Overview
The TPS92200D2DDCR is a 1.5-A synchronous buck LED driver produced by Texas Instruments. This device is designed to operate with a wide input voltage range of 4 V to 30 V and provides high power density with high efficiency in an ultra-small solution size. It integrates high-side and low-side NMOS switches, enabling peak-current-mode control with full internal compensation. This ensures high transient response performance over a wide range of operating conditions without the need for additional external components.
The TPS92200D2DDCR supports flexible dimming methods, including analog dimming by changing the internal reference voltage proportional to the duty cycle of the PWM signal input in a 1% to 100% range. The device also features ultra-low shutdown current, ultra-low output discharge current, and a high switching frequency of 1 MHz, allowing the use of small surface-mount inductors and chip capacitors.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 4 | - | 30 | V |
| Output Current | - | 1.5 | - | A |
| High-Side FET On Resistance | 150 | - | - | mΩ |
| Low-Side FET On Resistance | 90 | - | - | mΩ |
| Shutdown Current | - | 1 | - | μA |
| Output Discharge Current | - | 1 | - | μA |
| Switching Frequency | 0.8 | 1 | 1.2 | MHz |
| Maximum Duty Cycle | - | - | 99% | % |
| Thermal Shutdown Temperature | - | 165 | - | °C |
Key Features
- Wide input voltage range of 4 V to 30 V
- Integrated 150-mΩ and 90-mΩ MOSFETs for 1.5-A continuous output current
- Ultra-low shutdown current: 1 μA
- Ultra-low output discharge current: 1 μA
- 1-MHz switching frequency
- Maximum duty cycle up to 99%
- Peak current mode with internal compensation
- Flexible dimming options:
- Analog dimming with digital input (TPS92200D2)
- Dimming range: 1% to 100% based on PWM signal input
- Ultra-low and accurate FB voltage: 99 mV ±3 mV
- Full protection features:
- LED open-load protection
- LED+ short-to-GND protection with auto-retry
- LED+ and LED– short circuitry protection with auto-retry
- Sense-resistor open-load and short-to-GND protection with auto-retry
- Thermal shutdown protection with auto-retry
- SOT23 (6) and VQFN-HR (6) package options
Applications
- Video surveillance IR/White LED driver
- Facial recognition IR LED driver
- Stage lighting LED driver
- General industrial and commercial illumination
- Medical UV LED driver
- AA or Li-Ion battery charger
Q & A
- What is the input voltage range of the TPS92200D2DDCR?
The input voltage range is 4 V to 30 V.
- What is the maximum output current of the TPS92200D2DDCR?
The maximum output current is 1.5 A.
- What is the switching frequency of the TPS92200D2DDCR?
The switching frequency is internally set to 1 MHz.
- What are the dimming options available for the TPS92200D2DDCR?
The device supports analog dimming with a digital input, with a dimming range of 1% to 100% based on the PWM signal input.
- What protection features are included in the TPS92200D2DDCR?
The device includes LED open-load protection, LED+ short-to-GND protection, LED+ and LED– short circuitry protection, sense-resistor open-load and short-to-GND protection, and thermal shutdown protection, all with auto-retry.
- What are the package options for the TPS92200D2DDCR?
The device is available in SOT23 (6) and VQFN-HR (6) packages.
- What is the thermal shutdown temperature of the TPS92200D2DDCR?
The thermal shutdown temperature is typically 165°C.
- How does the TPS92200D2DDCR handle overvoltage protection?
The device shuts down immediately if the FB pin voltage exceeds 1 V, and it starts an auto-retry counter.
- What is the minimum on time for the TPS92200D2DDCR?
The minimum on time is 75 ns to 100 ns.
- Can the TPS92200D2DDCR be used in medical applications?
