Overview
The TPS259521DSGR, part of the TPS2595xx family, is a highly integrated eFuse (electronic fuse) designed by Texas Instruments. This device provides comprehensive circuit protection and power management in a compact 8-pin WSON package. It is tailored for applications requiring robust defense against overloads, short circuits, voltage surges, and excessive inrush current. The TPS259521DSGR operates over a wide input voltage range of 2.7 V to 18 V, with an absolute maximum of 20 V, making it versatile for various power supply scenarios.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.7 V to 18 V | V |
| Absolute Maximum Input Voltage | 20 V | V |
| On-Resistance (RON) | 34 mΩ (Typical) | mΩ |
| Overvoltage Protection Clamp | 3.8 V, 5.7 V, 13.7 V options | V |
| Overvoltage Protection Response Time | 5 µs (Typical) | µs |
| Current Limit Range | 0.5 A to 4 A | A |
| Current Limit Accuracy | ±7.5% | % |
| Enable Input Type | Active High (TPS259521DSGR) | |
| Undervoltage Lockout (UVLO) Threshold | 2.44 V to 2.64 V (Rising), 2.33 V to 2.53 V (Falling) | V |
| Output Slew Rate Control | Adjustable via dVdt pin | |
| Over Temperature Protection (OTP) | 157 °C (Typical) | °C |
| Fault Indication Pin (FLT) | Open drain output | |
| Certifications | UL 2367, IEC 62368-1 |
Key Features
- Wide Input Voltage Range: Operates from 2.7 V to 18 V with an absolute maximum of 20 V.
- Low On-Resistance: Typical RON of 34 mΩ, minimizing power loss.
- Fast Overvoltage Protection: Clamps overvoltage events quickly with a response time of 5 µs.
- Adjustable Current Limit: Output current limit can be set with a single external resistor, with a range of 0.5 A to 4 A and ±7.5% accuracy.
- Load Current Monitoring: The ILM pin allows for monitoring the output load current.
- Adjustable Output Slew Rate Control: Output turn-on slew rate can be adjusted using the dVdt pin.
- Over Temperature Protection (OTP): Thermal shutdown at 157 °C with a hysteresis of 5 °C.
- Fault Indication Pin (FLT): Indicates fault events via an open drain output.
- Quick Output Discharge (QOD): Available in some variants for quick discharge of the output capacitor.
- Certifications: Compliant with UL 2367 and IEC 62368-1 standards.
Applications
- Hot-Swap and Hot-Plug Systems: Ideal for applications requiring safe insertion and removal of power sources.
- Adapter Powered Systems: Suitable for systems powered by external adapters.
- Multi-function Printers and Peripherals: Protects against power surges and overloads in printing and other peripheral devices.
- SSDs and HDDs: Ensures reliable power delivery to storage devices.
- Industrial Systems: Used in various industrial applications requiring robust power management.
- White Goods and Consumer Electronics: Protects household appliances and consumer electronics from power-related issues.
- Set-Top Boxes and Digital TVs: Ensures stable power supply in multimedia devices.
Q & A
- What is the input voltage range of the TPS259521DSGR?
The input voltage range is from 2.7 V to 18 V, with an absolute maximum of 20 V.
- What is the typical on-resistance (RON) of the TPS259521DSGR?
The typical on-resistance is 34 mΩ.
- How does the overvoltage protection work?
The device clamps overvoltage events quickly with a response time of 5 µs, available in 3.8 V, 5.7 V, and 13.7 V options.
- Can the current limit be adjusted?
Yes, the output current limit can be set with a single external resistor, ranging from 0.5 A to 4 A with ±7.5% accuracy.
- How is the load current monitored?
The load current can be monitored using the ILM pin, which also sets the output current limit.
- What is the purpose of the dVdt pin?
The dVdt pin allows for adjusting the output turn-on slew rate.
- What is the thermal shutdown temperature?
The device shuts down at 157 °C with a hysteresis of 5 °C.
- How does the fault indication work?
Fault events are indicated via an open drain output on the FLT pin.
- Is the TPS259521DSGR certified by any standards?
Yes, it is compliant with UL 2367 and IEC 62368-1 standards.
- What are some common applications for the TPS259521DSGR?
Common applications include hot-swap systems, adapter powered systems, multi-function printers, SSDs and HDDs, industrial systems, white goods, set-top boxes, and digital TVs.
