TLD55012QVXUMA1

TLD5501-2QV Dual SYNC Buck Controller with SPI Interface Infineon LITIX Power Flex Package PG-VQFN-48 Marking TLD55012QV Sales Name TLD5501-2QV 1 Overview Features Dual-Channel synchronous DC/DC Controller for HIGH POWER LED drivers Wide LED forward voltage Range (2 V up to 50 V) Wide VIN Range (IC 4.5 V to 40 V, Power 4.5 V to 55 V) Switching Frequency Range from 200 kHz to 700 kHz SPI for diagnostics and control Maximum Efficiency in every condition (up to 96%) Constant Current (LED) and Constant Voltage Regulation Limp Home Function (Fail Safe Mode) EMC optimized device: Features an auto Spread Spectrum LED current sense with dedicated monitor Output Advanced protection features for device and load Enhanced Dimming features: Analog and PWM dimming LED current accuracy +/- 3% Available in a small thermally enhanced PG-VQFN-48 package Automotive AEC Q100 Grade 1 (-40C to 125C) qualified V CIVCC bat C IN1 V POW D1 IVCC ext C IN2 BST1 PWMI1 Digital dimminig CH1 CBST1 COMP1 M 1 HSGD1 L 1 C C SOFT START1 OUT11 OUT12 COUT13 SWN1 R FB1 C Soft Start1 CCOMP1 M Channel 2 LSGD1 1 SWCS1 SET1 Analog Dimming CH1 RSWCS1 IOUTMON1 SGND1 Output Current Monitoring CH1 VFB1 Device Enable EN Fail Safe Activation FBH1 LHI Digital Supply (+5V) VDD FBL1 CSN PGND1 SI SPI V IVCC ext POW SO SCLK CIN3 SYNC C SYNC signal D2 RFREQ FREQ BST2 CBST2 PWMI2 M 3 HSGD2 Digital dimminig CH2 L2 C C C OUT21 OUT22 OUT23 SWN2 R FB2 COMP2 M SOFT START2 4 Channel LSGD2 SWCS2 2 C RSWCS2 Soft Start2 SGND2 CCOMP2 VFB2 SET2 FBH2 Analog Dimming CH2 FBL2 IOUTMON2 PGND2 Output Current Monitoring CH2 VSS AGND Figure 1 Application Drawing - TLD5501-2QV as current regulator Datasheet 1 Rev. 2.00 www.infineon.com 2021-03-26 R COMP2 RCOMP1 VIN IVCC R R R R VFBL2 VFBH2 VFBL1 VFBH1 TLD5501-2QV Dual SYNC Buck Controller with SPI Interface Overview Description The TLD5501-2QV is a synchronous DUAL Channel DC/DC buck controller with built in protection features and SPI interface. This concept is beneficial for driving high power LEDs with maximum system efficiency and minimum number of external components. The TLD5501-2QV offers both analog and digital (PWM) dimming. The switching frequency is adjustable in the range of 200 kHz to 700 kHz. It can be synchronized to an external clock source. A built in programmable Spread Spectrum switching frequency modulation and the forced continuous current regulation mode improve the overall EMC behavior. Furthermore the current mode regulation scheme provides a stable regulation loop maintained by small external compensation components. The adjustable soft start feature limits the current peak as well as voltage overshoot at start-up. The TLD5501-2QV is suitable for use in the harsh automotive environment. Table1 Product Summary Power Stage input voltage range V 4.5 V 55 V POW Device Input supply voltage range V 4.5 V 40 V VIN Maximum output voltage (depending by the V 50V OUT(max) application conditions) Switching Frequency range f 200 kHz ... 700 kHz SW Typical NMOS driver on-state resistance at R 2.3 DS(ON PU) T = 25C (Gate Pull Up) j Typical NMOS driver on-state resistance at R 1.2 DS(ON PD) T = 25C (Gate Pull Down) j SPI clock frequency f 5MHz SCLK(MAX) Protective Functions Over load protection of external MOSFETs Shorted load, output overvoltage and overcurrent protection Input undervoltage protection Thermal shutdown of device with autorestart behavior Electrostatic discharge protection (ESD) Diagnostic Functions Latched diagnostic information via SPI Open load detection in ON-state Device Overtemperature shutdown and Temperature Prewarning Smart monitoring and advanced functions provide I information LED Limp Home Function Limp Home activation via LHI pin Applications Especially designed for driving high power LEDs in automotive applications Automotive Exterior Lighting: full LED headlamp assemblies (Low Beam, High Beam, Matrix Beam, Pixel Light) General purpose current/voltage controlled DC/DC buck LED driver Datasheet 2 Rev. 2.00 2021-03-26