Overview
The NCV7684DQR2G, produced by onsemi, is a 12-channel LED linear current driver designed primarily for automotive applications. This device features 12 linear programmable constant current sources, each capable of driving up to 60 mA. The current levels are adjustable via pulse width modulation (PWM) and can be programmed using an I2C serial interface. The NCV7684 is suitable for various automotive lighting applications, including dashboard lights, rear combination lamps, daytime running lights, fog lights, and turn signals.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Power Supply Voltage (VS) | 5 | - | 28 | V |
| Transient Voltage (VS, t < 500 ms) | - | - | 40 | V |
| Output Current per Channel (IOUTHOT) | 50 | 55 | 60 | mA |
| Current Matching from Channel to Channel (IMATCH) | -7 | 0 | 7 | % |
| Voltage Reference Output (V_VCC) | 3.20 | 3.30 | 3.45 | V |
| Thermal Shutdown Threshold (TJ) | 160 | - | 180 | °C |
| Thermal Shutdown Hysteresis (TJSD_HYS) | 10 | - | 15 | °C |
| Digital Supply Voltage (VDD) | 3.15 | - | 5.5 | V |
| Digital Supply Current (IDD) | 1.5 | - | 2.0 | mA |
Key Features
- 12 linear programmable constant current sources, each capable of driving up to 60 mA.
- Adjustable current levels via pulse width modulation (PWM) programmable via I2C serial interface.
- 3.3 V voltage reference output for loads up to 1 mA.
- Internal circuitry to detect open-load conditions.
- I2C bus interface with CRC8 error detection algorithm.
- Thermal warning and thermal shutdown protection.
- Parallel output combinations allowed to increase system-level LED string current.
- Diagnostic output pin (DIAG) to alert microcontroller of error conditions.
Applications
- Dashboard applications.
- Rear combination lamps (RCL).
- Daytime running lights (DRL).
- Fog lights.
- Center high mounted stop lamps (CHMSL) arrays.
- Turn signal and other externally modulated applications.
Q & A
- What is the NCV7684DQR2G used for? The NCV7684DQR2G is a 12-channel LED linear current driver designed for automotive lighting applications.
- How many channels does the NCV7684DQR2G have? The device has 12 linear programmable constant current sources.
- What is the maximum current per channel? Each channel can drive up to 60 mA.
- How is the current adjusted? The current levels are adjustable via pulse width modulation (PWM) and can be programmed using an I2C serial interface.
- What is the voltage reference output of the NCV7684DQR2G? The device provides a 3.3 V voltage reference output for loads up to 1 mA.
- Does the NCV7684DQR2G have thermal protection? Yes, it features thermal warning and thermal shutdown protection.
- Can the outputs be combined in parallel? Yes, parallel combinations of any number of outputs are allowed to increase system-level LED string current.
- How does the device alert the microcontroller of error conditions? The device has a diagnostic output pin (DIAG) to alert the microcontroller of error conditions such as open-load or thermal shutdown.
- What is the operating temperature range of the NCV7684DQR2G? The device operates over a temperature range of -40°C to 150°C.
- Is the NCV7684DQR2G Pb-free? Yes, the NCV7684DQR2G is a Pb-free device.
