Overview
The UC2638DW, produced by Texas Instruments, is an advanced pulse width modulator (PWM) motor controller. This integrated circuit is designed for various PWM motor drive and amplifier applications, supporting both uni-directional and bi-directional drive circuits. The UC2638DW is similar in architecture to the UC2637 but offers significant improvements in circuit speed and the inclusion of a differential current sense amplifier, making it suitable for higher performance applications while maintaining flexibility.
The device features a programmable high-speed triangle oscillator, a 5X differential current sensing amplifier, a high slew rate error amplifier, and high-speed PWM comparators. It also includes dual 500mA totem pole output drivers and dual 60V, 50mA open collector drivers. Additional features such as undervoltage lockout, pulse-by-pulse peak current limiting, and a remote shutdown port enhance its functionality.
Key Specifications
| Parameter | Description |
|---|---|
| Package Type | SOIC (DW) |
| Number of Pins | 20 |
| Operating Temperature | -40°C to 85°C |
| Supply Voltage | Single or Dual Supply Operation |
| Oscillator Frequency | Up to 500 kHz |
| Output Drivers | Dual 500mA Totem Pole, Dual 60V, 50mA Open Collector |
| Current Sense Amplifier | 5X Differential Current Sense Amplifier |
| Current Limiting | Pulse-by-Pulse Peak Current Limiting |
| Environmental Compliance | RoHS and Green (no Sb/Br) |
| Moisture Sensitivity Level | Level-2-260C-1 YEAR |
Key Features
- Programmable high-speed triangle oscillator
- 5X differential current sensing amplifier
- High slew rate error amplifier
- High-speed PWM comparators
- Dual 500mA totem pole output drivers and dual 60V, 50mA open collector drivers
- Undervoltage lockout and pulse-by-pulse peak current limiting
- Remote shutdown port
- Precision externally available 5V reference
- Programmable oscillator amplitude and PWM deadband
- Single or dual supply operation via programmable AREFIN pin
Applications
The UC2638DW is designed for a variety of PWM motor drive and amplifier applications, including:
- PWM motor drives requiring uni-directional or bi-directional drive circuits
- High-performance motor control systems
- Full bridge configurations
- Applications requiring accurate current sensing and feedback
Q & A
- What is the UC2638DW used for?
The UC2638DW is used for PWM motor drive and amplifier applications, supporting both uni-directional and bi-directional drive circuits.
- What are the key features of the UC2638DW?
Key features include a programmable high-speed triangle oscillator, a 5X differential current sensing amplifier, high slew rate error amplifier, high-speed PWM comparators, and dual output drivers.
- What are the operating temperature ranges for the UC2638DW?
The operating temperature range is -40°C to 85°C.
- What types of output drivers does the UC2638DW have?
The UC2638DW has dual 500mA totem pole output drivers and dual 60V, 50mA open collector drivers.
- Is the UC2638DW RoHS compliant?
- What is the maximum switching frequency of the UC2638DW?
The maximum switching frequency is up to 500 kHz.
- Does the UC2638DW support single or dual supply operation?
- What is the purpose of the differential current sense amplifier in the UC2638DW?
The differential current sense amplifier is used for accurate current sensing and can be configured for average current feedback.
- Does the UC2638DW have any current limiting features?
- What is the status of the UC2638DW in terms of new designs?
The UC2638DW is not recommended for new designs (NRND) but is still in production to support existing customers.
- What are the available package types for the UC2638DW?
The available package types include SOIC (DW) and PDIP (N).
