Automotive Exterior


PT16755

PT16755 is a 1ch high current LED Controller, supports step-up or step-down driver topologies. It incorporates a high voltage (65V) rail-to-rail current sense amplifier that can directly measure LED current using a high-side series sense resistor. The amplifier is designed to achieve low input offset voltage and attain better than ±4% LED current accuracy over junction temperature range of -40°C to 150°C and output voltage range of 2V to 65V.

The device implements a fixed-frequency peak current mode control technique with programmable switching frequency. A unique spread-spectrum modulation (SSM) can reduce emission (EMI) at the switching frequency and its harmonics.

PWM dimming duty can be freely set with built-in PWM generation circuit. PDRV gate driver output can be used to enable series FET dimming functionality to get over 1000:1 contrast ratio (fPWM=400Hz).

PT16755 has two systems of analog dimming function. It can be used as BIN setting function and thermal derating function. High precision 3.0V output power supply for analog dimming and PWM dimming setting is built-in. An open drain fault indicator output to indicate LED overcurrent, short-current, output overvoltage and output under-voltage conditions.


FEATURES


● Automotive AEC-Q100, Grade 1 (-40°C ~ +125°C) Qualified

● Input Voltage Range: 5V to 65V

● Output Voltage Range: 2V to 65V

● Low Input Offset Rail-to-Rail Current Sense Amplifier

– Better than ±4% LED Current Accuracy over -40°C to 150°C Junction Temperature Range

–High-Side Current Sense

● Two Analog Dimming systems

● Integrated P-Channel MOSFET Driver for LED PWM Dimming, Compatible with Direct PWM Input with over 1000:1 Dimming Range (fPWM=400Hz)

● Spread Spectrum Modulation for Improved EMI

● Programmable Switching Frequency: 100 kHz to 1.1 MHz

● Comprehensive Fault Protection Circuitry Including VCC Under-Voltage Lockout (UVLO), Output Over-Voltage Protection (OVP), Output Under-Voltage Protection (UVP), Output over current protection (OCP), Output short-current protection(SCP), Cycle-by-Cycle Switch Current Limit and Thermal Protection

● Package Type- HTSSOP 20

APPLICATIONS


● Automotive High(Low) Beam Application

● Automotive Daytime Running Lights and Position Lights

● LED General Lighting Applications

●Exit Signs and Emergency Lighting

資源下載

Documentation

TitleFileVersionDate
PT16755PT16755.pdfV1.12025/5/1
BUCK-BOOST and BOOST test reportPT16755 BUCK-BOOST and BOOST test report_20250312.pdfREV2.02025/3/12
BUCK-BOOST DEMOPT16755_BUCK-BOOST_DEMO_20241028.pdf  
SEPIC test reportPT16755 SEPIC test report_20250704.pdfV3.02025/7/4
SEPIC DEMOPT16755_SEPIC_DEMO_20250226.pdf  

Tools

Application Note