TPS92692-Q1 具有扩频频率调制和内部 PWM 发生器的高精度 LED 控制器 | 德州仪器 TI.com.cn

TPS92692-Q1
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具有扩频频率调制和内部 PWM 发生器的高精度 LED 控制器

 

描述

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 by enabling the internal PWM generator circuit. The PWM generator translates the DC voltage at DIM/PWM pin 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 overcurrent, output overvoltage and output undervoltage conditions.

特性

  • 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

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参数

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Part number 立即下单 Topology Channels (#) Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Iq (Typ) (mA) LED current per channel (mA) Switching frequency (Max) (kHz) Operating temperature range (C) Features Applications Package Group Package size: mm2:W x L (PKG) Rating
TPS92692-Q1 立即下单 Boost Controller
Buck Controller
Buck-Boost Controller
Cuk Controller
Flyback Controller
Sepic Controller    
1     4.5     65     3     65     5     1.8     5000     800     -40 to 125     Adjustable Switch Frequency
Fault Detection
LED Open Detection
LED Short to Ground Detection
Precision Dimming Control
Soft Start
Spread Spectrum
Synchronization Pin
Thermal Shutdown    
Adaptive Headlamp
Daytime Running
Fog
Headlamp
Position
Stop/Tail
Turn    
HTSSOP | 20     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)     Automotive    
TPS92682-Q1 立即下单 Boost Controller
Buck Controller
Buck-Boost Controller
Cuk Controller
Flyback Controller
Sepic Controller    
2     4.5     65     3     65     5     2.2     5000     1000     -40 to 125     Adjustable Switch Frequency
Fault Detection
Fault Diagnostic
LED Open Detection
LED Short to Ground Detection
Spread Spectrum
Synchronization Pin
Thermal Shutdown    
Adaptive Headlamp
Daytime Running
Fog
Headlamp
Position
Turn    
VQFN | 32     32VQFN: 25 mm2: 5 x 5 (VQFN | 32)     Automotive    
TPS92691-Q1 立即下单 Boost Controller
Buck Controller
Buck-Boost Controller
Cuk Controller
Flyback Controller
Sepic Controller    
1     4.5     65     3     65     5     1.5     5000     1000     -40 to 125     Adjustable Switch Frequency
Synchronization Pin
Thermal Shutdown    
Daytime Running
Fog
Headlamp
Position
Turn    
HTSSOP | 16     16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)     Automotive