TPS60251 - 具有 I2C 接口的用于 7 个 WLED 的高效充电泵

TPS60251是TI德州仪器公司的一款背光产品，TPS60251是具有 I2C 接口的用于 7 个 WLED 的高效充电泵，本站介绍了TPS60251的封装应用图解、特点和优点、功能等，并给出了与TPS60251相关的TI元器件型号供参考。

TPS60251 - 具有 I2C 接口的用于 7 个 WLED 的高效充电泵 - 背光 - LED驱动器 - 德州仪器

产品描述

The TPS60251 is a high efficiency, constant frequency charge pump DC/DC converter that uses a dual mode 1× and 1.5× conversion to maximize efficiency over the input voltage range. It drives up to five white LEDs for a main display and up to two white LEDs for a 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 TPS60251 achieves high efficiency over the full 1-cell lithium-battery input voltage range.

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

The TPS60251 is available in a 24-pin 4mmx4mm thin QFN.

产品特性

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 230-mA Maximum Output Current
Auto Switching Between ×1 and ×1.5 Mode for Maximum Efficiency
Built-in Soft Start and Current Limit
Hardware Enable/Disable
Open Lamp Detection
24-Pin 4mm x 4mm QFN
APPLICATIONS
- Cellular Phones
- PDA, PMP, GPS (Up To 4 Inch Display)
- Multidisplay Handheld Devices

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