With a 40-V rated integrated switch FET, the TPS61161-Q1 is a boost converter that drives up to 10 LEDs in series. The boost converter runs at 600-kHz fixed switching frequency to reduce output ripple, improve conversion efficiency, and allow for the use of small external components.

The default white LED current is set with the external sensor resistor Rset, and the feedback voltage is regulated to 200 mV, as shown in the typical application. During the operation, the LED current can be controlled using the 1-wire digital interface (EasyScale protocol) through the CTRL pin. Alternatively, a pulse width modulation (PWM) signal can be applied to the CTRL pin through which the duty cycle determines the feedback reference voltage. In either digital or PWM mode, the TPS61161-Q1 does not burst the LED current; therefore, it does not generate audible noises on the output capacitor. For maximum protection, the device features integrated open LED protection that disables the TPS61161-Q1 to prevent the output from exceeding the absolute maximum ratings during open LED conditions.

The TPS61161 is available in a space-saving, 2-mm × 2-mm QFN (DRV) package with thermal pad.

• Qualified for Automotive Applications
• 2.7-V to 18-V Input Voltage Range
• 38-V Open LED Protection for 10 LEDs
• 200-mV Reference Voltage With ±2% Accuracy
• Flexible Digital and PWM Brightness Control
• Built-In Soft Start
• Up to 90% Efficiency
• 2-mm × 2-mm × 0.8-mm 6-pin QFN (DRV) Package With Thermal Pad

• Number of channels (#)
• 1
• Topology
• Boost
• Rating
• Automotive
• Operating temperature range (C)
• -40 to 125
• Vin (Min) (V)
• 2.7
• Vin (Max) (V)
• 18
• Vout (Min) (V)
• 2.7
• Vout (Max) (V)
• 38
• Iout (Max) (A)
• 0.02
• Iq (Typ) (mA)
• 1.5
• Switching frequency (Max) (kHz)
• 600
• Features
• Global dimming, Thermal Shutdown

TPS61161-Q1的完整型号有：TPS61161QDRVRQ1，以下是这些产品的关键参数及官网采购报价：

TPS61161QDRVRQ1，工作温度：-40 to 125，封装：WSON (DRV)-6，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网TPS61161QDRVRQ1的批量USD价格：.479（1000+）

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Design Tool for Analog Dimming Using a PWM Signal

This reference design supports the supply and acts as an indicator for a fuel injector using the TPS61161-Q1, which the boost converter drives the input from 5V-12V to 30V output. The design is set to be efficient and accurate with flexible control and a precise reference voltage.