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Renesas ISL78365ARZ
- Part No.:
- ISL78365ARZ
- Manufacturer:
- Renesas
- Package:
- -
- Datasheet:
-
ISL78365ARZ.pdf
- Description:
- IC REG 40QFN
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Product details
Overview
ISL78365ARZ from Renesas (formerly Intersil) is an automotive-grade, high-speed quad laser diode driver IC designed for RGB/RGGB laser scanning projection systems. It delivers up to 750mA peak current per channel, supports 150MHz pixel clock, and features independent threshold/color DACs with scaling for brightness control and APC. It operates from a single 3.3V supply with 1.8V–3.3V video interface compatibility and is AEC-Q100 qualified for under-hood automotive use.
For engineers reviewing the ISL78365ARZ datasheet, ISL78365ARZ pinout, ISL78365ARZ application, or ISL78365ARZ equivalent, key selection criteria include its 40-pin WQFN package, 1.5ns rise/fall times, dynamic power management (DPM) outputs, RTZ programmability, and support for double-data-rate parallel video input across four independently controlled laser channels.
Technical Context
The ISL78365ARZ integrates four matched current-output drivers with per-channel 10-bit color and threshold DACs, each scaled via dedicated analog scale DACs to enable precise laser intensity calibration and Automatic Power Control. Its parallel video interface accepts 10-bit pixel data on both clock edges (DDR), supporting three- or four-color sequencing modes.
It embeds a Laser Voltage Sampler with Dynamic Power Optimizer™ that adjusts headroom voltage in real time using DPM1–DPM4 current-sink outputs, reducing system power dissipation. The device also includes a 3-wire SPI interface for configuration, programmable RTZ pulse generation, and blanking-time power reduction - all operating across –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Pixel Clock | 150MHz DDR - enables high-resolution, high-frame-rate laser scanning at >300 MSPS effective data rate |
| Peak Output Current | 750mA per channel - drives high-brightness laser diodes without external boost stages |
| Rise/Fall Time | 1.5ns - ensures crisp, distortion-free pixel edges in scanning projection |
| Operating Temp | –40°C to +125°C - meets automotive under-hood thermal requirements |
| Supply Voltage | 3.3V analog/digital core with 1.8V/2.5V/3.3V configurable I/O - simplifies interface to FPGA/ASIC video sources |
| AEC-Q100 Grade | Grade 1 - certified for automotive safety-critical display and HUD applications |
| Interface Type | 10-bit parallel DDR + 3-wire SPI - separates high-speed pixel streaming from low-speed configuration |
Pinout & Package
The ISL78365ARZ is housed in a 40-lead, 6mm × 6mm, 0.5mm pitch Wettable Flank Quad Flat No-lead (WQFN) package (PKG DWG L40.6x6C) with exposed thermal pad (EPAD) for enhanced heat dissipation in automotive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D[0..9] | Parallel video data inputs | 10-bit DDR pixel bus - latched on both CLK edges; voltage level set by VSL |
| IOUT1–IOUT4 | Current-sink laser driver outputs | Four independent, 750mA-capable outputs sinking laser cathodes to PGND |
| DPM1–DPM4 | Analog current outputs | Dynamic headroom control pins - sink current to adjust compliance voltage per channel |
| RSET | Bias reference terminal | Connects to 13kΩ resistor to ground to set full-scale DAC current reference |
| VDD_DAC, VDD_A1, VDD_A2, VDD | Power domains | Separate 3.3V supplies for DACs, DPM circuits, and digital/analog blocks - enable localized decoupling |
| VSL | I/O voltage reference | Sets logic threshold for CLK, D[0:9], SYNC, RTZ, LOWP, SCLK, SDIO, SEN - must match source voltage |
Key Features
| Feature | Design Value |
|---|---|
| Independent per-channel DACs | Separate 10-bit color + threshold DACs with scaling allow individual laser calibration and APC loop tuning |
| Dynamic Power Optimizer™ | Real-time headroom adjustment via DPM1–DPM4 reduces power loss in laser bias circuitry by >30% vs fixed-headroom designs |
| Programmable RTZ mode | Multi-pulse Return-to-Zero output shaping via register 0x08[7:6] improves laser stability and reduces thermal drift |
| Blanking-time power reduction | Automatic current shutdown during non-active pixel periods cuts quiescent power by up to 45% |
| Flexible RGB ordering | Configurable data sequence mapping supports arbitrary LD placement (e.g., R-G-G-B or G-R-B-G) without hardware changes |
Applications
| Laser Scanning HUD | Automotive RGB Laser Projector |
|---|---|
Use Scenario: Head-up display projecting speed, navigation, and ADAS alerts onto windshield using scanned red/green/blue lasers. IC Role / Device Role / Timing Role: Quad-channel laser driver synchronizing pixel timing to MEMS mirror scan clock; provides sub-nanosecond edge fidelity for sharp text rendering. Use Value: Enables <1.5ns edge transitions and 150MHz pixel rate required for 1920×720@60Hz HUD resolution with zero motion blur. | Use Scenario: Compact in-vehicle entertainment projector using RGB lasers and MEMS scanning for rear-seat displays. IC Role / Device Role / Timing Role: Central pixel-current controller interfacing with video ASIC via DDR parallel bus; manages laser brightness via per-channel DAC scaling. Use Value: Delivers 750mA/channel drive with independent threshold/color control to maintain color accuracy across temperature and aging. |
| Automotive LiDAR Calibration Source | High-Speed Laser Test Fixture |
Use Scenario: Reference light source for calibrating time-of-flight (ToF) LiDAR receivers using precisely timed multi-pulse sequences. IC Role / Device Role / Timing Role: Precision current source generating programmable RTZ pulses synchronized to external trigger (SYNC/CLK). Use Value: RTZ function and 1.5ns edges ensure sub-10ps jitter in pulse timing - critical for picosecond-level ToF measurement accuracy. | Use Scenario: Production test bench verifying laser diode forward voltage, threshold current, and modulation response. IC Role / Device Role / Timing Role: Stimulus generator applying calibrated current pulses while monitoring MON and DPM outputs for real-time feedback. Use Value: Integrated laser voltage sampler and DPM outputs enable closed-loop characterization without external sense circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar laser diode driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5940QPWPRQ1 | 16-channel, 12-bit PWM LED driver; no laser-specific voltage sampling or DPM; max 120mA/channel | Designed for LED backlighting and signage; lacks RTZ, APC, or laser voltage feedback | Use only for low-current RGB indicator or auxiliary lighting - not suitable for scanning projection or LiDAR calibration |
| MAX20052ATP/V+T | Quad-channel, 500mA laser driver; no DDR interface; uses serial pixel loading; no DPM or RTZ | Targeted at automotive cabin ambient lighting; lacks high-speed parallel interface and precision APC architecture | Consider only for cost-sensitive, lower-bandwidth laser applications where 150MHz pixel clock and sub-ns edges are unnecessary |
Compared with TLC5940QPWPRQ1 and MAX20052ATP/V+T, the ISL78365ARZ uniquely combines 750mA/channel drive, 150MHz DDR interface, integrated laser voltage sampling, and DPM-based dynamic headroom control - making it the only option qualified for AEC-Q100 Grade 1 RGB scanning projection and LiDAR reference systems.
Availability
ISL78365ARZ is available at Aetrix Electronics and suitable for automotive head-up displays, RGB laser projectors, and LiDAR calibration systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for ISL78365ARZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and infrastructure markets.
The ISL78365ARZ belongs to Renesas' automotive analog power portfolio, engineered specifically for high-fidelity, high-reliability laser projection and sensing systems requiring precise current control, ultrafast switching, and robust operation across extreme temperatures.
FAQ
What is the maximum supported pixel clock frequency for the ISL78365ARZ?
The ISL78365ARZ supports a maximum pixel clock frequency of 150MHz in double-data-rate (DDR) mode, enabling an effective data throughput of 300 million pixels per second. This specification is validated across the full –40°C to +125°C operating range and is essential for high-resolution laser scanning applications such as automotive HUDs. The ISL78365ARZ achieves this performance using optimized internal clock paths and strict signal integrity requirements on the CLK pin.
Does the ISL78365ARZ support Automatic Power Control (APC) functionality?
Yes, the ISL78365ARZ supports APC through its integrated laser voltage sampler and dynamic power optimizer architecture. By monitoring laser diode voltage via the internal sampler and adjusting DPM1–DPM4 outputs, the ISL78365ARZ maintains constant optical output power despite temperature drift or aging. This closed-loop capability is implemented entirely within the ISL78365ARZ without requiring external op-amps or ADCs.
What is the purpose of the RSET pin on the ISL78365ARZ?
The RSET pin on the ISL78365ARZ sets the full-scale current reference for all four output drivers. A 13kΩ ±1% resistor connected from RSET to ground configures the ISL78365ARZ for 750mA peak output per channel. Placement of this resistor must be within 2mm of the RSET pin to minimize noise coupling, and the pin must not be left floating or shorted - doing so invalidates output current accuracy and may damage the device.
Can the ISL78365ARZ drive laser diodes with different forward voltages across its four channels?
Yes, the ISL78365ARZ supports independent voltage headroom control per channel via DPM1–DPM4. Each DPM pin sinks current to dynamically adjust the compliance voltage supplied to its corresponding IOUT driver, allowing the ISL78365ARZ to efficiently drive lasers with mismatched forward voltages (e.g., red ~2.2V, blue ~4.8V) while minimizing power loss. This eliminates the need for discrete DC-DC converters per channel.
Is the ISL78365ARZ pin-compatible with any other Renesas laser driver ICs?
No, the ISL78365ARZ has a unique 40-pin WQFN footprint and pin assignment optimized for its quad-channel DDR interface, DPM architecture, and laser-specific features. It is not pin-compatible with ISL78322, ISL78310, or other Renesas laser drivers. Migration requires PCB layout revision and firmware adaptation due to differences in interface protocol, register map, and power domain routing.
ISL78365ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tray
- Product Status:
- Last Time Buy
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
ISL78365ARZ FAQ
1.How can I place an order for ISL78365ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL78365ARZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISL78365ARZ reliable?
The price and inventory of ISL78365ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL78365ARZ is usually 5 days.
3.What payment methods are accepted for ISL78365ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL78365ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL78365ARZ?
ISL78365ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL78365ARZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISL78365ARZ?
For technical support, including ISL78365ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL78365ARZ requirements.
6.How does Aetrix verify that ISL78365ARZ is sourced from the original manufacturer or authorized distributors?
All ISL78365ARZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL78365ARZ meets industry standards.
7.What is the process for return or replacement of ISL78365ARZ?
All ISL78365ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL78365ARZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISL78365ARZ part is unused and in its original packaging.
Return procedure for ISL78365ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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