TPS60255

Name: TPS60255
Brand: TI
SKU: TPS60255
Price: 0.739 USD

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7-kanalige, hocheffiziente 175-mA-Ladungspumpe für weiße LED-Hintergrundbeleuchtung

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Datenblatt

document-pdfAcrobat HIGH EFFICIENCY CHARGE PUMP FOR 7 WLEDs DRIVER WITH 1 WIRE INTERFACE datasheet (Englisch)

TPS60255

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Datenblatt

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Produktdetails

Number of channels

7

Vin (min) (V)

2.7

Vin (max) (V)

6

Vout (min) (V)

2.7

Vout (max) (V)

6.5

Type

Capacitive

Switching frequency (max) (kHz)

875

Duty cycle (max) (%)

100

LED current per channel (mA)

25

Peak efficiency (%)

93

Topology

Boost

Features

Analog Dimming, EasyScale 1-Wire Interface, Enable/Shutdown, Fault Detection, 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)

2.7

Vin (max) (V)

6

Vout (min) (V)

2.7

Vout (max) (V)

6.5

Type

Capacitive

Switching frequency (max) (kHz)

875

Duty cycle (max) (%)

100

LED current per channel (mA)

25

Peak efficiency (%)

93

Topology

Boost

Features

Analog Dimming, EasyScale 1-Wire Interface, Enable/Shutdown, Fault Detection, 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 x 3

2.7 V to 6.0 V Input Voltage Range
1× and 1.5× Charge Pump
Auto Switching Between 1× and 1.5× Modes
750 kHz Charge Pump Frequency
Seven Individually-regulated WLED Current Sinks
Single- Wire Interface for Dimming and ON/OFF Control
25 mA max LED Current for Six Current Sinks
One 80 mA Current Sink
Open WLED Detection
Built-in Soft Start and Current Limit
16-pin, 3 mm × 3 mm QFN Package
APPLICATIONS
- Cellular Phones
- Portable Navigation Displays
- Multi-display Handheld Devices

2.7 V to 6.0 V Input Voltage Range
1× and 1.5× Charge Pump
Auto Switching Between 1× and 1.5× Modes
750 kHz Charge Pump Frequency
Seven Individually-regulated WLED Current Sinks
Single- Wire Interface for Dimming and ON/OFF Control
25 mA max LED Current for Six Current Sinks
One 80 mA Current Sink
Open WLED Detection
Built-in Soft Start and Current Limit
16-pin, 3 mm × 3 mm QFN Package
APPLICATIONS
- Cellular Phones
- Portable Navigation Displays
- Multi-display Handheld Devices

The TPS60255 is a high-efficiency, constant frequency charge pump DC/DC converter that uses 1× and 1.5× conversion to maximize efficiency for the input voltage range. By using adaptive 1×/1.5× charge-pump modes and very low dropout current regulators, the TPS60255 achieves high efficiency for the entire one-cell lithium battery range. The protection features include soft start, over-current limit, thermal shut down, and over-voltage detection. The device automatically detects and removes unused current sinks from the control loop.

This device drives six 25 mA current sinks and one 80 mA current sink. These current regulators are programmed by three independent brightness registers and five ON/OFF bits using a single-wire interface (EasyScale™). This offers flexible applications for a variety of lighting control in portable devices.

The TPS60255 is a high-efficiency, constant frequency charge pump DC/DC converter that uses 1× and 1.5× conversion to maximize efficiency for the input voltage range. By using adaptive 1×/1.5× charge-pump modes and very low dropout current regulators, the TPS60255 achieves high efficiency for the entire one-cell lithium battery range. The protection features include soft start, over-current limit, thermal shut down, and over-voltage detection. The device automatically detects and removes unused current sinks from the control loop.

This device drives six 25 mA current sinks and one 80 mA current sink. These current regulators are programmed by three independent brightness registers and five ON/OFF bits using a single-wire interface (EasyScale™). This offers flexible applications for a variety of lighting control in portable devices.

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Technische Dokumentation

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Alle anzeigen 6

	Typ	Titel	Datum
*	Data sheet	HIGH EFFICIENCY CHARGE PUMP FOR 7 WLEDs DRIVER WITH 1 WIRE INTERFACE datasheet	24 Mär 2008
	White paper	Common LED Functions and LED Driver Design Considerations	21 Sep 2020
	Application note	Performing Accurate PFM Mode Efficiency Measurements (Rev. A)	11 Dez 2018
	Selection guide	Power Management Guide 2018 (Rev. R)	25 Jun 2018
	Application note	Extending the Soft Start Time Without a Soft Start Pin (Rev. B)	15 Jun 2017
	EVM User's guide	TPS60255EVM-262	03 Mär 2008

Design und Entwicklung

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TPS60255

7-kanalige, hocheffiziente 175-mA-Ladungspumpe für weiße LED-Hintergrundbeleuchtung

TPS60255

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