Overview
The TPS54200DDCR, produced by Texas Instruments, is a 1.5-A synchronous buck LED driver designed to operate with a wide input voltage range of 4.5 V to 28 V. This device is optimized for high-current LED driver applications, including IR LED drivers for night vision and general-purpose LED lighting. The TPS54200 features integrated 150-mΩ and 70-mΩ MOSFETs, which enable high-efficiency operation and minimize the external component count. The device operates in current-mode with a fixed 600-kHz switching frequency, providing a good balance between efficiency and size.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Units |
|---|---|---|---|---|
| Input Voltage Range (VIN) | 4.5 | - | 28 | V |
| Output Current | - | 1.5 | - | A |
| Output Voltage Range (VOUT) | - | - | 23 | V |
| Switching Frequency | - | 600 | - | kHz |
| High-Side MOSFET Resistance | - | 150 | - | mΩ |
| Low-Side MOSFET Resistance | - | 70 | - | mΩ |
| Shutdown Current | - | 2 | - | μA |
| Analog Dimming Range | 1 | - | 100 | % |
| PWM Dimming Range | 2 | - | 100 | % |
| Package Type | - | - | - | SOT-23-THIN (6) |
Key Features
- Wide input voltage range of 4.5 V to 28 V
- Integrated 150-mΩ high-side and 70-mΩ low-side MOSFETs for high-efficiency operation
- Fixed 600-kHz switching frequency
- Peak current mode with internal compensation
- Precision analog dimming (ADIM) by PWM input
- PWM dimming mode with internal reference voltage halved to 100 mV for higher efficiency
- LED-open and -short protection, sense-resistor-open and -short protection
- Thermal shutdown and cycle-by-cycle current limit protection
- Shutdown-and-latch mode protection (TPS54200) or auto-retry mode protection (TPS54201)
- Compact SOT-23-THIN package for high power density and small footprint
Applications
- IR LED drivers for day or night vision in IP network cameras, analog security cameras, video doorbells, and embedded camera systems
- LED display and lighting in refrigerators, freezers, electronic smart locks, and general-purpose LED lighting
- Architecture lighting and other high-current LED applications
Q & A
- What is the input voltage range of the TPS54200?
The input voltage range of the TPS54200 is 4.5 V to 28 V.
- What is the maximum output current of the TPS54200?
The maximum output current of the TPS54200 is 1.5 A.
- What is the switching frequency of the TPS54200?
The switching frequency of the TPS54200 is fixed at 600 kHz.
- Does the TPS54200 support analog dimming?
Yes, the TPS54200 supports precision analog dimming (ADIM) by PWM input.
- What types of protection does the TPS54200 offer?
The TPS54200 offers LED-open and -short protection, sense-resistor-open and -short protection, thermal shutdown, and cycle-by-cycle current limit protection. It also features shutdown-and-latch mode protection or auto-retry mode protection depending on the model.
- What is the package type of the TPS54200?
The TPS54200 is available in a SOT-23-THIN (6) package.
- Can the TPS54200 be used for IR LED applications?
Yes, the TPS54200 can be used to drive IR LED arrays for night vision applications.
- How does the TPS54200 handle overload conditions?
The TPS54200 handles overload conditions through cycle-by-cycle current limit in the high-side MOSFET and low-side MOSFET freewheeling current limit.
- What is the shutdown current of the TPS54200?
The shutdown current of the TPS54200 is 2 μA.
- Does the TPS54200 support PWM dimming?
Yes, the TPS54200 supports PWM dimming mode with the internal reference voltage halved to 100 mV for higher efficiency.
