NCV7685DQR2G - 12-Ch 60mA LED Linear Driver, I2C, Automotive | onsemi
料号： NCV7685DQR2G ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.21 | $221.00 |
| 500 | $1.95 | $975.00 |
| 1,000 | $1.72 | $1,720.00 |
| 2,500 | $1.55 | $3,875.00 |
NCV7685DQR2G 概述
A linear LED driver (also called linear current regulator or LED constant-current sink) is a class of power management IC that regulates the current flowing through each LED string by dissipating the excess input-to-LED voltage as heat on a linear regulator element. Linear LED drivers belong to the broader category of LED drivers, which sit inside power management semiconductors and are valued for their low EMI signature because they do not switch at high frequency like buck/boost converters. This makes linear drivers ideal for applications where conducted and radiated noise must be minimized, such as automotive rear-combination lamps, instrument clusters, and interior ambient lighting.
Key features of the NCV7685DQR2G include twelve 60 mA current sinks with shared reference, 128-step PWM dimming per channel, I2C addressable control, integrated thermal protection, and a PWM frequency that can be programmed through the serial interface. Each channel can be independently enabled or disabled and assigned its own duty cycle, enabling per-LED brightness control for animation effects. The device supports open-circuit, short-circuit, and over-temperature fault reporting through the I2C status registers.
Architecturally, the IC combines twelve matched low-side current mirrors with a single internal bandgap reference, providing channel-to-channel current matching within a tight tolerance suitable for uniform brightness across multi-LED strings. The SSOP-EP package with exposed pad provides a low thermal resistance path, allowing higher total dissipation at elevated ambient temperatures typical of underhood and lamp-housing environments.
Typical applications include automotive rear lamps (tail, brake, turn), daytime running lights, interior ambient lighting, instrument-panel backlighting, and status indicators where individual LED brightness control and fault diagnostics are required. It is also used in body-control modules and BCM-driven lighting subsystems.
A key design consideration is total power budget: at 60 mA per channel with all 12 channels active at full current, headroom voltage on each channel becomes heat. Designers should compute worst-case (VIN - VLED) x Iout and verify junction temperature against the SSOP-EP thermal resistance to avoid thermal shutdown. A trade-off versus switching LED drivers is lower EMI but higher dissipation.
This page synthesizes distributor pricing, drop-in same-package equivalents, and engineering design notes not found in the manufacturer datasheet alone.
直接替换替代料： NCV7685DQR2G ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
NCV7685DQG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
NCV7685DQR2G
✅ 直接替换✓ 有现货
$1.55 / 个
查看数据手册 →NCV7685PWR2G
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
NCV7685DQG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
NCV7684DQR2G
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
NCV7685DQR2G 最大额定值与电气特性
| 输出数量 | 12 |
| 拓扑 | Linear (constant-current sink) |
| Output Current per Channel | 60 mA (typical, programmable) |
| Dimming Method | PWM, 128 steps per channel |
| PWM Frequency | Programmable via I2C |
| Communication Interface | I2C serial |
| 封装 | 24-SSOP-EP (exposed pad) |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +125C (automotive grade) |
| Automotive Qualification | AEC-Q100 qualified |
| Fault Detection | Open-circuit, short-circuit, over-temperature |
| Channel Control | Independent enable and duty cycle |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
| Tape & Reel Quantity | 2500 |
NCV7685DQR2G 引脚配置
| 引脚 1 | LED1 — Channel 1 current sink |
| 引脚 2 | LED2 — Channel 2 current sink |
| 引脚 3 | LED3 — Channel 3 current sink |
| 引脚 4 | LED4 — Channel 4 current sink |
| 引脚 5 | LED5 — Channel 5 current sink |
| 引脚 6 | LED6 — Channel 6 current sink |
| 引脚 7 | LED7 — Channel 7 current sink |
| 引脚 8 | LED8 — Channel 8 current sink |
| 引脚 9 | LED9 — Channel 9 current sink |
| 引脚 10 | LED10 — Channel 10 current sink |
| 引脚 11 | LED11 — Channel 11 current sink |
| 引脚 12 | LED12 — Channel 12 current sink |
| 引脚 13 | IREF — Reference current setting resistor |
| 引脚 14 | GND — Ground |
| 引脚 15 | SDA — I2C data |
| 引脚 16 | SCL — I2C clock |
| 引脚 17 | EN — Enable input |
| 引脚 18 | ADDR — I2C address select |
| 引脚 19 | VSUP — Battery supply input |
| 引脚 20 | VCC — Internal regulator output |
| 引脚 21 | NC — Not connected (per datasheet) |
| 引脚 22 | NC — Not connected (per datasheet) |
| 引脚 23 | NC — Not connected (per datasheet) |
| 引脚 24 | EP — Exposed thermal pad (connect to GND) |
典型应用
NCV7685DQR2G 适用于 6 应用s: Automotive Rear Lamps (Tail/Brake/Turn), Daytime Running Lights (DRL), Automotive Interior Ambient Lighting, Instrument Cluster Backlighting, Body Control Module (BCM) Lighting Outputs, Status Indicator and Signal Towers.
Automotive Rear Lamps (Tail/Brake/Turn)
The NCV7685DQR2G drives up to 12 LEDs at 60 mA each, ideal for combined tail/brake/turn rear lamps. Its 128-step PWM dimming per channel enables smooth turn-signal animation and variable-intensity brake-light priority. The AEC-Q100 qualification and 24-SSOP-EP exposed pad simplify thermal management in lamp-housing ambient temperatures up to +85C. Unlike a switching LED driver, it adds no EMI, helping the lighting module pass CISPR 25 Class 5 without complex filtering.
推荐
Daytime Running Lights (DRL)
DRLs require reliable constant-current drive across multiple high-brightness LEDs at lower power levels. The NCV7685DQR2G provides 60 mA per channel with 128 PWM steps for daylight intensity reduction versus night intensity. Linear topology eliminates the switching noise that can couple into AM/FM antennas. Designers route groups of 6-12 LEDs in parallel strings, with each channel independently controllable via I2C for adaptive DRL brightness.
推荐
Automotive Interior Ambient Lighting
Interior ambient strips use dozens of RGB or single-color LEDs driven from a body-control module. The NCV7685DQR2G's 12 channels, each with 128 PWM steps, support per-zone brightness control and color-mixing via grouped channels. I2C control minimizes MCU GPIO usage, and the SSOP-EP package fits slim PCB profiles beneath door trims. Designers typically run 30-50 mA per LED to balance brightness and thermal dissipation on the exposed pad.
推荐
Instrument Cluster Backlighting
Backlit gauges, HVAC readouts, and telltale indicators in instrument clusters benefit from precise constant-current drive and individual PWM control. The NCV7685DQR2G channels can be grouped to backlight specific zones, with brightness dynamically adjusted via I2C based on ambient light sensor input. AEC-Q100 qualification and automotive temperature range (-40C to +125C) ensure reliability behind the dashboard where ambient swings are extreme.
推荐
Body Control Module (BCM) Lighting Outputs
BCM-driven exterior lamps (position lamps, license-plate lights, side markers) consolidate many LED channels into one module. The NCV7685DQR2G handles 12 channels per IC, and BCMs often use 2-4 ICs to drive 50+ LEDs in parallel. Integrated open/short/overtemperature fault reporting via I2C flags defective channels for driver display. Linear topology keeps conducted emissions under automotive EMC limits without extra shielding.
推荐
Status Indicator and Signal Towers
Industrial status towers and signal stacks often need individually controllable LED segments at moderate current (20-60 mA per segment). The NCV7685DQR2G's 128 PWM steps enable variable intensity for warnings versus steady-state conditions, while I2C control allows PLC or HMI integration. Although AEC-Q100 is overkill for industrial, the part is fully specified over -40C to +125C, providing margin in factory-floor environments.
推荐
推荐产品汇总
工程参考数据： NCV7685DQR2G ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | NCV7685DQG | NCV7685PWR2G | NCV7684DQR2G |
|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | onsemi |
| Package | 24-SSOP-EP | 24-SSOP-EP - same | 24-SSOP-EP - same | 24-SSOP-EP - same |
| Number of Channels | 12 | 12 | 12 | 8 |
| Output Current per Channel | 60 mA | 60 mA | 60 mA | 60 mA |
| PWM Dimming Steps | 128 per channel | 128 per channel | 128 per channel | 128 per channel |
| Communication Interface | I2C | I2C | I2C | I2C |
| Automotive Qualification | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
| Tape & Reel Qty | 2500 | Tube (no reel) | 2500 | 2500 |
关键差异点
- Higher channel count in same SSOP-EP footprint than NCV7684 （对比 NCV7684DQR2G)
- Lower EMI than switching LED drivers （对比 TLC59401 (TI, TSSOP-28))
- Integrated fault diagnostics per channel （对比 Discrete MOSFET LED arrays)
设计说明
Estimated: at VIN=13.5 V (running engine), VLED=8 V (two red LEDs), and 60 mA per channel with all 12 channels active, total device dissipation is approximately (13.5-8)*0.06*12 = 3.96 W. The SSOP-EP thermal resistance is approximately 35-40 C/W on a 4-layer JEDEC test board, leading to a 140-160 C junction rise above ambient. Designers must verify theta_JA on the actual PCB and may need a copper heatslug under the EP pad to keep Tj below +150 C at 85 C ambient. Disable unused channels via I2C to reduce dissipation.
Place the IREF resistor (typically 30-100 kohm) close to pin 13 to minimize noise pickup. Route the I2C SDA/SCL traces away from the LED current-sink pins to reduce ground-noise coupling. The exposed pad must be soldered to a continuous ground plane with thermal vias (typically 4-9 vias in a 0.3 mm pitch array) to achieve the datasheet thermal resistance. Decouple VSUP with at least 1uF X7R close to pin 19.
Do not exceed the absolute maximum LED pin voltage (typically 7 V per channel); higher inverting voltage can damage the output FETs. Ensure the I2C pull-up resistors (typically 4.7 kohm to VCC) match the I2C bus speed (100 kHz Standard or 400 kHz Fast). Pulling EN low disables all channels but does NOT clear fault flags — re-read fault registers after a fault event. Verify address selection on the ADDR pin to avoid bus collisions when multiple NCV7685 devices share one MCU I2C bus.
合规信息
AEC-Q100 qualified per onsemi NCV prefix. RoHS and lead-free confirmed. Halogen-free status not stated in retrieved distributor data.
