The TPS61185 IC provides highly integrated solutions for large-size LCD backlighting. This device has a built-in high efficiency boost regulator with integrated 2 A/40 V power MOSFET. The eight current sink regulators provide high precision current regulation and matching. In total, the device can support up to 80 LEDs. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to improve efficiency.

The TPS61185 supports the PWM method for brightness dimming. Simply tie the unused current sinks to ground if fewer than eight are needed. During PWM dimming, each of the eight current regulators is turned on/off at the duty cycle determined by an external pulse width modulation (PWM) signal input to the PWM pin. The frequency at which each current regulator turns on/off follows the input PWM signal on the PWMIN pin if the MODE pin is grounded. If the MODE pin is left floating or tied high, the regulators turn on/off at the frequency programmed by an external resistor on the FPWMO pin.

The TPS61185 IC supports boost switch frequency programming from 600kHz to 2MHz by an external resistor on the FSW pin. The device also provides a driver output for an optional external PFET connected between the input and inductor for truly disconnecting the battery from LED during the shutdown or fault protection. The device integrates resistor programmable over-voltage protection, soft-start, and thermal shutdown.

The TPS61185 IC has a built-in linear regulator to power the internal circuits of the IC. The device is in a 4 mm × 4 mm QFN package.

• 4.2 V to 24 V Input Voltage
• Integrated 2 A/40 V MOSFET
• 600 kHz to 2 MHz Programmable Switching Frequency
• Adaptive Boost Output for Best Efficiency
• Design to Use Small L-C Components
• Integrated Loop Compensation
• Eight 25 mA Current Sinks
• Up to 10 WLED in Series
• 1% Current Matching and Accuracy
• PWM Brightness Interface Control
• 200 mV Ripple Under PWM Dimming
• Driver for Input/Output Isolation PFET
• Programmable Over Voltage Threshold
• 100 Hz to 5 kHz Programmable PWM Dimming Frequency
• Up to 20 kHz Direct PWM Dimming Frequency
• Enhanced Electrostatic Discharge Immunity Level
• Built-in WLED Open/Short Protection
• Over Temperature Protection
• 24 Pin 4 mm × 4 mm QFN Package
• APPLICATIONS
  • Notebook LCD Display Backlight

• Number of channels (#)
• 8
• Vin (Min) (V)
• 4.2
• Vin (Max) (V)
• 24
• Vout (Min) (V)
• 5
• Vout (Max) (V)
• 40
• Type
• Inductive
• Switching frequency (Max) (kHz)
• 2000
• LED current per channel (mA)
• 25
• Peak efficiency (%)
• 90
• Topology
• Boost
• Features
• Load Disconnect During Shutdown
• Operating temperature range (C)
• -40 to 85

TPS61185的完整型号有：TPS61185RGER、TPS61185RGET，以下是这些产品的关键参数及官网采购报价：

TPS61185RGER，工作温度：-40 to 85，封装：VQFN (RGE)-24，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TPS61185RGER的批量USD价格：0.42（1000+）

TPS61185RGET，工作温度：-40 to 85，封装：VQFN (RGE)-24，包装数量MPQ：250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TPS61185RGET的批量USD价格：0.504（1000+）

TPS61185EVM-335 — 用于 TPS61185 2A WLED 驱动器 IC 的评估模块

TPS61185EVM-335 是一块完全组装且经过测试的电路板，用于评估 TPS61185 可调节 2A WLED 驱动器 IC。如果 WLED 不可用于连接 EVM，可从 TI 订购 WLEDEVM-260 电路板。

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