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TPS92691 Datasheet(PDF) 1 Page - Texas Instruments |
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TPS92691 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 46 page VIN (V) 8 9 10 11 12 13 14 15 16 17 18 75 80 85 90 95 100 D019 VO = 60 V, ILED = 300 mA TPS92691-Q1 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VIN LED+ LEDÅ VIN SS RT/SYNC PWM COMP IADJ IMON AGND PAD VCC GATE IS PGND OVP DDRV CSP CSN L ROV1 ROV2 RIS RCS Q2 Q1 D CSS CCOMP RT CIMON COUT CVCC CIN COV RADJ2 RADJ1 VPWM Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPS92691, TPS92691-Q1 SLVSD68 – DECEMBER 2015 TPS92691/-Q1 Multi-Topology LED Driver With Rail-to-Rail Current Sense Amplifier 1 Features 3 Description The TPS92691/-Q1 is a versatile LED controller that 1 • Wide Input Voltage: 4.5 V to 65 V can support a range of step-up or step-down driver • Wide Output Voltage Range: 2 V to 65 V topologies. The device implements a fixed-frequency • Low Input Offset Rail-to-Rail Current Sense peak current mode control technique with Amplifier programmable switching frequency, slope compensation, and soft-start timing. It incorporates a – Better than ±3% LED Current Accuracy over high voltage (65-V) rail-to-rail current sense amplifier 25°C to 140°C Junction Temperature Range that can directly measure LED current using either a – Compatible With High-Side and Low-Side high-side or a low-side series sense resistor. The Current Sense Implementations amplifier is designed to achieve low input offset voltage and attain better than ±3% LED current • High-Impedance Analog LED Current Adjust Input accuracy over junction temperature range of 25°C to (IADJ) With over 15:1 Contrast Ratio 140°C and output common-mode voltage range of 0 • Over 1000:1 Series FET PWM Dimming Ratio to 60 V. With Integrated Series N-Channel Dim Driver LED current can be independently modulated using Interface either analog or PWM dimming techniques. Linear • Continuous LED Current Monitor Output for analog dimming response with 15:1 range is obtained System Fault Detection and Diagnoses by varying the voltage from 140 mV to 2.25 V across • Programmable Switching Frequency With External the high impedance analog adjust (IADJ) input. PWM Clock Synchronization Capability dimming of LED current is achieved by modulating the PWM input pin with the desired duty cycle and • Programmable Soft-Start and Slope frequency. Optional DDRV gate driver output can be Compensation used to enable series FET dimming functionality to • Comprehensive Fault Protection Circuitry get over 1000:1 contrast ratio. Including VCC Undervoltage Lockout (UVLO), The TPS92691/-Q1 supports continuous LED status Output Overvoltage Protection (OVP), Cycle-by- check through the current monitor (IMON) output. Cycle Switch Current Limit, and Thermal This allows for LED short circuit or open circuit Protection detection and protection. Additional fault protection • TPS92691-Q1: Automotive Q100 Grade 1 features include VCC UVLO, output OVP, switch Qualified cycle-by-cycle current limit, and thermal protection. 2 Applications Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) • TPS92691-Q1: Automotive Exterior Lighting TPS92691-Q1 Applications HTSSOP (16) 5.10 mm × 6.60 mm TPS92691 • Architectural and General Lighting Applications (1) For all available packages, see the orderable addendum at the end of the data sheet. Typical Boost LED Driver Application Schematic Efficiency vs Output Voltage 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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