計算工具
TPS92691-Q1
- Wide Input Voltage: 4.5 V to 65 V
- Wide Output Voltage Range: 2 V to 65 V
- Low Input Offset Rail-to-Rail Current Sense Amplifier
- Better than ±3% LED Current Accuracy over 25°C to 140°C Junction Temperature Range
- Compatible With High-Side and Low-Side Current Sense Implementations
- High-Impedance Analog LED Current Adjust Input (IADJ) With over 15:1 Contrast Ratio
- Over 1000:1 Series FET PWM Dimming Ratio With Integrated Series N-Channel Dim Driver Interface
- Continuous LED Current Monitor Output for System Fault Detection and Diagnoses
- Programmable Switching Frequency With External Clock Synchronization Capability
- Programmable Soft-Start and Slope Compensation
- Comprehensive Fault Protection Circuitry Including VCC Undervoltage Lockout (UVLO), Output Overvoltage Protection (OVP), Cycle-by-Cycle Switch Current Limit, and Thermal Protection
- TPS92691-Q1: Automotive Q100 Grade 1 Qualified
The TPS92691/-Q1 is a versatile LED controller that can support a range of step-up or step-down driver topologies. The device implements a fixed-frequency peak current mode control technique with programmable switching frequency, slope compensation, and soft-start timing. It incorporates a high voltage (65-V) rail-to-rail current sense amplifier that can directly measure LED current using either a high-side or a low-side series sense resistor. The amplifier is designed to achieve low input offset voltage and attain better than ±3% LED current accuracy over junction temperature range of 25°C to 140°C and output common-mode voltage range of 0 to 60 V.
LED current can be independently modulated using either analog or PWM dimming techniques. Linear analog dimming response with 15:1 range is obtained by varying the voltage from 140 mV to 2.25 V across the high impedance analog adjust (IADJ) input. PWM dimming of LED current is achieved by modulating the PWM input pin with the desired duty cycle and frequency. Optional DDRV gate driver output can be used to enable series FET dimming functionality to get over 1000:1 contrast ratio.
The TPS92691/-Q1 supports continuous LED status check through the current monitor (IMON) output. This allows for LED short circuit or open circuit detection and protection. Additional fault protection features include VCC UVLO, output OVP, switch cycle-by-cycle current limit, and thermal protection.
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檢視所有 6 | 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | TPS92691/-Q1 Multi-Topology LED Driver With Rail-to-Rail Current Sense Amplifier datasheet | PDF | HTML | 2015年 12月 11日 |
| White paper | LED Drivers for Automotive Exterior Applications (Rev. B) | 2018年 3月 27日 | ||
| Selection guide | 汽车外部照明应用的LED驱动器 | 2018年 3月 15日 | ||
| Technical article | Lighting the road ahead: LEDs in automotive front lighting | PDF | HTML | 2016年 9月 29日 | |
| EVM User's guide | TPS92691 Boost and Boost-to-Battery LED Driver Evaluation Board | 2016年 3月 11日 | ||
| EVM User's guide | TPS92691 SEPIC LED Driver Evaluation Board | 2015年 12月 9日 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
開發板
TPS92691EVM-001 — TPS92691 SEPIC LED 驅動器評估板
The TPS92691EVM-001 is a fully assembled and tested SEPIC LED driver designed to power a single string of series connected LEDs. Acurate closed-loop LED current regulation is achieved using a low-offset rail-to-rail curren sense amplifier that is compatible with either a high side or a low side (...)
使用指南: PDF
開發板
TPS92691EVM-752 — TPS92691-Q1 升壓和升壓至電池 LED 驅動器評估板
The TPS92691EVM-752 is a fully assembled and tested LED driver that can be configured as either a boost or a boost-to-battery topology to power a single string of series-connected LEDs. Accurate closed-loop LED current regulation is achieved using a low-offset rail-to-rail current-sense amplifier (...)
使用指南: PDF
模擬型號
TPS92691-Q1 Boost and SEPIC PSpice Transient Model (Rev. A)
SLVMBE8A.ZIP (153 KB) - PSpice Model
模擬工具
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
參考設計
TIDA-01382 — 具有線性熱保護機制的車用日間行車燈 (DRL) LED 驅動器參考設計
The TIDA-01382 reference design is a precision pulse width modulation (PWM) dimming solution for daytime running lights (DRL) including thermal foldback without requiring a microcontroller (MCU). The design includes key peripherals like electromagnetic interference (EMI) filtering, electromagnetic (...)
參考設計
PMP15003 — 適用於售後市場燈條、聚光燈和泛光燈的可調光 LED 驅動器參考設計
This in an automotive boost LED driver designed to drive an LED string of up to 34V at a maximum of 34W of output power. This solution as designed passes CISPR 25 class 3 EMC requirements and is capable of 10:1 analog dimming. High side current sensing allows one end of the LED string to be tied (...)
參考設計
PMP15027 — 適用於汽車照明和 ADAS 系統的高電流 SEPIC 參考設計
This reference design is ideal for high-current pulse operation of IR LEDs at up to 3A for automotive ADAS systems. It is capable of continuous and pulsed operation even through load dump and warm crank events. Other features include analog dimming and CISPR-25 class 3 EMI filtering.
參考設計
TIDA-01381 — 適用於 LED 頭燈的車用多通道溫度感測參考設計
This reference design details how to drive a string of matrix LED headlights, measure the temperature of the LEDs and implement support for thermal foldback which reduces the current in the LEDs as the LED temperature rises to prevent damage to the LEDs. The design uses temperature sensing (...)
參考設計
TIDA-01183 — 適用於車用照明的精密 PWM 調光 LED 驅動器參考設計
This reference design shows how to use pulse width modulation (PWM) to dim an automotive headlight or tail light with precision of better than 2% duty cycle without the necessity of using a microcontroller. This allows the design to be cost competitive. Devices used in this design are the (...)
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|---|---|---|
| HTSSOP (PWP) | 16 | 檢視選項 |
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