Overview
The NCV887701D1R2G is an Automotive Grade Start-Stop Non-Synchronous Boost Controller produced by onsemi. This device is designed to supply a minimum output voltage during Start-Stop vehicle operation when the battery voltage sags. It drives an external N-channel MOSFET and utilizes peak current mode control with internal slope compensation. The controller includes an internal regulator to supply charge to the gate driver and features low quiescent current sleep mode operation, making it highly efficient in automotive applications.
Key Specifications
| Characteristic | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Dc Supply Voltage (VOUT) | VOUT | -0.3 | 40 | V | ||
| Peak Transient Voltage (Load Dump on VOUT) | 45 | V | ||||
| Operating Junction Temperature | TJ | -40 | 150 | °C | ||
| Storage Temperature Range | -65 | 150 | °C | |||
| Quiescent Current, Sleep Mode | Iq,sleep | VOUT = 13.2 V, TJ = 25°C, DISB = 0 V | 12 | 14 | μA | |
| Switching Frequency | FSW | ROSC = Open | 153 | 170 | 187 | kHz |
| Current Limit Threshold Voltage | Vcl | 180 | 200 | 220 | mV |
Key Features
- Automatic Enable Below Wake Up Threshold Voltage: Factory-programmable wake-up threshold voltage to enable the device when the supply voltage drops below a set point.
- Override Disable Function: The device can be disabled by bringing the DISB pin low.
- Boost Mode Operation at Regulation Set Point: Boost operation initiates when the supply voltage drops below the regulation set point.
- Peak Current Mode Control with Internal Slope Compensation: Uses peak current mode control with internal slope compensation for stable operation.
- Externally Adjustable Frequency Operation: The switching frequency can be adjusted using an external resistor connected to the ROSC pin.
- Wide Input Voltage Range: Operates over a wide input voltage range of 2 V to 40 V, with a load dump capability of up to 45 V.
- Low Quiescent Current Sleep Mode: Low quiescent current during sleep mode to minimize power consumption.
- Protection Features: Includes cycle-by-cycle current limiting, thermal shutdown, and overcurrent protection.
Applications
The NCV887701D1R2G is primarily designed for automotive Start-Stop systems where maintaining a stable output voltage during battery voltage sags is crucial. It is also suitable for other applications requiring a robust and efficient boost converter, such as:
- Automotive electronics
- Industrial power systems
- Renewable energy systems
- Power backup systems
Q & A
- What is the primary function of the NCV887701D1R2G?
The primary function of the NCV887701D1R2G is to supply a minimum output voltage during Start-Stop vehicle operation when the battery voltage sags.
- How does the device enable and disable?
The device is enabled when the supply voltage drops below the wake-up threshold voltage and can be disabled by bringing the DISB pin low.
- What is the input voltage range of the NCV887701D1R2G?
The device operates over a wide input voltage range of 2 V to 40 V, with a load dump capability of up to 45 V.
- What type of control scheme does the NCV887701D1R2G use?
The device uses peak current mode control with internal slope compensation.
- How can the switching frequency be adjusted?
The switching frequency can be adjusted using an external resistor connected to the ROSC pin.
- What are the key protection features of the NCV887701D1R2G?
The device includes cycle-by-cycle current limiting, thermal shutdown, and overcurrent protection.
- What is the quiescent current in sleep mode?
The quiescent current in sleep mode is typically 12 μA.
- What is the operating junction temperature range?
The operating junction temperature range is -40°C to 150°C.
- Is the NCV887701D1R2G suitable for automotive applications?
Yes, the device is AEC-Q100 qualified and PPAP capable, making it suitable for automotive and other demanding applications.
- How does the device handle overcurrent conditions?
The device features peak current mode and overcurrent latch-off protections to handle overcurrent conditions.
