The ISL78171 is a 6-channel, 50mA, LED driver capable of very high dynamic range dimming. It offers an integrated boost converter, six high precision, adjustable current sinks and a SMBus/I2C interface for digital programmability and extensive diagnostics. These features provide the ISL78171 with the capabilities to design a compact, highly versatile LED backlight for a wide variety of ambient lighting conditions.
The integrated peak current mode PWM boost converter operates with a constant frequency and can boost an input voltage range of 4.5V - 26.5V to an output up to 40V and supply six strings of LEDs with up to 50mA each. A dynamic headroom control circuit detects and regulates the highest voltage string to improve efficiency in multistring configurations.
The six high precision adjustable current sinks offer typical current matching better than ±1% and a dimming ratio capable of exceeding 60,000:1. The dimming ratio can be adjusted with either or both the I2C/SMBus and an external PWM signal. They also feature an optional channel phase shift control which helps to reduce the input and output capacitance and ripple, to improve efficiency and to prevent audible noise.
The SMBus/I2C interface offers a wide range of programmability that includes the boost FET slew rate control, individual string enabling, and converter switching frequency selections. It offers a wide range of protection features and diagnostics that cover all perceivable faults, enabling the system to self-diagnose the functioning of the backlight and react to such conditions as failed LEDs. The ISL78171 is offered in a compact and thermally efficient 20 Ld QFN package with an ambient temperature range of -40°C to +105°C.
LED Driver IC 6 Output DC DC Regulator Step-Up (Boost) Analog, I²C, PWM Dimming 50mA 20-QFN (3x4)
IC LED DRVR RGLTR PWM 50MA 20QFN Product overview: ISL78171ARZ from Renesas Electronics Corporation is a LED Driver IC for LED lighting, display backlights, indicator control, automotive lighting, signage, and regulated current drive circuits. It is useful for engineers and buyers comparing datasheets, replacement parts, BOM lines, package options, lifecycle status, and procurement availability. Key searchable attributes include 50MA. Search-friendly keywords include LED driver IC, constant current, lighting control, display backlight, 50MA, External/Internal LED Drivers. This listing supports clearer product discovery for industrial, commercial, repair, automation, power, sensing, and embedded system projects. Product number 137-ISL78171ARZ can be used for catalog matching and distributor lookup.
Win Source Part Number: 1378679-ISL78171ARZ
Category: Integrated Circuits (ICs) - Power Management (PMIC) - LED Drivers
Temperature Range - Operating: -40°C ~ 105°C (TA)
Fake Threat In the Open Market: 40 pct.
Type: DC DC Regulator
MSL Level: 1 (Unlimited)
Mfr: Renesas Electronics America Inc
Series: Automotive, AEC-Q100
Package: Tube
Product Status: Active
Frequency: 600kHz, 1.2MHz
Package / Case: 20-VFQFN Exposed Pad
Supplier Device Package: 20-QFN (3x4)
Base Product Number: ISL78171
Mounting Type: Surface Mount
HTSUS: 8542.39.0001
Applications: Automotive, Backlight
REACH Status: REACH Unaffected
ECCN: EAR99
Topology: Step-Up (Boost)
Internal Switch(s): Yes
Number of Outputs: 6
Voltage - Supply (Min): 4.5V
Voltage - Supply (Max): 26.5V
Voltage - Output: 40V
Current - Output / Channel: 50mA
Dimming: Analog, I²C, PWM
IC LED DRVR RGLTR PWM 50MA 20QFN
IC LED DRIVER RGLTR DIM 20QFN
| Renesas Electronics Corporation | DigiKey | ERSAELECTRONICS PTE. LTD. | Win Source Electronics | Shenzhen Shengyu Electronics Technology Limited | Lingto Electronic Limited | |
|---|---|---|---|---|---|---|
| Product Category | LED Drivers | LED Drivers | LED Drivers | LED Drivers | LED Drivers | LED Drivers |
| Product Number | ISL78171ARZ | ISL78171ARZ-ND | 137-ISL78171ARZ | 1378679-ISL78171ARZ | ISL78171ARZ | ISL78171ARZ |
| Product Name | 6-Channel, 50mA Automotive LED Driver with Ultra-high Dimming Ratio and Phase Shift Control | LED Drivers | 50MA LED Driver IC | Integrated Circuits (ICs) - Power Management (PMIC) - LED Drivers | Integrated Circuits (ICs) - Power Management (PMIC) - LED Drivers | PMIC - LED Drivers |
| Form Factor | Intgrated Circuit (IC) | Intgrated Circuit (IC) | Intgrated Circuit (IC) | |||
| Input Voltage | 4.5 to 26.5 volts | 4.5 to 26.5 volts | 4.5 to 26.5 volts | 4.5 to 26.5 volts | ||
| Output Voltage | 40 volts | 40 volts | 40 volts | 40 volts | ||
| Output Current | 50 milliamps | 50 milliamps | 50 milliamps | |||
| Efficiency | 92.9 % |
