TPS92512 2.5-A Buck Current Regulator for LED Lighting | TI.com

TPS92512 (ACTIVE) 2.5-A Buck Current Regulator for LED Lighting

 

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 MOSFET
  • 4.5-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 Accuracy
  • 100-kHz to 2-MHz Switching Frequency Range
  • Dedicated PWM Dimming Input
  • Adjustable Undervoltage-Lock-Out
  • Overcurrent Protection
  • Overtemperature Protection
  • MSOP-10 Package with PowerPAD

WEBENCH® Designer TPS92512

  V in Lower V in Upper
4.5 ≤  V  V ≤ 42.0
Ambient Temp  °C ≤ 125°C
Light Output (optional)  Lumens

Parametrics

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Part number Order Input voltage (type) Vin (Min) (V) Vin (Max) (V) Iout (Max) (A) Vout (Min) (V) Vout (Max) (V) Regulated outputs (#) Topology Dimming method Power factor correction (Min) Type Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Vref (V) Features Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
TPS92512 Order now DC/DC     4.5     42     2.5     0.2     40     1     Buck     Analog
PWM    
    Converter
Inductive    
100     2000     0.337     0.2     Adjustable Switch Frequency
Enable/Shutdown
Integrated Switch
Synchronization Pin
Thermal Shutdown    
Catalog     -40 to 125     MSOP-PowerPAD | 10     10MSOP-PowerPAD: 15 mm2: 4.9 x 3 (MSOP-PowerPAD | 10)    
TPS92512HV Order now DC/DC     4.5     60     2.5     0.2     58     1     Buck     Analog
PWM    
    Converter
Inductive    
100     2000     0.337     0.2     Adjustable Switch Frequency
Enable/Shutdown
Integrated Switch
Synchronization Pin
Thermal Shutdown    
Catalog     -40 to 125     MSOP-PowerPAD | 10     10MSOP-PowerPAD: 15 mm2: 4.9 x 3 (MSOP-PowerPAD | 10)    
TPS92513 Order now DC/DC     4.5     42     1.5     0.2     40     1     Buck     Analog
PWM    
    Converter
Inductive    
100     2000     0.337     0.2     Adjustable Switch Frequency
Enable/Shutdown
Integrated Switch
Synchronization Pin
Thermal Shutdown    
Catalog     -40 to 125     MSOP-PowerPAD | 10     10MSOP-PowerPAD: 15 mm2: 4.9 x 3 (MSOP-PowerPAD | 10)    
TPS92513HV Order now DC/DC     4.5     60     1.5     0.2     58     1     Buck     Analog
PWM    
    Converter
Inductive    
100     2000     0.337     0.2     Adjustable Switch Frequency
Enable/Shutdown
Integrated Switch
Synchronization Pin
Thermal Shutdown    
Catalog     -40 to 125     MSOP-PowerPAD | 10     10MSOP-PowerPAD: 15 mm2: 4.9 x 3 (MSOP-PowerPAD | 10)