High-Efficiency, Tunable White-LED DC-DC Driver

Tare da Bluetooth® Smart Connectivity Reference Design

TEXAS INSTRUMENTS | TIDA-01096 | Agusta 2016

Duba PDF Sauke PDF Fassara PDF

Design Overview

TIDA-01096 TI Design ya kasance gwada DC-DC LED driver subsystem don daidaitacce, farin LED fitilu. An gina zane a kan dandalin wayar hannu system-on-chip (SoC), wanda zai iya ba da damar daidaita ƙarfi (dimming) da kuma sarrafa yanayin zafin launi (CCT) ta amfani da kowane na'urar Bluetooth low energy (BLE).

Key Innovation: Tunable white luminaires simulate daylight conditions. With separate warm-white and cold-white LED strings, the design allows CCT tuning, which helps achieve proper circadian stimulation for human wellness applications.

Key Performance Specifications

98%
Peak Efficiency with Analog Dimming
1:50
Contrast Ratio with PWM Dimming
5 kHz
Max PWM Dimming Frequency
700 mA
Max LED Current per String

Key Features & Benefits

High-Efficiency Operation

98% efficiency over 100% to 50% brightness with analog dimming, reducing energy consumption and heat generation in LED lighting systems.

Advanced Dimming Capabilities

1:25 contrast ratio tare da analog dimming da 1:50 tare da PWM dimming, yana ba da ingantaccen sarrafa haske don yanayin haske daban-daban.

Sarrafa Bluetooth mara waya

Bluetooth Smart haɗin kai yana ba da damar sarrafa ƙarfi da zafin launi ta wayar hannu ko wasu na'urorin BLE.

Hange Hasken Yanayi

Auna haske na OPT3001 yana ba da damar girbi hasken rana da aiwatar da lumen akai-akai a cikin software don ingacin kuzari.

Kariya Gabaɗaya

Kariyar Ƙarfin Wuta da Zazzabi mai Yawa don direba da kuma na'urar LED suna tabbatar da aiki mai dogaro da kuma tsawaita rayuwa.

Tallafin Hasken Circadian

Ikonsar fari mai iyawa yana tallafa wa aikace-aikacen lafiyar ɗan adam ta hanyar kwaikwayon yanayin hasken rana a cikin yini.

Taki-daka Bayani Game da Abubuwan Ciki

Document Contents

System Overview

Light-emitting diodes (LEDs) are increasingly being used as a light source. At the time of this writing, the focus of lighting is currently shifting from simply illuminating areas with constant light output to providing quality and controlled light output. High quality lighting with adjustable intensity and adjustable color temperature plays a key role in enhancing architecture and human wellness.

Don yawo haske farin canza zafin launi, mai zane zai iya aiwatar da haɗin haske mai dumi (zafin launi kusan 2500 K) da haske mai sanyi (zafin launi kusan 5700 K). Tunable, farin chip-on-board (COB) LEDs suna samuwa tare da kirtani daban-daban guda biyu. Ta hanyar canza halin yanzu ta cikin kirtani, mai zane zai iya ƙirƙirar zafin launi daga 2500 K zuwa 5700 K.

Injin farin-LED mai kunnawa tare da direbobi za a iya amfani dashi azaman dandali don hasken circadian, wanda ke niyyar lafiyar ɗan adam. Hasken yana da tasiri mai zurfi akan barci, fargaba, ingantaccen aiki, da lafiya. Tsarin hasken farin-LED mai kunnawa za a iya amfani dashi don kula da yanayin circadian yadda ya kamata, yana ba da damar isasshen adadin farin haske da haske mai dumi, wanda ke inganta lafiya a cikin yanayin cikin gida.

Tsarin Tsarin Tsari

SIGOGI KANKANI TYP MAX UNIT
Ƙarfin wutar lantarki 35 - 42 V
Output (LED) current 0 - 700 mA
Switching frequency - 600 - kHz
PWM dimming frequency 200 - 5000 Hz
Warm LED forward voltage 34 37 40 V
LED na sanyi voltage na gaba 35 38 41 V
Operating temperature -30 - ɗari °C

Tsarin Tsarin Zane

Tsarin tsarin yana ginu a kusa da SimpleLink CC2650 Wireless MCU LaunchPad Kit, wanda ke sarrafa TPS92513HV buck LED drivers guda biyu don maɗaurin LED na dumi da sanyi. Ɗauki hoto ya haɗa da:

  • CC2650 Wireless MCU: Yana PWM siginonin domin sarrafa haske da kuma sarrafa haɗin Bluetooth
  • TPS92513HV Buck LED Drivers: Masu tuƙa biyu masu zaman kansu don ɗakunan LED masu dumi da sanyi tare da haɗaɗɗun daidaita halin yanzu na analog
  • OPA376 Op-Amps: Buffer na tsarkake siginonin PWM don sarrafa duhunancin analog
  • OPT3001 Ambient Light Sensor: Yana ba da damar girbi hasken rana da kuma fitar da haske akai-akai
  • LMT84 Temperature Sensor: Yana duba zafin ma'aunin zafi don kariya daga zafi
  • RC Low-Pass Filters: Canza siginar PWM zuwa ƙarfin lantarki na analog don saitin tunanin halin yanzu

Bayanin Zane: Tsarin yana karɓar shigarwar DC 35-42V kuma yana fitar da fitilun LED COB mai kunnawa 35W tare da keɓaɓɓun igiyoyin LED masu dumi da sanyaya, yana ba da damar daidaita zafin jiki daga 2500K zuwa 5700K.

Abubuwan da aka haskaka

TPS92513HV

1.5-A mai daidaita ƙararru (buck) tare da haɗaɗɗiyar MOSFET don tuƙa manyan fitilun LED.

  • 4.5-60V input voltage range
  • ±5% LED current accuracy
  • 100kHz to 2MHz switching frequency
  • Keɓantaccen shigarwar PWM dimming
  • Haɗaɗɗen 220-mΩ high-side MOSFET

CC2650

Wireless MCU targeting Bluetooth Smart, ZigBee, and 6LoWPAN applications.

  • 32-bit ARM Cortex-M3 processor at 48MHz
  • Mai sarrafa firikwensin mai ƙarancin wutar lantarki
  • BLE controller embedded in ROM
  • 128KB Flash, 20KB SRAM
  • Tsarin na'urorin da suka haɗa da I²C, UART, SPI

OPT3001

Na'urar hasken muhalli tare da tacewa ta gani mai ma'ana don dacewa da amsa idon mutum.

  • Rejects >99% of IR
  • 0.01 lux zuwa 83k lux auna kewayon
  • 23-bit tasiri kewayon
  • Low operating current: 1.8µA
  • I²C compatible digital output

OPA376

Low-noise operational amplifier with e-trim, offering outstanding DC precision and AC performance.

  • Low noise: 7.5 nV/√Hz at 1 kHz
  • Low offset voltage: 5µV typical
  • 5.5 MHz gain bandwidth product
  • Rail-to-rail input and output
  • 2.2V zuwa 5.5V wadata ƙarfin lantarki

LMT84

Madaidaicin CMOS zafin jiki na'ura mai auna tare da fitarwa analog ƙarfin lantarki sabanin daidai da zafin jiki.

  • ±0.4°C madaidaicin daidaito
  • -50°C zuwa 150°C kewayon zafin jiki
  • Low 5.4-µA quiescent current
  • -5.5 mV/°C average sensor gain
  • Low 1.5-V operation

Ka'idar Zane na Tsarin

LEDs suna buƙatar kullum na yanzu tuƙi da kuma haske farin tunable yana buƙatar halin yanzu a cikin daban-daban LED kirtani biyu da za a bambanta da kuma sarrafa. Wani tunable farin LED hasken wuta yana buƙatar wani AC-DC kullum ƙarfin lantarki wadata hade da biyu DC-DC buck halin yanzu masu gudanarwa don bambanta halin yanzu ta hanyar LED kirtani.

TIDA-01096 dandalin yana amfani da TPS92513HV buck LED direbobi guda biyu tare da haɗakar daidaitawar analog na yanzu don sarrafa halin yanzu ta hanyar zaren LED mai dumi da sanyi. TPS92513/HV LED direbobi suna fasalolin keɓantaccen shigarwa don analog da faɗin faɗin faɗin faɗi (PWM) don sarrafa haske maras sulhu don cimma ma'auni fiye da 100:1.

Ana sarrafa buck LED direbobi ta SimpleLink CC2650 Wireless MCU LaunchPad kitti, wanda ke samar da PWM guda biyu don PWM dimming na duka zaren. Cimma analog dimming yana buƙatar m shigarwar analog guda biyu don saita IADJ na buck LED direbobi. M IADJ ana samunsa ta amfani da PWM daga na'urar CC2650 azaman mai canza dijital zuwa analog (DAC). Don wannan tsari, PWM da aka samar daga na'urar CC2650 yana tacewa ta hanyar tace low-pass RC mai mataki huɗu kuma ana tace fitarwa ta amfani da op amp OPA376.

Design Equations

The design includes comprehensive calculations for:

  • Undervoltage Lockout Setting: R1=120kΩ da R6=5kΩ sun UVLO a 30.5V
  • Sauyin Mitar Mita: RRT=190.63kΩ ya saita fSW=600kHz
  • LED na Saitin Akwati: RISENSE=0.05Ω for maximum 700mA LED current
  • Analog Dimming Filter: Four-stage RC filter with cutoff frequency of 391Hz
  • Zabi Inductor: An lissafta don 275mA karkatwar ruwa a cikin cikakken kaya
  • Fitarwa Capacitor: 4.7μF an zaɓa don cimma 5mA LED ɗimbin yawa na halin yanzu

Dabarun Dushe Hasken Wuta

Zane yana aiwatar da hanyoyin dushewa daban-daban guda uku don samar da sassauci da haɓaka aiki don yanayin aiki daban-daban:

Analog Dimming

Amfani da filashin IADJ don saita halin yanzu na LED a hankali. Yana da inganci tare da ƙarancin EMI amma yana iya haifar da bambancin zafin launi a ƙananan halin yanzu.

  • Yana amfani da PWM da aka tace ta hanyar tacewar RC mai matakai 4
  • Yana ba da ƙuduri na bit goma sha biyu
  • Ƙarin inganci: har zuwa kashi 98 cikin ɗari
  • 1:25 contrast ratio

PWM Dimming

Amfani da fil PDIM don kunna/ kashe direban ƙofar. Yana guje wa matsalolin zafin launi a ƙananan igiyoyin kuma yana ba da ƙuduri mafi girma.

  • Kewayon mitar 200Hz zuwa 5kHz
  • Sarrafa kai tsaye na direban ƙofar
  • Kyakkyawan dimming linearity a ƙananan igiyoyin wutar lantarki
  • 1:50 contrast ratio

Hybrid Dimming

Yana haɗa hanyoyin biyu - analog don ingantacciyar amfani da PWM don daidaitawa mai kyau da ƙarin ƙuduri a ƙananan igiyoyin lantarki.

  • Yana inganta ingantacciyar amfani da ƙuduri
  • Analog don yankin gudun haske na asali
  • PWM don daidaitawa mai kyau a ƙananan igiyoyin lantarki
  • Mafi kyawun dabarun biyu

Aiki mara flicker: Zane zai iya cimma aiki mara flicker har zuwa 6mA fitarwar na'ura ta hanyar gyara resistor na'ura daga 50mΩ zuwa 250mΩ, yana ba da damar haske mai ingoci ko da a matakan haske masu ƙarancin ƙarfi.

Test Data & Performance

Comprehensive testing demonstrates the excellent performance of the design across various operating conditions:

Efficiency Performance

  • Analog Dimming: 98.15% peak efficiency at full load, maintaining >95% efficiency down to 20% load
  • PWM Dimming (1kHz): 97.39% inganci a 100% aikin hidima, sannu a hankali yana raguwa zuwa 84.88% a 3% aikin hidima
  • PWM Dimming (5kHz): 97.82% efficiency at ɗari% duty cycle, maintaining >90% efficiency down to 5% duty cycle
  • Input Voltage Variation: Inganci ya ci gaba da kasancewa sama da kashi 97% a cikin kewayon shigarwar 35V zuwa 48V

Ayyukan Fari Mai Daidaitawa

Tsarin yana kiyaye daidaitawan zafin launi yadda ya kamata a matakan haske daban-daban:

  • Hasken 100%: Ingantaccen tsarin yana tsakanin 97.27% (farin sanyi) zuwa 98.15% (farin dumi)
  • Hasken 75%: Ingantaccin yana kewayo daga 97.24% zuwa 98.01% a fadin yanayin zafin launi
  • 50% Hasken Hasken: Ingantaccin yana kewayo daga 97.18% zuwa 98.31% a fadin kewayon daidaitawa

Ayyukan Sensor

  • OPT3001 Ambient Light Sensor: Yana ba da daidaitattun ma'aunin haske daga lux 2.57 zuwa lux 12,902
  • LMT84 Temperature Sensor: Yana lura da zafin ma'aunin zafi daga 36.21°C zuwa 61.60°C a ƙarƙashin yanayi daban-daban na kaya

Design Files & Resources

The complete design package includes all necessary files for implementation:

  • Schematics: Cikakken zane-zanen da'irar tsarin LED driver
  • Lissafin Kayan Aiki: Cikakken jerin sassa tare da nassosin masana'anta
  • Tsarin PCB: Gerber files da shawarwarin shimfidarwa
  • Altium Project: Cikakken fayilolin aikin zane
  • Assembly Drawings: Zayyana kayan haɗin gwiwa
  • Software Files: Firmware don CC2650 MCU tare da haɗin BLE

Yankunan Aikace-aikace: Wannan zanen tunani ya dace don hasken LED na cikin gida (mazauni, dillali, liyafar, hasken accent), tsarin hasken da ke haɗe ta mara waya, da aikace-aikacen hasken LED na DC ƙarancin ƙarfi waɗanda ke buƙatar daidaitaccen sarrafa zafin jiki da haɗin mara waya.

Lura: Wannan taƙaitaccen bayani ne na ƙirar tunani. Cikakken takardar PDF ta ƙunshi cikakkun zane-zane, jagororin shimfidawa, cikakkun bayanan aiwatarwa na firmware, da kuma faɗaɗɗen bayanan gwaji. Muna ba da shawarar saukar da cikakken PDF don cikakkun bayanan aiwatarwa.