Texas Instruments TPS92512 | Demoboard PMP10222

Description

The TPS92512/HV are 2.5A step-down (buck) current regulators with an integrated MOSFET to drive high current LEDs. Available with 42 V and 60 V (HV) input ranges, these LED drivers operate at a user selected fixed-frequency with peak-current mode control and deliver excellent line and load regulation.The TPS92512/HV LED drivers feature separate inputs for analog and pulse width modulation (PWM) dimming for no compromise brightness control achieving contrast ratios of greater than 10:1 and greater than 100:1, respectively. The PWM input is compatible with low-voltage logic standards for easy interface to a broad range of microcontrollers. The analog LED current setpoint is adjustable from 0 V to 300 mV using the IADJ input with an external 0 V to 1.8 V signal.For multi-string applications using two or more TPS92512/HV LED drivers, the internal oscillator can be overdriven by an external clock ensuring all of the converters operate at a common frequency thereby reducing the potential for beat frequencies and simplifying system EMI filtering. An adjustable input under-voltage lockout (UVLO) with hysteresis provides flexibility in setting start/stop voltages based upon supply voltage conditions.The TPS92512 includes cycle-by-cycle overcurrent protection and thermal shutdown protection. It is available in a 10-pin HVSSOP PowerPAD™ package.

Features

Integrated 200-mΩ High-Side MOSFET4.5-V to 42-V Input Voltage Range(4.5 V to 60 V for the TPS92512HV)0 V to 300 mV Adjustable Voltage Reference±5% LED Current Accuracy100-kHz to 2-MHz Switching Frequency RangeDedicated PWM Dimming InputAdjustable Undervoltage-Lock-OutOvercurrent ProtectionOvertemperature ProtectionMSOP-10 Package with PowerPAD

Typical applications

• Street Lighting
• Retail Lighting
• Light Bars
• General Industrial and Commercial Illumination
• Transportation Lighting
• Channel Letters
• Emergency/Exit Lighting
• Appliance Lighting

More information

• Datasheet
• IC product information