Overview
The IPS4260L, produced by STMicroelectronics, is a monolithic high-speed quad low-side intelligent power switch. This device is designed to drive four independent capacitive, resistive, or inductive loads with one side connected to the supply voltage. It features high switching frequencies up to 250 kHz and integrates several protection mechanisms to ensure robust operation.
The IPS4260L includes built-in catch diodes to clamp turn-off transients generated by inductive loads, and it supports fast decay of these transients with proper external TVS configuration. Each channel is protected against overload and short-circuit events, with adjustable current limitation and cut-off delay times set by external resistors.
Key Specifications
| Parameter | Test Conditions | Min. | Max. | Unit | |
|---|---|---|---|---|---|
| RDS(ON) | RLOAD = 48 Ω, VCC = 24 V @ TJ = 25 °C | - | 260 | 560 | mΩ |
| VOUT(OFF) | VIN = 0 V and IOUT = 0 A | - | - | VCC-2 | V |
| IOUT(OFF) | VIN = 0 V, VOUT = VCC = 24 V | - | 0.5 | 10 | μA |
| VFCD | I forward = 500 μA | 0.21 | 0.50 | 0.73 | V |
| IRRM | Vrrm= 55 V | - | - | 1 | μA |
| tr | see Figure 3 | 450 | 700 | - | ns |
| tf | see Figure 3 | 500 | 600 | - | ns |
| tPD(H-L) | see Figure 4 | 500 | 700 | - | ns |
| tPD(L-H) | see Figure 4 | 400 | 600 | - | ns |
| TJSD | - | - | - | 160 | °C |
| TJHYST | - | - | - | 20 | °C |
Key Features
- High-Speed Switching: Up to 250 kHz switching frequency.
- Integrated Protections: Overload, short-circuit, and overtemperature protections.
- Adjustable Current Limitation: Current limitation threshold set by an external resistor (RILIM).
- Programmable Cut-Off Delay: Cut-off delay time set by an external resistor (RCoD).
- Diagnostic Capabilities: Open load detection, thermal shutdown, and cut-off protection diagnostics via OL and FLT pins.
- Fast Decay Capability: Fast decay of inductive load transients with external TVS configuration.
- Parallel Operation: Channels can be paralleled to reduce power dissipation.
Applications
- Industrial Automation: Control of motors, valves, and other industrial loads.
- Automotive Systems: Power management in automotive applications requiring robust and reliable switching.
- Medical Devices: Safe and reliable power switching in medical equipment.
- Consumer Electronics: Power management in consumer electronics requiring high reliability and protection features.
Q & A
- What is the maximum switching frequency of the IPS4260L?
The IPS4260L can switch at frequencies up to 250 kHz.
- How is the current limitation threshold set in the IPS4260L?
The current limitation threshold is set by an external resistor (RILIM) connected between the ILIM pin and the SGND ground plane.
- What is the purpose of the FLT pin in the IPS4260L?
The FLT pin is used for diagnostic purposes, indicating thermal shutdown or cut-off protection events.
- Can the channels of the IPS4260L be paralleled?
- How does the IPS4260L protect against overtemperature?
The device features thermal shutdown, turning off the power stage if the junction temperature exceeds the shutdown threshold (TJSD).
- What is the open load detection feature in the IPS4260L?
The open load detection feature detects if the load is disconnected from the OUTx pin when in OFF-state and reports this condition via the OL pin.
- How is the cut-off delay time programmed in the IPS4260L?
The cut-off delay time is programmed by an external resistor (RCoD) connected between the CoD pin and the SGND ground plane.
- What happens if the CoD pin is shorted to SGND in the IPS4260L?
If the CoD pin is shorted to SGND, the cut-off feature is disabled, and the power stage remains ON in current limitation condition until the input is forced LOW or thermal protection is triggered.
- What is the typical on-state resistance of the IPS4260L?
The typical on-state resistance (RDS(ON)) is 260 mΩ at TJ = 25 °C and VCC = 24 V.
- How does the IPS4260L handle inductive load transients?
The device includes integrated catch diodes to clamp turn-off transients generated by inductive loads, and it supports fast decay with proper external TVS configuration.
