Introduction; Features; Applications - Infineon ILD8150 Operation, Design Manual And Performance

ILD8150 80 V high side buck LED driver IC with hybrid dimming

Introduction

1 Introduction
This application note explains the operation of Infineon's high-side MOSFET buck LED driver IC ILD8150.
ILD8150 provides a highly efficient solution, with multiple protection features, superior hybrid PWM dimming
performance and high accuracy across all conditions – input/output voltage, dimming and temperature.
ILD8150 is a next-generation buck DC-DC LED driver recommended for general LED lighting. The target
application is a secondary stage together with AC-DC such as Power Factor Correction (PFC) flyback or PFC +
LLC. ILD8150 is flexible enough to use up to 1.5 A. The hysteretic current control is extremely fast and always
stable without the need for any loop compensation. A maximum duty cycle of up to 99 percent enables use in
applications where the input and output voltage are close to each other. It is suitable for applications with a
wide range of supply voltages from 8 V to 80 V, which gives flexibility and a clear advantage over existing 60 V
solutions.
ILD8150 operates in hybrid dimming mode, which helps to minimize LED color shift and audible noise. In the
range 12.5 to 100 percent it operates in analog dimming mode, and from 0.5 to 12.5 percent in PWM mode with
fixed output frequency f
ILD8150 provides high accuracy across all conditions, as well AC 100 or 120 Hz input flicker rejection across the
whole dimming range.
1.1

Features

Wide input voltage range from 8 V to 80 V

Capable of providing output current up to 1.5 A

Up to 2 MHz switching frequency

Digital soft-start

PWM dimming input up to 20 kHz

Hybrid output dimming

Typical ±3 percent output current accuracy

Very low LED current drift over-temperature

Under-Voltage Lockout (UVLO)

Cycle-by-cycle current limitation

Shut-down mode with low self-consumption

PG-DSO-8 package with and without exposed pad

Over-Temperature Protection (OTP)

1.2

Applications

LED driver for general lighting

with single output channel
−
with two output channels for tuneable white light
−
LED driver for horticultural lighting

with multiple output channels
−
Application Note
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3 of 28 V 1.0
2019-01-23