Key facts
- Brand
- UNITRODE
- Model
- UC3175B
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-08
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Unitrode UC3175B Full-Bridge Power Amplifier Datasheet
The Unitrode UC3175B is a full-bridge power amplifier rated for a continuous output current of 0.8 Amperes. It is specifically intended for demanding servo applications, such as head positioning for high-density disk drives. The device features a precision current sense amplifier for accurate load current control using a single series resistor and operates with supply levels as low as 4V.
Key auxiliary functions include a dual-input under-voltage comparator that can force a built-in constant voltage source for head parking when either supply voltage drops below a minimum. Additional features include a POWER OK flag output, a LIMIT input to force maximum drive output, and an INHIBIT input to disable all amplifiers and reduce quiescent supply current. The device is available in PLCC and SOIC surface mount packages.
UNITRODE UC3175B specifications
| Operating Supply Voltage Range | 4V to 15V |
|---|---|
| Output Saturation Voltage (Total, 800mA) | 1.25V |
| Unity Gain Bandwidth (Amplifier A) | 2 MHz |
| Thermal Shutdown Temperature | 165 °C |
Source: Unitrode UC3175B Full-Bridge Power Amplifier Datasheet
All UNITRODE UC3175B documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
How does the device handle low supply voltage?
It can operate down to 4V supply levels and includes a controlled velocity head parking function that activates when supply voltage falls below 3.0 Volts.
From: Unitrode UC3175B Full-Bridge Power Amplifier Datasheet
What happens when the INHIBIT input is activated?
The INHIBIT input overrides the amplifier inputs to convert the power outputs to a programmable constant voltage source and reduces quiescent supply current.
From: Unitrode UC3175B Full-Bridge Power Amplifier Datasheet
What is the maximum continuous output current?
The device is rated for a continuous output current of 0.8 Amperes.
From: Unitrode UC3175B Full-Bridge Power Amplifier Datasheet
What is the minimum operating supply voltage?
The power amplifier will operate down to 4V supply levels.
From: Unitrode UC3175B Full-Bridge Power Amplifier Datasheet