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TPS92511

現行

500mA 30W 陽極定電流降壓 LED 驅動器

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open-in-new 比較替代產品
功能相同，但針腳輸出與所比較的裝置不同。
TPS922050 現行 具有類比/PWM 調光選項的 65V、1A 降壓 LED 驅動器 Newer device with higher output current and smaller size.
TPS922053 現行 具有電感快速調光和展頻的 65-V、2-A 降壓 LED 驅動器 New device with inductive fast dimming and spread spectrum

TPS92511

現行
產品規格表 立即訂購

產品詳細資料

Input voltage type DC/DC Topology Buck Vin (min) (V) 4.5 Vin (max) (V) 65 Vout (max) (V) 65 Vout (min) (V) 0.2 Iout (max) (A) 0.5 Iq (typ) (mA) 2.8 Features Adjustable Switch Frequency, Enable/Shutdown, Integrated Switch, Thermal shutdown Operating temperature range (°C) -40 to 125 Dimming method Analog, PWM Number of channels 1 Rating Catalog
Input voltage type DC/DC Topology Buck Vin (min) (V) 4.5 Vin (max) (V) 65 Vout (max) (V) 65 Vout (min) (V) 0.2 Iout (max) (A) 0.5 Iq (typ) (mA) 2.8 Features Adjustable Switch Frequency, Enable/Shutdown, Integrated Switch, Thermal shutdown Operating temperature range (°C) -40 to 125 Dimming method Analog, PWM Number of channels 1 Rating Catalog
HSOIC (DDA) 8 29.4 mm² (4.9 mm × 6 mm)
  • Wide Input Voltage Range: 4.5 V to 65 V
  • Requires NO External Current Sensing Resistor
  • Requires NO External Loop Compensation
  • Ease of Use, Needs Minimum 5 Components
  • 1000:1 Contrast Ratio Feasible
  • Single Layer PCB Feasible
  • Can Work as High Voltage Buck Regulators
  • Can Work as Linear Current Shunt Regulators
  • Integrated Low-side N-channel MOSFET
  • LED Current Programmable up to 0.5 A
  • Typically ±3.6% LED Current Accuracy
  • Switching Frequency Programmable From 50 kHz to 500 kHz
  • Current Limit Protection
  • VCC Under-voltage Lock-out
  • Thermal Shutdown Protection
  • Support Analog Dimming and Thermal Foldback
  • Power Enhanced SOIC-8 Exposed Thermal Pad Package (HSOP-8)
  • Wide Input Voltage Range: 4.5 V to 65 V
  • Requires NO External Current Sensing Resistor
  • Requires NO External Loop Compensation
  • Ease of Use, Needs Minimum 5 Components
  • 1000:1 Contrast Ratio Feasible
  • Single Layer PCB Feasible
  • Can Work as High Voltage Buck Regulators
  • Can Work as Linear Current Shunt Regulators
  • Integrated Low-side N-channel MOSFET
  • LED Current Programmable up to 0.5 A
  • Typically ±3.6% LED Current Accuracy
  • Switching Frequency Programmable From 50 kHz to 500 kHz
  • Current Limit Protection
  • VCC Under-voltage Lock-out
  • Thermal Shutdown Protection
  • Support Analog Dimming and Thermal Foldback
  • Power Enhanced SOIC-8 Exposed Thermal Pad Package (HSOP-8)

The TPS92511 is an easy to use 65V constant current buck converter for driving a single LED string with current up to 0.5A and efficiency up to 95%.  Only 5 external components are required for basic operation and single layer PCB layout is feasible because of the integration of a N-MOSFET, no external current sensing resistor, no external compensation and the proper terminal assignment.  A high-value external resistor programs the LED current so that fine tuning of the LED current can be achieved.  Another high-value external resistor programs a constant switching frequency from 50kHz to 500kHz. EMI design becomes easier as a result of constant switching frequency.  The TPS92511 provides a wide input voltage range from 4.5V to 65V.  By adding simple external circuits, the device can handle applications with even higher input voltages.

The TPS92511 employs a proprietary control scheme to regulate the LED current without the need of sensing the LED current directly. It applies a floating buck topology with a low-side N-channel power MOSFET, which does not need boot-strapping capacitor. For multiple channel systems, the floating buck topology together with the proprietary control scheme allows a common-anode connection of the LED strings without an external current sensing network.  This significantly reduces the number of wiring and as well as overall manufacturing cost.

The TPS92511 has very fast PWM dimming response time. For example, if the switching frequency is 500 kHz, the minimum DIM pulse width is 6µs and the dimming frequency is 150Hz, a contrast ratio of more than 1000:1 can be achieved.

The TPS92511 is available in the Power Enhanced SOIC-8 exposed thermal pad package.

For all available packages, see the orderable addendum at the end of the datasheet.

The TPS92511 is an easy to use 65V constant current buck converter for driving a single LED string with current up to 0.5A and efficiency up to 95%.  Only 5 external components are required for basic operation and single layer PCB layout is feasible because of the integration of a N-MOSFET, no external current sensing resistor, no external compensation and the proper terminal assignment.  A high-value external resistor programs the LED current so that fine tuning of the LED current can be achieved.  Another high-value external resistor programs a constant switching frequency from 50kHz to 500kHz. EMI design becomes easier as a result of constant switching frequency.  The TPS92511 provides a wide input voltage range from 4.5V to 65V.  By adding simple external circuits, the device can handle applications with even higher input voltages.

The TPS92511 employs a proprietary control scheme to regulate the LED current without the need of sensing the LED current directly. It applies a floating buck topology with a low-side N-channel power MOSFET, which does not need boot-strapping capacitor. For multiple channel systems, the floating buck topology together with the proprietary control scheme allows a common-anode connection of the LED strings without an external current sensing network.  This significantly reduces the number of wiring and as well as overall manufacturing cost.

The TPS92511 has very fast PWM dimming response time. For example, if the switching frequency is 500 kHz, the minimum DIM pulse width is 6µs and the dimming frequency is 150Hz, a contrast ratio of more than 1000:1 can be achieved.

The TPS92511 is available in the Power Enhanced SOIC-8 exposed thermal pad package.

For all available packages, see the orderable addendum at the end of the datasheet.
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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 TPS92511 500-mA, 65-V Common Anode Constant Current Buck LED Driver Without External Current Sensing Resistor datasheet (Rev. A) PDF | HTML 2014/5/16
白皮書 Common LED Functions and LED Driver Design Considerations 2020/9/21

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開發板

TPS92511EVM — TPS92511 評估板

TPS92511EVM 是一款用於單串 12 個 LED 的 LED 驅動器，其 LED 電流為 0.5A。  憑藉專有的脈衝位準調變 (PM) 技術與整合式電流感測電阻器，此 EVM 達成了良好的 LED 電流調節與較少的元件數量。

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TPS92511 PSpice Transient Model

SNVM561.ZIP (551 KB) - PSpice 模型
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