2.5-A Buck Current Regulator for LED Lighting - TPS92512

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

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Parametrics Compare all products in Illumination & General Lighting LED Driver

 
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)
Special Features
Rating
Operating Temperature Range (C)
Pin/Package
TPS92512 TPS92512HV TPS92513 TPS92513HV
DC/DC    DC/DC    DC/DC    DC/DC   
4.5    4.5    4.5    4.5   
42    60    42    60   
2.5    2.5    1.5    1.5   
0.2    0.2    0.2    0.2   
40    58    40    58   
1    1    1    1   
Buck    Buck    Buck    Buck   
Analog
PWM   
Analog
PWM   
Analog
PWM   
Analog
PWM   
N/A    N/A    N/A    N/A   
Converter
Inductive   
Converter
Inductive   
Converter
Inductive   
Converter
Inductive   
100    100    100    100   
2000    2000    2000    2000   
0.337    0.337    0.337    0.337   
0.2    0.2    0.2    0.2   
Adjustable Switch Frequency
Enable/Shutdown
Integrated Switch
Synchronization Pin
Thermal Shutdown   
Adjustable Switch Frequency
Enable/Shutdown
Integrated Switch
Synchronization Pin
Thermal Shutdown   
Adjustable Switch Frequency
Enable/Shutdown
Integrated Switch
Synchronization Pin
Thermal Shutdown   
Adjustable Switch Frequency
Enable/Shutdown
Integrated Switch
Synchronization Pin
Thermal Shutdown   
Catalog    Catalog    Catalog    Catalog   
-40 to 125    -40 to 125    -40 to 125    -40 to 125   
10MSOP-PowerPAD    10MSOP-PowerPAD    10MSOP-PowerPAD    10MSOP-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