Overview
The LTC4412ES6#TRPBF, produced by Analog Devices Inc., is a Low Loss PowerPath™ Controller designed to control an external P-channel MOSFET. This device creates a near ideal diode function, which is ideal for power switchover or load sharing applications. It allows for highly efficient OR’ing of multiple power sources, extending battery life and reducing self-heating. The LTC4412 operates over a wide supply range, supporting voltages from 2.5V to 28V, making it suitable for various power management scenarios, including those involving wall adapters or multiple battery systems.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Operating Voltage Range | 2.5V to 28V | |
| Operating Temperature Range | –40°C to 85°C | |
| Package Type | 6-Lead Plastic TSOT-23 | |
| Quiescent Current | 11µA (typical) | |
| Turn-On Time (STAT) | 4.5µs to 25µs | 2.5V ≤ VIN ≤ 28V |
| Turn-Off Time (STAT) | 40µs to 75µs | 2.5V ≤ VIN ≤ 28V |
| CTL Input Low Voltage | 0.5V to 0.35V | 2.5V ≤ VIN ≤ 28V |
| CTL Input High Voltage | 0.9V to 0.635V | 2.5V ≤ VIN ≤ 28V |
| CTL Input Pull-Down Current | 1µA to 5.5µA | 0.35V ≤ VCTL ≤ 28V |
| CTL Hysteresis | 135mV | 2.5V ≤ VIN ≤ 28V |
Key Features
- Near Ideal Diode Function: The LTC4412 creates a near ideal diode function using an external P-channel MOSFET, allowing for efficient power switchover or load sharing.
- Low Quiescent Current: The device has a low quiescent current of 11µA (typical), independent of the load current.
- Wide Supply Range: Operates from 2.5V to 28V, supporting up to six Li-Ion cells in series.
- Internal Voltage Clamp: Includes an internal voltage clamp for MOSFET protection.
- Load Sharing and Power Switchover: Can be used to automatically disconnect the load from the battery when an auxiliary power source is connected, and supports load sharing between multiple batteries or charging of multiple batteries from a single charger.
Applications
- Power Management Systems: Ideal for systems requiring efficient power switchover or load sharing, such as battery-powered devices and systems with wall adapters.
- Battery Management: Suitable for managing multiple battery systems, including charging and discharging scenarios.
- Automotive Systems: Versions of the LTC4412 are available with controlled manufacturing to support automotive applications.
- Portable Electronics: Useful in portable electronics where efficient power management is crucial for extending battery life.
Q & A
- What is the primary function of the LTC4412?
The LTC4412 controls an external P-channel MOSFET to create a near ideal diode function for power switchover or load sharing.
- What is the operating voltage range of the LTC4412?
The operating voltage range is from 2.5V to 28V.
- What is the typical quiescent current of the LTC4412?
The typical quiescent current is 11µA.
- How does the LTC4412 handle load sharing between multiple power sources?
The LTC4412 can be used to automatically disconnect the load from the battery when an auxiliary power source is connected and supports load sharing between multiple batteries or charging of multiple batteries from a single charger.
- What is the purpose of the internal voltage clamp in the LTC4412?
The internal voltage clamp is for MOSFET protection.
- Can the LTC4412 be used in automotive applications?
Yes, versions of the LTC4412 are available with controlled manufacturing to support automotive applications.
- What is the package type of the LTC4412ES6#TRPBF?
The package type is 6-Lead Plastic TSOT-23.
- What is the operating temperature range of the LTC4412ES6#TRPBF?
The operating temperature range is from –40°C to 85°C.
- How does the LTC4412 manage the turn-on and turn-off times of the MOSFET?
The turn-on time is typically between 4.5µs to 25µs, and the turn-off time is typically between 40µs to 75µs.
- Can multiple LTC4412 devices be interconnected for more complex power management scenarios?
Yes, two or more LTC4412s can be interconnected to allow load sharing between multiple batteries or charging of multiple batteries from a single charger.
