Overview
The SPV1040TTR, produced by STMicroelectronics, is a low power, low voltage, monolithic step-up converter designed to maximize energy generated from solar cells or fuel cells. It operates within an input voltage range of 0.3 V to 5.5 V, making it highly suitable for applications where low input voltage handling is crucial. The device incorporates an embedded Maximum Power Point Tracking (MPPT) algorithm, which ensures maximum efficiency under varying environmental conditions such as irradiation, dirt, and temperature. The SPV1040TTR employs a voltage regulation loop to fix the charging battery voltage via an external resistor divider and includes features like overcurrent and overtemperature protection, as well as input source reverse polarity protection.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 0.3 V to 5.5 V | V |
| Internal Synchronous Rectifier Resistance | 140 mΩ | mΩ |
| Internal Power Active Switch Resistance | 120 mΩ | mΩ |
| PWM Frequency | 100 kHz (typical) | kHz |
| Maximum Output Current | Up to 1.8 A (peak) | A |
| Maximum Temperature Limit | 155 °C | °C |
| Efficiency | Up to 95% | % |
| Package | TSSOP8 (3x4.4 mm) | - |
| Operating Temperature Range | -40 °C to 125 °C | °C |
Key Features
- Embedded MPPT algorithm for maximum power harvesting
- Output voltage regulation
- Overcurrent and overtemperature protection
- Input source reverse polarity protection
- Built-in soft-start
- Duty cycle controlled by MPPT algorithm
- High efficiency up to 95%
Applications
- Smart phones and GPS systems
- Wireless headsets
- Small appliances and sensors
- Portable media players
- Digital still cameras
- Toys and portable healthcare devices
Q & A
- What is the input voltage range of the SPV1040TTR?
The input voltage range of the SPV1040TTR is from 0.3 V to 5.5 V.
- What is the purpose of the embedded MPPT algorithm in the SPV1040TTR?
The embedded MPPT algorithm maximizes the energy generated from solar cells or fuel cells by adjusting the duty cycle based on environmental conditions.
- How does the SPV1040TTR protect against overcurrent and overtemperature?
The device stops PWM switching if the maximum current threshold (up to 1.8 A peak) is reached or the maximum temperature limit (up to 155 °C) is exceeded.
- What is the maximum output current of the SPV1040TTR?
The maximum output current of the SPV1040TTR is up to 1.8 A peak.
- What is the efficiency of the SPV1040TTR?
The efficiency of the SPV1040TTR can be up to 95%.
- What package type is the SPV1040TTR available in?
The SPV1040TTR is available in a TSSOP8 package (3x4.4 mm).
- What are some common applications of the SPV1040TTR?
Common applications include smart phones, GPS systems, wireless headsets, small appliances, sensors, portable media players, digital still cameras, and portable healthcare devices.
- How does the SPV1040TTR handle reverse polarity at the input?
The device includes input source reverse polarity protection to prevent damage in case of reverse connection of the solar panel on the input.
- What is the operating temperature range of the SPV1040TTR?
The operating temperature range of the SPV1040TTR is from -40 °C to 125 °C.
- How does the soft-start feature work in the SPV1040TTR?
The soft-start feature ensures power-up even when the output voltage is very low, by allowing current to flow from the input to the output through the intrinsic body diode of the synchronous rectifier until the output voltage reaches 0.8 V.
- What is the purpose of the voltage regulation loop in the SPV1040TTR?
The voltage regulation loop fixes the charging battery voltage via an external resistor divider.
