Overview
The NCV7685DQR2G, produced by onsemi, is a 12-channel linear programmable constant current driver designed specifically for automotive LED applications. This device features twelve independent constant current sources with a common reference, allowing for precise control over LED brightness. It supports 128 different duty cycle levels adjustable via pulse width modulation (PWM) and can be controlled through an I2C serial interface or in stand-alone mode. The NCV7685DQR2G is versatile, supporting various automotive lighting applications such as dashboard lights, rear combination lamps, daytime running lights, and more.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Analog Supply Voltage (VS) - parametric operation | VS_OP | 5 | 18 | V | |
| Analog Supply Voltage - functional extended operation | VS_EXT | 5 | 28 | V | |
| Digital Supply Voltage (VDD) | VDD | 3.15 | 5.5 | V | |
| Ambient Temperature | TA | -40 | 125 | °C | |
| Output Current per Channel | IOUT | 60 | mA | ||
| PWM Frequency | PWM1/PWM2/PWM3 | 132/264/528 | 150/300/600 | 168/336/672 | Hz |
| ESD Capability (HBM) | ESDHBM | ±2000 | V |
Key Features
- Twelve linear programmable constant current sources with common reference.
- 128 different duty cycle levels adjustable via PWM.
- I2C serial interface for programmable control or stand-alone mode operation.
- Internal circuitry for detecting open-load conditions and thermal shutdown.
- 3.3 V voltage reference output capable of delivering up to 1 mA.
- Support for multiple PWM frequency configurations up to 1200 Hz.
- Diagnostic features including open-drain diagnostic input/output and programmable fault detection.
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 primary function of the NCV7685DQR2G?
The NCV7685DQR2G is a 12-channel linear programmable constant current driver designed for regulating and controlling LEDs in automotive applications. - How many duty cycle levels can be adjusted on the NCV7685DQR2G?
The device supports 128 different duty cycle levels adjustable via PWM. - What interface is used for programmable control of the NCV7685DQR2G?
The device uses an I2C serial interface for programmable control. - What is the maximum output current per channel of the NCV7685DQR2G?
The maximum output current per channel is 60 mA. - What are the supported PWM frequency configurations?
The device supports multiple PWM frequency configurations up to 1200 Hz. - How does the NCV7685DQR2G detect open-load conditions?
The device has internal circuitry to detect open-load conditions for each independent channel. - What is the purpose of the 3.3 V voltage reference output?
The 3.3 V voltage reference output is capable of delivering up to 1 mA and is primarily intended to supply 3.3 V loads. - Can the NCV7685DQR2G operate in stand-alone mode?
Yes, the device can operate in stand-alone mode without the need for an I2C interface. - What are some common applications of the NCV7685DQR2G?
Common applications include dashboard lights, rear combination lamps, daytime running lights, fog lights, and center high mounted stop lamps. - What is the ambient temperature range for the NCV7685DQR2G?
The ambient temperature range is -40°C to 125°C.
