Infineon公司的TLD5098是內(nèi)置了保護(hù)特性的LED升壓控制器,可以調(diào)節(jié)恒定LED電流,以保證LED色彩精度和有較長(zhǎng)壽命.器件具有多種配置如升壓,降壓,降-升壓,SPEIC和反激等.輸入電壓從4.5V到45V,開(kāi)關(guān)頻率從100 kHz到500 kHz,具有多種保護(hù)功能,主要用在汽車(chē)內(nèi)外照明.本文介紹了TLD5098主要特性,框圖,多種配置下的應(yīng)用電路和相應(yīng)的材料清單,以及LITIX™ Power TLD5098EL應(yīng)用板主要特性,電路圖和材料清單.

The TLD5098EL is a LED boost controller with built in protecTIon features. The main funcTIon of this device is to regulatea constant LED current. The constant current regulaTIon is especially beneficial for LED color accuracy and longer lifetime.

The controller concept of the TLD5098EL allows multiple configurations such as Boost, Buck, Buck-Boost, SEPIC andFlyback by simply adjusting the external components. The TLD5098EL offers the most flexible dimming options. Dimmingcan be achieved with analog or PWM input.The switching frequency is adjustable in the range of 100 kHz to 500 kHz andcan be synchronized to an external clock source. The TLD5098EL features an enable function reducing the shut-downcurrent consumption to Iq_OFF< 10 μA. The current mode regulation scheme of this device provides a stable regulationloop maintained by small external compensation components. The integrated soft start feature limits the current peak aswell as voltage overshoot at start-up. This IC is suited for use in the harsh automotive environments and provides outputovervoltage protection, device overtemperature shutdown and short circuit to GND protection.

• Wide Input Voltage Range from 4.5 V to 45 V
• Constant Current or Constant Voltage Regulation
• Drives LEDs in Boost, Buck, Buck-Boost, SEPIC and FlybackTopology
• Very Low Shutdown Current: Iq_OFF< 10 μA
• Flexible Switching Frequency Range, 100 kHz to 500 kHz
• Synchronization with external clock source
• PWM Dimming
• Analog Dimming feature to adjust average LED current
• Internal 5 V Low Drop Out Voltage Regulator
• Open Circuit Detection
• Short to GND Protection
• Output Overvoltage Protection
• Internal Soft Start
• Over Temperature Shutdown
• Wide LED current range via simple adaptation of external components
• 300mV High Side Current Sense to ensure highest flexibility and LED current accuracy
• Available in a small thermally enhanced PG-SSOP-14 package
• Automotive AEC Qualified
• Green Product (RoHS) Compliant

• Automotive Exterior and Interior Lighting

圖1.TLD5098框圖

圖2. TLD5098應(yīng)用電路圖:B2G配置
圖2應(yīng)用電路材料清單:

圖3. TLD5098 SEPIC應(yīng)用電路圖:降壓-升壓配置
圖3 TLD5098 SEPIC應(yīng)用電路材料清單:

圖4. TLD5098反激應(yīng)用電路圖:降壓-升壓配置
圖4 TLD5098反激應(yīng)用電路材料清單:

圖5. TLD5098升壓-電池應(yīng)用電路圖:B2B(降壓-升壓配置)
圖5TLD5098升壓-電池應(yīng)用電路圖材料清單:

圖6. TLD5098降壓應(yīng)用電路圖
圖6 TLD5098降壓應(yīng)用電路圖材料清單:

圖7. TLD5098升壓應(yīng)用電路圖
圖7 TLD5098升壓應(yīng)用電路圖材料清單:

LITIX™ Power TLD5098EL應(yīng)用板

The size of the application boards is 4.5 cm x 4 cm and the connections to the power supply and external load can be established with cables.

The application boards in combination with real loads enable fast and realistic application prototyping and could be very beneficial for constructing initial system demonstrators.

The layout of these boards is optimized for EMC and can be reused for customer applications.

圖8.LITIX™ Power TLD5098EL應(yīng)用板外形圖:B2G配置

圖9.LITIX™ Power TLD5098EL應(yīng)用板電路圖:B2G配置
LITIX™ Power TLD5098EL應(yīng)用板材料清單:B2G配置