TPS60252 - 具有 I2C 接口的用于 7 个 WLED 的高效充电泵

TPS60252是TI德州仪器公司的一款背光产品，TPS60252是具有 I2C 接口的用于 7 个 WLED 的高效充电泵，本站介绍了TPS60252的封装应用图解、特点和优点、功能等，并给出了与TPS60252相关的TI元器件型号供参考。

TPS60252 - 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 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.

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 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

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