Overview
The NCV7683DQR2G, produced by onsemi, is an enhanced 100 mA linear current regulator and controller designed specifically for automotive LED lighting applications. This device consists of eight linear programmable constant current sources, making it ideal for regulating and controlling LED-based Rear Combination Lamps, blinking functions, and other automotive lighting needs. The NCV7683 allows for two programmed levels of illumination: stop (100% duty cycle) and tail (programmable duty cycle), with the option to implement external PWM control. LED brightness levels can be easily programmed using two external resistors, and an optional external ballast FET can be used for power distribution in high-current designs. The device also features a set back power limit to reduce drive current during overvoltage conditions, which is particularly useful in low-power applications without an external FET.
Key Specifications
| Characteristic | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VP) | 4.5 | - | 16 | V |
| Output Current per Channel | - | - | 100 | mA |
| Total System Level String Current | - | - | 800 | mA |
| Stop Turn-on Delay Time | 14 | 45 | - | μsec |
| Stop Turn-off Delay Time | 14 | 45 | - | μsec |
| PWM Frequency | 400 | 800 | 1200 | Hz |
| Sequence Time | 45.5 | 49 | 52.5 | msec |
| Operating Temperature Range | -40 | - | 150 | °C |
| Package Type | - | - | SSOP-24 with Exposed Pad | - |
Key Features
- Eight linear programmable constant current sources
- Programmable stop and tail illumination levels
- Optional external PWM control
- External ballast FET for high-current designs
- Set back power limit during overvoltage conditions
- Sequencing functionality for up to 8 channels
- Global enable function and display sequencing
- Open LED string diagnostic with open-drain output
- Slew rate control and low dropout operation
- On-chip 800 Hz tail PWM dimming
- AEC-Q100 qualified and PPAP capable
- Improved EMC performance
- Programmable latch-off function on open string
- Overtemperature fault reporting
Applications
- Automotive Rear Combination Lamps
- Automotive Daytime Running Lights
- Automotive Fog Lights
- Automotive Center High Mounted Stop Lamps (CHMSL)
- Turn Signal and Other Externally Modulated Applications
- Signature Lamp
Q & A
- What is the primary function of the NCV7683DQR2G?
The NCV7683DQR2G is a linear current regulator and controller designed for regulating and controlling LED-based automotive lighting applications. - How many constant current sources does the NCV7683DQR2G have?
The device has eight linear programmable constant current sources. - What is the maximum output current per channel?
The maximum output current per channel is 100 mA. - Can the NCV7683DQR2G be used with external PWM control?
Yes, the device supports optional external PWM control. - What is the purpose of the external ballast FET?
The external ballast FET is used for power distribution in designs requiring high currents. - How is the sequencing functionality controlled?
The sequencing functionality is controlled and programmed by individual pins, allowing for various sequencing configurations. - What is the operating temperature range of the NCV7683DQR2G?
The operating temperature range is from -40°C to 150°C. - Is the NCV7683DQR2G AEC-Q100 qualified?
Yes, the device is AEC-Q100 qualified and PPAP capable. - How does the device handle open LED string detection?
The device features open LED string diagnostic with open-drain output and programmable latch-off function on open string. - What package type is the NCV7683DQR2G available in?
The device is available in a SSOP-24 package with an exposed pad.
