Overview
The UC2903DW is a quad supply and line monitor integrated circuit manufactured by Texas Instruments. This device is designed to monitor up to four separate supply voltage levels, making it highly versatile in various power management applications. It features a rugged and scalable design, enabling precise monitoring and control over multiple signal channels.
The UC2903DW includes a high-speed pulse width modulation (PWM) circuit, an error amplifier, voltage reference, and feedback loop components. These features ensure efficient power conversion with minimal switching losses and provide unparalleled control over output voltage and regulation.
Key Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Product Status | Obsolete | Programmable | Not Verified |
| Type | Multi-Voltage Supervisor | Number of Voltages Monitored | 4 |
| Voltage - Threshold | Adjustable/Selectable | Output | Open Drain or Open Collector |
| Reset | Active Low | Reset Timeout | Adjustable/Selectable |
| Operating Temperature | -40°C ~ 85°C (TA) | Mounting Type | Surface Mount |
| Supply Voltage (+VIN) | +8V to +40V | Open Collector Output Currents | 50mA |
| Sense 1-4 Input Voltages | -0.3V to +20V | Line/Switcher Sense Input Voltage | -0.3V to +40V |
| Op-Amp and Inverter Input Voltages | -0.3V to +40V | Op-Amp and Inverter Output Currents | -40mA |
Key Features
- Inputs for monitoring up to four separate supply voltage levels
- Internal inverter for sensing a negative supply voltage
- Line/switch sense input for early power source failure warning
- Programmable under- and over-voltage fault thresholds with proportional hysteresis
- Precision 2.5V reference
- General purpose op-amp for auxiliary use
- Three high current, >30mA, open-collector outputs indicate over-voltage, under-voltage, and power OK conditions
- Input supply under-voltage sensing and start-latch eliminate erroneous fault alerts during start-up
- Low-power voltage comparator with high-speed response and low input offset voltage
- Wide range of input common-mode voltage and large differential input voltage
- High open-loop gain, low quiescent current, and rail-to-rail output stage
Applications
The UC2903DW is commonly used in various power management and control applications, including:
- Voltage mode PWM controller applications such as in DC-DC converters
- Motor control systems
- Power supply systems
- Industrial and automotive applications requiring high efficiency and reliability
- Driving power MOSFETs and IGBTs
Q & A
- What is the UC2903DW used for?
The UC2903DW is used for monitoring up to four separate supply voltage levels and providing over-voltage and under-voltage protection in power management applications.
- Who manufactures the UC2903DW?
The UC2903DW is manufactured by Texas Instruments.
- What is the operating temperature range of the UC2903DW?
The operating temperature range of the UC2903DW is -40°C to 85°C.
- What type of output does the UC2903DW have?
The UC2903DW has open drain or open collector outputs.
- Can the UC2903DW sense negative supply voltages?
Yes, the UC2903DW includes an internal inverter for sensing negative supply voltages.
- What is the supply voltage range for the UC2903DW?
The supply voltage range for the UC2903DW is +8V to +40V.
- Does the UC2903DW have programmable fault thresholds?
Yes, the UC2903DW has programmable under- and over-voltage fault thresholds with proportional hysteresis.
- What type of package does the UC2903DW come in?
The UC2903DW comes in an 18-SOIC package with a surface-mount form factor.
- Is the UC2903DW suitable for industrial and automotive applications?
Yes, the UC2903DW is suitable for industrial and automotive applications due to its wide temperature range and high reliability.
- Can the UC2903DW drive power MOSFETs and IGBTs?
Yes, the UC2903DW is capable of driving power MOSFETs and IGBTs.
