TPS60230 5-Channel, Current-regulated 125-mA Charge Pump for White LED Backlight in 3x3 QFN | TI.com

TPS60230 (ACTIVE)

5-Channel, Current-regulated 125-mA Charge Pump for White LED Backlight in 3x3 QFN

 

Description

The TPS60230 charge pump is optimized for white LED supplies in backlit color display applications. The device provides a constant current, set by an external resistor, for each LED. The supply voltage ranges from 2.7 V to 6.5 V and is ideally suited for all applications powered by a single LI-Ion battery cell or three to four NiCd, NiMH, or Alkaline battery cells. The TPS60230 provides up to 25 mA per LED, for a total of 125 mA, for input voltages ranging from 3.1 V to 6.5 V. High efficiency is achieved by utilizing a 1x/1.5x fractional conversion technique in combi- nation with very low dropout current sources. Additionally, the current controlled charge pump ensures low input current ripple and EMI. Only two external 1 µF and two 0.47 µF capacitors are required to build a complete small and low cost power supply solution. The TP60230 switches at 1 MHz operating frequency and is available in a small 16-pin QFN (RGT) package to keep board space to a minimum.

Features

  • Regulated Output Current With 0.3% Matching Over Temperature
  • Drives up to 5 LEDs at 25 mA Each
  • LED Brightness Control Through PWM Control Signal
  • High Efficiency by Fractional Conversion With 1x and 1.5x Modes
  • 1 MHz Switching Frequency
  • 2.7 V to 6.5 V Operating Input Voltage Range
  • Internal Softstart Limits Inrush Current
  • Low Input Ripple and Low EMI
  • Overcurrent and Overtemperature Protected
  • Undervoltage Lockout With Hysteresis
  • Ultra-Small 3mm × 3mm QFN Package
  • APPLICATIONS
    • White LED Backlight for Color Displays in Cellular Phones, Smart Phones, PDAs, Handheld PCs, Digital Cameras, and Camcorders
    • Key Backlight

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Parametrics Compare all products in Backlight LED drivers

 
Channels (#)
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Switching Frequency (Max) (kHz)
Type
LED current per channel (mA)
LED (#)
Topology
Shutdown Current (Typ) (uA)
Peak efficiency (%)
LED configuration
Features
Operating temperature range (C)
Package Group
Package size: mm2:W x L (PKG)
TPS60230 TPS60231
5     3    
2.7     2.7    
6.5     6.5    
2.7     2.7    
6.5     6.5    
1250     1250    
Capacitive     Capacitive    
25     25    
5     3    
Boost     Boost    
0.1     0.1    
90     90    
Parallel     Parallel    
Analog Dimming
Analog/PWM Mixed Dimming
Direct PWM Dimming
Enable/Shutdown
Fault Detection
Integrated Switch
Load Disconnect During Shutdown
Soft Start
Synchronous Rectification
Thermal Shutdown    
Analog Dimming
Analog/PWM Mixed Dimming
Direct PWM Dimming
Enable/Shutdown
Fault Detection
Integrated Switch
Load Disconnect During Shutdown
Soft Start
Synchronous Rectification
Thermal Shutdown    
-40 to 85     -40 to 85    
VQFN | 16     VQFN | 16    
16VQFN: 9 mm2: 3 x 3 (VQFN | 16)     16VQFN: 9 mm2: 3 x 3 (VQFN | 16)