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TPS60252

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Hocheffiziente Ladungspumpe für 7 WLEDs mit I2C-Schnittstelle mit 0x76 I2C Slave-Adresse

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Datenblatt

TPS60252

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

Number of channels 7 Vin (min) (V) 3 Vin (max) (V) 6 Vout (min) (V) 2.7 Vout (max) (V) 6.5 Type Capacitive Switching frequency (max) (kHz) 875 Duty cycle (max) (%) 0.23 LED current per channel (mA) 25 Peak efficiency (%) 93 Topology Boost Features Analog Dimming, Enable/Shutdown, Fault Detection, I2C control, Integrated Switch, Load Disconnect During Shutdown, OVP, Soft Start, Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 7 Vin (min) (V) 3 Vin (max) (V) 6 Vout (min) (V) 2.7 Vout (max) (V) 6.5 Type Capacitive Switching frequency (max) (kHz) 875 Duty cycle (max) (%) 0.23 LED current per channel (mA) 25 Peak efficiency (%) 93 Topology Boost Features Analog Dimming, Enable/Shutdown, Fault Detection, I2C control, Integrated Switch, Load Disconnect During Shutdown, OVP, Soft Start, Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog
WQFN (RTE) 16 9 mm² (3 mm × 3 mm)
  • 3.0 V to 6.0 V Input Voltage Range
  • ×1 and ×1.5 Charge Pump
  • Fully Programmable Current with I2C
    • 64 Dimming Steps with 25mA Maximum (Sub and Main Display Banks)
    • 4 Dimming Steps with 80mA Maximum (DM5 for Auxiliary Application)
  • 2% Current Matching for Sub LEDs at Light Load Condition (Each 100µA)
  • 750 kHz Charge Pump Frequency
  • Continuous 230mA Maximum Output Current
  • Auto Switching Between ×1 and ×1.5 Mode for Maximum Efficiency
  • Built-in Soft Start and Current Limit
  • Open Lamp Detection
  • 16-Pin 3mm x 3mm QFN
  • TPS60250 (I2C Slave Address: 1110111)
  • TPS60252 (I2C Slave Address: 1110110)
  • APPLICATIONS
    • Cellular Phones
    • PDA, PMP, GPS (Up To 4 Inch LCD Display)
    • Multidisplay Handheld Devices
  • 3.0 V to 6.0 V Input Voltage Range
  • ×1 and ×1.5 Charge Pump
  • Fully Programmable Current with I2C
    • 64 Dimming Steps with 25mA Maximum (Sub and Main Display Banks)
    • 4 Dimming Steps with 80mA Maximum (DM5 for Auxiliary Application)
  • 2% Current Matching for Sub LEDs at Light Load Condition (Each 100µA)
  • 750 kHz Charge Pump Frequency
  • Continuous 230mA Maximum Output Current
  • Auto Switching Between ×1 and ×1.5 Mode for Maximum Efficiency
  • Built-in Soft Start and Current Limit
  • Open Lamp Detection
  • 16-Pin 3mm x 3mm QFN
  • TPS60250 (I2C Slave Address: 1110111)
  • TPS60252 (I2C Slave Address: 1110110)
  • APPLICATIONS
    • Cellular Phones
    • PDA, PMP, GPS (Up To 4 Inch LCD Display)
    • Multidisplay Handheld Devices

The TPS60250/2 are high efficiency, constant frequency charge pump DC/DC converters that use dual mode 1× and 1.5× conversions to maximize efficiency over the input voltage range. The devices drive up to five white LEDs for the main display and up to two white LEDs for the sub display with regulated constant current for uniform intensity. By utilizing adaptive 1×/1.5× charge pump modes and very low-dropout current regulators, the TPS60250/2 achieve high efficiency over the full 1-cell lithium-battery input voltage range.

Four enable inputs, ENmain, ENsub1, ENsub2, and ENaux, available through the I2C, are used for simple on/off controls for the independent main, sub1, sub2, and DM5 displays, respectively. To lower the operating current when using one sub display LED, the devices provide completely separate operation for the sub display LEDs.

The TPS60250/2 are available in a 16-pin 3mm x 3mm thin QFN.

The TPS60250/2 are high efficiency, constant frequency charge pump DC/DC converters that use dual mode 1× and 1.5× conversions to maximize efficiency over the input voltage range. The devices drive up to five white LEDs for the main display and up to two white LEDs for the sub display with regulated constant current for uniform intensity. By utilizing adaptive 1×/1.5× charge pump modes and very low-dropout current regulators, the TPS60250/2 achieve high efficiency over the full 1-cell lithium-battery input voltage range.

Four enable inputs, ENmain, ENsub1, ENsub2, and ENaux, available through the I2C, are used for simple on/off controls for the independent main, sub1, sub2, and DM5 displays, respectively. To lower the operating current when using one sub display LED, the devices provide completely separate operation for the sub display LEDs.

The TPS60250/2 are available in a 16-pin 3mm x 3mm thin QFN.
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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Neueste englische Version herunterladen Datum
* Datenblatt High Efficiency Charge Pump for 7 WLEDs with I2C Interface datasheet (Rev. C) 23.04.2008
Whitepaper Common LED Functions and LED Driver Design Considerations 21.09.2020
Anwendungshinweis Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 11.12.2018
Anwendungshinweis Extending the Soft Start Time Without a Soft Start Pin (Rev. B) 15.06.2017

Design und Entwicklung

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WQFN (RTE) 16 Ultra Librarian
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