PT16752
DESCRIPTION
The PT16752 is a Headlight LED controller for automotive with high accuracy peak current mode. The device implements a fixed-frequency peak current mode control technique with programmable switching frequency, slope pensation, and soft-start timing. A unique spreadspectrum modulation (SSM) can reduce emission (EMI) at the switching frequency and its harmonics. The controller is designed to support a range of 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 140°C and output voltage range of 3V to 65V. This LED controller can independently modulate LED current using either analog or PWM dimming techniques (PT16752 only). Linear analog dimming response with 15:1 range is obtained by...
