EMI performance. This high performance LED controller can independently modulate LED current using either analog or PWM dimming techniques. Linear analog dimming response with over 15:1 range is obtained by varying the voltage across the high impedance analog adjust (IADJ) input. PWM dimming of LED current is achieved by directly modulating the DIM/PWM input pin with the desired duty cycle or byenabling the internal PWM generator circuit. The PWM generator translates the DC voltage at DIM/PWMpin to corresponding duty cycle by comparing it to the internal triangle wave generator. The optional PDRV gate driver output can be used to drive an external P-Channel series MOSFET.
The TPS92692 and TPS92692-Q1 devices support continuous LED status check through the current monitor (IMON) output. The devices also include an open drain fault indicator output to indicate LED over current, output over voltage and output under voltage conditions.
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